Duramax rough idle when warm

x2 Aug 18, 2020 · 4. Glow Plug Failue – 2006 LLY Duramax. In 2006, the glow plugs were paired with a problematic glow plug module. At 6.6 liters, these engines (and all other diesels) are big hunks of metal. Because metal absorbs heat, and there is so much of it, starting a diesel engine in cold weather can be a challenge. Jan 30, 2014 · SOURCE: 2004 f350 6.0 diesel.Engine surges Hi, i want you to clean the air intake valve and idle speed control valve, follow the procedure below. Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper ... Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... 01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up. Apr 08, 2012 · It's a common problem, especially on cylinders 2 & 7. Will cause a rough idle/clatter, and no throttle response, because the engine is in limp mode and running on four cylinders. Try unplugging and plugging them in, see if anything changes. Remember that a Dmax is numbered opposite of a gas engine. #2 is on the drivers side. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ... Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform.The truck idles rough as can be but does not seem to always do it. The balance rates on every injector go back and forth between -7 to +15 when acting up. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps.Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read moreRough Idle Solved! - 2014-2018 Silverado & Sierra Troubleshooting - GM-Trucks.com. By ic3man5, January 24, 2016 in 2014-2018 Silverado & Sierra Troubleshooting. Share.Hey guys, I have a bone stock 2004.5 duramax. Sometimes it has a really rough idle. I can only notice it when its in gear and i am at a stop. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. Aug 04, 2020 · 5 Most Common LBZ Duramax 6.6L Engine Problems. 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of producing over 600whp and 1,000lb-ft. of torque. However, one common failure point on tuned LBZ’s is cracked pistons. Hey guys, I have a bone stock 2004.5 duramax. Sometimes it has a really rough idle. I can only notice it when its in gear and i am at a stop. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. Oct 23, 2013 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Suspension & Steering - 2001 - 2010 Recommended Communities Pirate 4x4 Forum If the truck idles smooth at 950rpm without surging, that is completely understandable as its an elevated idle to warm the truck up. Mine does not hold an rpm during warm up. 2017 Colorado Z71 Duramax - GMPP skid plates, ZR2 sliders, H11 LED's, Lumin-X yellow fogs, Gator Tri-fold, Sumo Springs, Bilstein 5100's, 265/65R17 Ridge Grapplers, AFE Hi ...If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things... My truck is a 04.5 LLY/Alli CCSB. since the dy after i bought the truck its had somewhat a choppy or rough idle. From research first guess was filter head or FPR. While rebuilding the filter head i found the inlet was almost blocked off from what looked like sand. so new filter head, filter, hoses, & Carter lift pump was thrown on.When the truck is up to operating temp now I have no more rough idle and after rev the acual pressure drops barely below less than 100 after rev. This issue was very sensitive to air temp as well as the operating coolant temp of the engine. Seemed to never occur until ECM demanded lower idle rail pressure due to being up to operating temperature.level 1 CRUMPETKILLA187 · 3y · edited 3y If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load.Dec 23, 2008 · The blender door is controlled by vacuum. Also, check your coolant level. If you are low on coolant you don't have enough circulating into the heater core. Chris. 2004 F350 Regular Cab Long Box XLT; FX4, 6.0L and TorqShift; Manual Transfer Case and Hubs; Dark Shadow Grey Metallic; Keyless Entry; Factory Idle Control; 8 1/2' Fisher MMII; Factory ... Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform.Oct 23, 2013 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Suspension & Steering - 2001 - 2010 Recommended Communities Pirate 4x4 Forum Dec 01, 2017 · Pete, It's Ken in WY again with another "04 LLY VIN 2 Duramax problem. After warmup it has a rough idle. In gear a definite surge can be felt intermittently. In neutral a perceptible stumble/miss can … read more Aug 07, 2020 · A Wonky fuel pressure regulator can cause rough idle when warm. Once again, this problem may not show up when cold because the computer commands a rich mixture and high idle when cold. Once warm, a bad fuel pressure regulator can cause a rough idle by leaning out the mixture due to low fuel pressure. What wouldn’t cause a rough idle when warm Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... Feb 01, 2021 · Next, inspect all the components to find the actual cause of the rough idle. 3. Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location. Jul 08, 2014 · There are a few things that would effect the idle. The FICM will cause a rough idle if the fuel flow is too high, (Liftpump pressure) or too low (air bubbles in the fuel). It could also be higher rail pressure causing the lope. The rail pressure sensor could give incorrect readings to the ECM, causing the FPR to fuel more than it needs. I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. Nov 05, 2020 · Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model. I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.Rough Idle Solved! - 2014-2018 Silverado & Sierra Troubleshooting - GM-Trucks.com. By ic3man5, January 24, 2016 in 2014-2018 Silverado & Sierra Troubleshooting. Share.Im having the same symptoms. truck does great til it hits 180 then idles rough. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. I've went over every stitch of wiring and cleaned every sensor. my balance rates are surprisingly pretty good, only one over 3 in park and it barely gets over 3 ...My 2010 Duramax runs rough when first started for the day. #8 injector jumps up to 7.7mm . The rest all are +- 0. I have had 3 different injectors in the #8 spot and it still does the same thing. And yes , I used my Tech2 to recalibrate flow rates. It only does it till the engine temp gets up to about 100-110 degrees. Then it runs fine.2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. The truck idles rough as can be but does not seem to always do it. The balance rates on every injector go back and forth between -7 to +15 when acting up. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps.Apr 19, 2011 · 1,066. oh, ok, yes sounds like the fuel wire harness chaffing. Yes, 680 is stock idle speed. If you can see the tach needle moving around while stationary, you have a problem. Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email. Custom Tuning Services. Dec 28, 2007 · It started doing this when it got cold outside. When the truck start up it idles really rough and the whole truck rocks like it has a cam. To me a sound like it has too much fuel and sounds like missing on the exhaust. When it idles why is the spark all over the place? Here is the log file. level 1 CRUMPETKILLA187 · 3y · edited 3y If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load. Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... Mar 14, 2015 · 2004 silverado 2500hd with lb7 duramax. it was running fine but the injectors were going bad so I replaced all 8 with bosch remans and new hp lines. now it has an idle shake gets worse till 1500 rpm then the shake goes away. changed the stock fuel filter to a nicktane then back to stock to see if... There are many 3.0 Duramax owners who experience common malfunctions, such as injector failure or turbocharger failure. Problems like the EGR valve failing or getting stuck open may also happen to your Duramax 3.0. Most of these malfunctions are due to a lack of maintenance. If you take care of your Duramax engine, it will last for many years ... 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read morelevel 1 CRUMPETKILLA187 · 3y · edited 3y If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load.Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it's amplified ...Nov 05, 2020 · Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model. Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load. Don't waste a bunch of time and money throwing ... Jan 18, 2020 · This 'elevated idle' is standard on 6.6L duramax. Elevated Idle. The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial ...This issue has been resolved since February 2013. It was the fuel pressure regulator or FPR as people keep commenting. I am leaving this video on youtube for... Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform.well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n …Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... Apr 19, 2011 · 1,066. oh, ok, yes sounds like the fuel wire harness chaffing. Yes, 680 is stock idle speed. If you can see the tach needle moving around while stationary, you have a problem. Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email. Custom Tuning Services. Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. Apr 10, 2014 #1 Lately since I put my new 37's on, I had to change the tune to recalibrate the speedo and made some minor changes to the timing, boost, and fuel tables. It has been running rough and lopes pretty bad at idle only when it is cold, it smooth out a bit once you give it some throttle over 850 rpm. Once it warms up, the issue goes away.There are a few things that would effect the idle. The FICM will cause a rough idle if the fuel flow is too high, (Liftpump pressure) or too low (air bubbles in the fuel). It could also be higher rail pressure causing the lope. The rail pressure sensor could give incorrect readings to the ECM, causing the FPR to fuel more than it needs.01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up. Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... Jul 27, 2021 · I have been following this thread for a while, I have a 2005 LLY 3500 with warm rough idle and was very rough when coming down to idle after rev for a second or so, rough idle only occured after ECM demanded idle pressure down to the 4350 area (Warm). Actual pressure coming down to idle after rev dropped to about 3300 for a second when ecm ... Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... Jul 27, 2021 · 2005 Duramax Rough Idle. I have the same problem I replaced all of the injectors at 102000 miles and one week later it started missing again a guy told me it is my fuel pump on the engine when the fuel is cold the fuel is denser and when the fuel is hot it is thinner and the pump can build pressure better when the fuel is denser and I said the ... 248 Posts. #9 · Mar 19, 2010. riverratba said: i have a 2005 3500 dually, when i start it up if its been sitting for awhile it runs extremely rough until it warms up then runs fine. you can bring the rpms up just a tad and it seems to smooth out some. i just bought this truck and am new to the dodge and cummins so any help would be appreciated!!My 2005 Duramax LLY had a rough idle and surging while holding the brake. I changed the Fuel pressure Relief Valve with a race plug and it corrected the pro... Jan 30, 2014 · SOURCE: 2004 f350 6.0 diesel.Engine surges Hi, i want you to clean the air intake valve and idle speed control valve, follow the procedure below. Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper ... If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things... Aug 18, 2020 · 4. Glow Plug Failue – 2006 LLY Duramax. In 2006, the glow plugs were paired with a problematic glow plug module. At 6.6 liters, these engines (and all other diesels) are big hunks of metal. Because metal absorbs heat, and there is so much of it, starting a diesel engine in cold weather can be a challenge. The truck idles rough as can be but does not seem to always do it. The balance rates on every injector go back and forth between -7 to +15 when acting up. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps.Aug 18, 2020 · 4. Glow Plug Failue – 2006 LLY Duramax. In 2006, the glow plugs were paired with a problematic glow plug module. At 6.6 liters, these engines (and all other diesels) are big hunks of metal. Because metal absorbs heat, and there is so much of it, starting a diesel engine in cold weather can be a challenge. Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Next component causing rough idle when warm is PCV Valve. Fix it by servicing the component and later, ensuring that it's fully operational and clean. 5. Check EGR Valve A damaged EGR will make the engine light turn on, thus indicating towards a culprit revealed by the code reader. It can either be cleaned or replaced. 6. Check Air FilterApr 19, 2011 · 1,066. oh, ok, yes sounds like the fuel wire harness chaffing. Yes, 680 is stock idle speed. If you can see the tach needle moving around while stationary, you have a problem. Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email. Custom Tuning Services. Feb 19, 2006 · 03 Duramax Rough Idle. Started up the truck today and was very unhappy to find that it had a rough idle. The block warmer died this past week so I haven't been able to plug it in. I figured it was just a little cold so I let it run for a bit and it was still idling really rough. 1 .4. If idle vibration could Not be turned off/on with that bolt, tighten bolt then loosen next bolt - front bolt. 1.5. If idle vibration could Not be turned off/on - repeat process with middle bolt. 1 .6. If the idle vibration Could be turned off/on with one bolt, add a spacer washer, approximately 2.5 mm thick (1) when the engine mount and frame If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things... Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... When the truck is warmed up, (cold or hot outside) it idles fine, runs fine, no problems. Some more information: Slight pressure in the coolant reservoir Normal oil pressure Coolant hoses are running coolant and don't remain hard or pressurized after sitting at night Head gasket was changed about 20k miles ago along with injectors.Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Oct 23, 2013 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Suspension & Steering - 2001 - 2010 Recommended Communities Pirate 4x4 Forum Feb 19, 2006 · 03 Duramax Rough Idle. Started up the truck today and was very unhappy to find that it had a rough idle. The block warmer died this past week so I haven't been able to plug it in. I figured it was just a little cold so I let it run for a bit and it was still idling really rough. Anyone else having rough idle. Sign up for FREE! Become a GM-Trucks.com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM ...Jul 27, 2021 · 2005 Duramax Rough Idle. I have the same problem I replaced all of the injectors at 102000 miles and one week later it started missing again a guy told me it is my fuel pump on the engine when the fuel is cold the fuel is denser and when the fuel is hot it is thinner and the pump can build pressure better when the fuel is denser and I said the ... Feb 19, 2006 · 03 Duramax Rough Idle. Started up the truck today and was very unhappy to find that it had a rough idle. The block warmer died this past week so I haven't been able to plug it in. I figured it was just a little cold so I let it run for a bit and it was still idling really rough. If the truck idles smooth at 950rpm without surging, that is completely understandable as its an elevated idle to warm the truck up. Mine does not hold an rpm during warm up. 2017 Colorado Z71 Duramax - GMPP skid plates, ZR2 sliders, H11 LED's, Lumin-X yellow fogs, Gator Tri-fold, Sumo Springs, Bilstein 5100's, 265/65R17 Ridge Grapplers, AFE Hi ...When the truck is warmed up, (cold or hot outside) it idles fine, runs fine, no problems. Some more information: Slight pressure in the coolant reservoir Normal oil pressure Coolant hoses are running coolant and don't remain hard or pressurized after sitting at night Head gasket was changed about 20k miles ago along with injectors.Im having the same symptoms. truck does great til it hits 180 then idles rough. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. I've went over every stitch of wiring and cleaned every sensor. my balance rates are surprisingly pretty good, only one over 3 in park and it barely gets over 3 ...Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... one thing you might want to check if you have access to a scan tool would be your actual fuel rail pressure while idling engine warmed up, if it jumps more than 100-200 psi it is possibly your fuel pressure regulator on the back of the injection pump, example idling when warm will be around 4.2 kpsi if it jumps to 4.3 then to 4.1 then back to 4.2 …Dec 28, 2007 · It started doing this when it got cold outside. When the truck start up it idles really rough and the whole truck rocks like it has a cam. To me a sound like it has too much fuel and sounds like missing on the exhaust. When it idles why is the spark all over the place? Here is the log file. Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... 2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Jul 27, 2015 · The rough running at idle when warm is probably the EITMS kicking in. It will shut down the rear cylinder at idle to help keep the engine cool. Makes it idle funny but is totally normal. I did a stage 1 with new head pipes on my 2015. It seems to run cooler than my 2009 stage 1 with lowers. +1 on the EITMS. Mine came disabled. Feb 01, 2021 · Next, inspect all the components to find the actual cause of the rough idle. 3. Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location. Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... Jan 15, 2015 · After engine is warm it idles very rough & low rpm. Doesn't stall while in gear, but stalls sometimes when shifting from park into drive (or reverse). Posted by Cheryl on Mar 24, 2014 Dec 01, 2017 · Pete, It's Ken in WY again with another "04 LLY VIN 2 Duramax problem. After warmup it has a rough idle. In gear a definite surge can be felt intermittently. In neutral a perceptible stumble/miss can … read more Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. 21 hours ago · The noise usually is most noticeable at the rear of the driver's side front wheel well.Apr 02, 2021 · 6.4 Powerstroke Idle Problems. The Problem: Rough idle is a symptom of many problems; high-pressure fuel pump failure, bad fuel injectors, EGR system problems, and quite a few more issues. Discussion Starter · #1 · Oct 21, 2010 Ok guys this is driving me crazy. My truck after it has warmed up has a real bad idle. Also after warm up when I let off the go peddle and the truck idles down the truck kind of jurks with the rough idle. Has any one gone threw this issue? It's been going on now for about 5k miles.Apr 03, 2020 · Joined Sep 27, 2015. 600 Posts. Discussion Starter · #1 · Apr 3, 2020 (Edited) Started the truck yesterday and noticed the idle sounded off and that truck was shaking. Figured it’d warm up and stop but it did not, drive to Walmart and could notice it while driving also. Unsure if it’s okay to drive short distances or not but don’t want ... When the truck is warmed up, (cold or hot outside) it idles fine, runs fine, no problems. Some more information: Slight pressure in the coolant reservoir Normal oil pressure Coolant hoses are running coolant and don't remain hard or pressurized after sitting at night Head gasket was changed about 20k miles ago along with injectors.Aug 04, 2020 · 5 Most Common LBZ Duramax 6.6L Engine Problems. 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of producing over 600whp and 1,000lb-ft. of torque. However, one common failure point on tuned LBZ’s is cracked pistons. ROCKETANSKY. MEMBER. 2001 GMC C3500. V8. 4WD. MANUAL. 115,000 MILES. My truck (Duramax Diesel) just recently started idling rough and has excessive exhaust smoke. Im thinking injectors but there are no trouble codes reported on my reader. The warmest I have had it idle and not lope so far is 165, so somewhere between 165-185 something seems to be happening. I did just swap positions on my injectors 7 & 5 last Saturday, but did not have this start happening till the last couple of days.Jun 02, 2021 · Engine misfires, rough idling; Shaky engine, poor performance; Duramax L5P Reliability. The L5P is considered the most reliable post-emissions Duramax made to date. With the removal of the CP4.2 fuel injection pump and various improvements made to the block, pistons, and other internals, the engine itself is extremely capable and reliable. Jan 18, 2020 · This 'elevated idle' is standard on 6.6L duramax. Elevated Idle. The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). ROCKETANSKY. MEMBER. 2001 GMC C3500. V8. 4WD. MANUAL. 115,000 MILES. My truck (Duramax Diesel) just recently started idling rough and has excessive exhaust smoke. Im thinking injectors but there are no trouble codes reported on my reader. 21 hours ago · The noise usually is most noticeable at the rear of the driver's side front wheel well.Apr 02, 2021 · 6.4 Powerstroke Idle Problems. The Problem: Rough idle is a symptom of many problems; high-pressure fuel pump failure, bad fuel injectors, EGR system problems, and quite a few more issues. Discussion Starter · #1 · Oct 21, 2010 Ok guys this is driving me crazy. My truck after it has warmed up has a real bad idle. Also after warm up when I let off the go peddle and the truck idles down the truck kind of jurks with the rough idle. Has any one gone threw this issue? It's been going on now for about 5k miles.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ... I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.The warmest I have had it idle and not lope so far is 165, so somewhere between 165-185 something seems to be happening. I did just swap positions on my injectors 7 & 5 last Saturday, but did not have this start happening till the last couple of days.Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. Jul 27, 2021 · I have been following this thread for a while, I have a 2005 LLY 3500 with warm rough idle and was very rough when coming down to idle after rev for a second or so, rough idle only occured after ECM demanded idle pressure down to the 4350 area (Warm). Actual pressure coming down to idle after rev dropped to about 3300 for a second when ecm ... Aug 18, 2020 · 4. Glow Plug Failue – 2006 LLY Duramax. In 2006, the glow plugs were paired with a problematic glow plug module. At 6.6 liters, these engines (and all other diesels) are big hunks of metal. Because metal absorbs heat, and there is so much of it, starting a diesel engine in cold weather can be a challenge. Jul 27, 2015 · The rough running at idle when warm is probably the EITMS kicking in. It will shut down the rear cylinder at idle to help keep the engine cool. Makes it idle funny but is totally normal. I did a stage 1 with new head pipes on my 2015. It seems to run cooler than my 2009 stage 1 with lowers. +1 on the EITMS. Mine came disabled. Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... My 2005 Duramax LLY had a rough idle and surging while holding the brake. I changed the Fuel pressure Relief Valve with a race plug and it corrected the pro... Jul 28, 2014 · I have a 2007 Limited Expedition 5.4 with 208,000 miles. It's having a problem with a rough idle in hot weather. Typically, at night or when day-time temps are below 90, it runs fine and I have no idle issues, even after the truck is warmed up. But, if the outside temperature gets into the upper 90s, I'll have the rough idle when I'm stopped at ... Feb 19, 2006 · 03 Duramax Rough Idle. Started up the truck today and was very unhappy to find that it had a rough idle. The block warmer died this past week so I haven't been able to plug it in. I figured it was just a little cold so I let it run for a bit and it was still idling really rough. Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n …Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load. Don't waste a bunch of time and money throwing ... Apr 03, 2020 · Joined Sep 27, 2015. 600 Posts. Discussion Starter · #1 · Apr 3, 2020 (Edited) Started the truck yesterday and noticed the idle sounded off and that truck was shaking. Figured it’d warm up and stop but it did not, drive to Walmart and could notice it while driving also. Unsure if it’s okay to drive short distances or not but don’t want ... Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. 21 hours ago · The noise usually is most noticeable at the rear of the driver's side front wheel well.Apr 02, 2021 · 6.4 Powerstroke Idle Problems. The Problem: Rough idle is a symptom of many problems; high-pressure fuel pump failure, bad fuel injectors, EGR system problems, and quite a few more issues. Mar 29, 2017 · 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read more The truck idles rough as can be but does not seem to always do it. The balance rates on every injector go back and forth between -7 to +15 when acting up. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps.Jun 18, 2022 · Rough Idle When Warm: Check the spark plugs. Before you start replacing parts, diagnose your engine. The first step is to check the spark plugs. Spark plugs are prone to problems such as being loose or missing, damaged, worn out, corroded and covered in oil or carbon build-up. If the spark plugs appear to be working correctly then inspect your ... There are a few things that would effect the idle. The FICM will cause a rough idle if the fuel flow is too high, (Liftpump pressure) or too low (air bubbles in the fuel). It could also be higher rail pressure causing the lope. The rail pressure sensor could give incorrect readings to the ECM, causing the FPR to fuel more than it needs.Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... Jun 12, 2022 · 4,840. Location. Naperville, IL. Jun 11, 2022. #1. Our Duramax L5P has 19,000 miles on it now, mostly pulling our 5th wheel trailer. Since about 10,000 miles I have noticed a small lope in the idle, which progressed to what I would call a slight miss in what felt like one cylinder. I noticed no difference in power or fuel economy while pulling. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ... Aug 04, 2020 · 5 Most Common LBZ Duramax 6.6L Engine Problems. 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of producing over 600whp and 1,000lb-ft. of torque. However, one common failure point on tuned LBZ’s is cracked pistons. level 1 CRUMPETKILLA187 · 3y · edited 3y If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load.If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things...I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.Jul 27, 2015 · The rough running at idle when warm is probably the EITMS kicking in. It will shut down the rear cylinder at idle to help keep the engine cool. Makes it idle funny but is totally normal. I did a stage 1 with new head pipes on my 2015. It seems to run cooler than my 2009 stage 1 with lowers. +1 on the EITMS. Mine came disabled. Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. Aug 07, 2020 · A Wonky fuel pressure regulator can cause rough idle when warm. Once again, this problem may not show up when cold because the computer commands a rich mixture and high idle when cold. Once warm, a bad fuel pressure regulator can cause a rough idle by leaning out the mixture due to low fuel pressure. What wouldn’t cause a rough idle when warm This issue has been resolved since February 2013. It was the fuel pressure regulator or FPR as people keep commenting. I am leaving this video on youtube for... Feb 19, 2006 · 03 Duramax Rough Idle. Started up the truck today and was very unhappy to find that it had a rough idle. The block warmer died this past week so I haven't been able to plug it in. I figured it was just a little cold so I let it run for a bit and it was still idling really rough. Jun 02, 2021 · Engine misfires, rough idling; Shaky engine, poor performance; Duramax L5P Reliability. The L5P is considered the most reliable post-emissions Duramax made to date. With the removal of the CP4.2 fuel injection pump and various improvements made to the block, pistons, and other internals, the engine itself is extremely capable and reliable. Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. Jan 18, 2020 · This 'elevated idle' is standard on 6.6L duramax. Elevated Idle. The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things... Mar 14, 2015 · 2004 silverado 2500hd with lb7 duramax. it was running fine but the injectors were going bad so I replaced all 8 with bosch remans and new hp lines. now it has an idle shake gets worse till 1500 rpm then the shake goes away. changed the stock fuel filter to a nicktane then back to stock to see if... Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Anyone else having rough idle. Sign up for FREE! Become a GM-Trucks.com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM ...Jul 27, 2021 · 2005 Duramax Rough Idle. I have the same problem I replaced all of the injectors at 102000 miles and one week later it started missing again a guy told me it is my fuel pump on the engine when the fuel is cold the fuel is denser and when the fuel is hot it is thinner and the pump can build pressure better when the fuel is denser and I said the ... I have a 2004 gmc duramax has a rough idle at times like a miss and black smoke when you rev it up.I also notice that it is lacking on bottom end power just had new injectors and fpr and head gaskets.The rough idle in park will sometimes go away and come back with in a few seconds. 01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up. Oct 24, 2021 · Rough idle when first started ... my engine and let it warm up before leaving ... 2L '11 Caprice PPV 6.0L '08 Avalanche LTZ 6.0L 2021 Sierra Elevation 3.0L Duramax Feb 01, 2021 · Next, inspect all the components to find the actual cause of the rough idle. 3. Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location. Rough Idle Solved! - 2014-2018 Silverado & Sierra Troubleshooting - GM-Trucks.com. By ic3man5, January 24, 2016 in 2014-2018 Silverado & Sierra Troubleshooting. Share.My 2010 Duramax runs rough when first started for the day. #8 injector jumps up to 7.7mm . The rest all are +- 0. I have had 3 different injectors in the #8 spot and it still does the same thing. And yes , I used my Tech2 to recalibrate flow rates. It only does it till the engine temp gets up to about 100-110 degrees. Then it runs fine.1,811 Answers. Re: I have 04 Duramax sometimes runs rough loss of power... As I've told others, the rough running and smoke is from excess fuel when engine is running and warm. The temperature sensor is faulty, have it checked, and the computer is holding it in "cold start mode", like tehchoke is still on. Posted on Aug 29, 2017. Mar 14, 2015 · 2004 silverado 2500hd with lb7 duramax. it was running fine but the injectors were going bad so I replaced all 8 with bosch remans and new hp lines. now it has an idle shake gets worse till 1500 rpm then the shake goes away. changed the stock fuel filter to a nicktane then back to stock to see if... Jul 27, 2021 · 2005 Duramax Rough Idle. I have the same problem I replaced all of the injectors at 102000 miles and one week later it started missing again a guy told me it is my fuel pump on the engine when the fuel is cold the fuel is denser and when the fuel is hot it is thinner and the pump can build pressure better when the fuel is denser and I said the ... Apr 08, 2012 · It's a common problem, especially on cylinders 2 & 7. Will cause a rough idle/clatter, and no throttle response, because the engine is in limp mode and running on four cylinders. Try unplugging and plugging them in, see if anything changes. Remember that a Dmax is numbered opposite of a gas engine. #2 is on the drivers side. Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... 21 hours ago · The noise usually is most noticeable at the rear of the driver's side front wheel well.Apr 02, 2021 · 6.4 Powerstroke Idle Problems. The Problem: Rough idle is a symptom of many problems; high-pressure fuel pump failure, bad fuel injectors, EGR system problems, and quite a few more issues. Jul 27, 2021 · 2005 Duramax Rough Idle. I have the same problem I replaced all of the injectors at 102000 miles and one week later it started missing again a guy told me it is my fuel pump on the engine when the fuel is cold the fuel is denser and when the fuel is hot it is thinner and the pump can build pressure better when the fuel is denser and I said the ... Mar 29, 2017 · 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read more Aug 07, 2020 · A Wonky fuel pressure regulator can cause rough idle when warm. Once again, this problem may not show up when cold because the computer commands a rich mixture and high idle when cold. Once warm, a bad fuel pressure regulator can cause a rough idle by leaning out the mixture due to low fuel pressure. What wouldn’t cause a rough idle when warm Rough Idle Solved! - 2014-2018 Silverado & Sierra Troubleshooting - GM-Trucks.com. By ic3man5, January 24, 2016 in 2014-2018 Silverado & Sierra Troubleshooting. Share.Mar 14, 2015 · 2004 silverado 2500hd with lb7 duramax. it was running fine but the injectors were going bad so I replaced all 8 with bosch remans and new hp lines. now it has an idle shake gets worse till 1500 rpm then the shake goes away. changed the stock fuel filter to a nicktane then back to stock to see if... well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n …one thing you might want to check if you have access to a scan tool would be your actual fuel rail pressure while idling engine warmed up, if it jumps more than 100-200 psi it is possibly your fuel pressure regulator on the back of the injection pump, example idling when warm will be around 4.2 kpsi if it jumps to 4.3 then to 4.1 then back to 4.2 …Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. Discussion Starter · #1 · Oct 21, 2010 Ok guys this is driving me crazy. My truck after it has warmed up has a real bad idle. Also after warm up when I let off the go peddle and the truck idles down the truck kind of jurks with the rough idle. Has any one gone threw this issue? It's been going on now for about 5k miles.Rough Idle Solved! - 2014-2018 Silverado & Sierra Troubleshooting - GM-Trucks.com. By ic3man5, January 24, 2016 in 2014-2018 Silverado & Sierra Troubleshooting. Share.A Wonky fuel pressure regulator can cause rough idle when warm Once again, this problem may not show up when cold because the computer commands a rich mixture and high idle when cold. Once warm, a bad fuel pressure regulator can cause a rough idle by leaning out the mixture due to low fuel pressure. What wouldn't cause a rough idle when warmJan 22, 2013 · It was doing it during the warm idle. (obviously a 20 min log file is too large to post) E60-21 - Logged idle after trip to lunch E60-22 - Idle after trip back from lunch E60-23 - Drive home from work same deal, cut out the middle, only left in startup idle and warm idle at end of trip. It was warmer today nearly hit 60 F. ROCKETANSKY. MEMBER. 2001 GMC C3500. V8. 4WD. MANUAL. 115,000 MILES. My truck (Duramax Diesel) just recently started idling rough and has excessive exhaust smoke. Im thinking injectors but there are no trouble codes reported on my reader. 21 hours ago · The noise usually is most noticeable at the rear of the driver's side front wheel well.Apr 02, 2021 · 6.4 Powerstroke Idle Problems. The Problem: Rough idle is a symptom of many problems; high-pressure fuel pump failure, bad fuel injectors, EGR system problems, and quite a few more issues. 2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Mar 29, 2017 · 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read more Im having the same symptoms. truck does great til it hits 180 then idles rough. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. I've went over every stitch of wiring and cleaned every sensor. my balance rates are surprisingly pretty good, only one over 3 in park and it barely gets over 3 ...Jul 27, 2021 · I have been following this thread for a while, I have a 2005 LLY 3500 with warm rough idle and was very rough when coming down to idle after rev for a second or so, rough idle only occured after ECM demanded idle pressure down to the 4350 area (Warm). Actual pressure coming down to idle after rev dropped to about 3300 for a second when ecm ... Apr 08, 2012 · It's a common problem, especially on cylinders 2 & 7. Will cause a rough idle/clatter, and no throttle response, because the engine is in limp mode and running on four cylinders. Try unplugging and plugging them in, see if anything changes. Remember that a Dmax is numbered opposite of a gas engine. #2 is on the drivers side. 2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. Nov 05, 2020 · Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model. Im having the same symptoms. truck does great til it hits 180 then idles rough. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. I've went over every stitch of wiring and cleaned every sensor. my balance rates are surprisingly pretty good, only one over 3 in park and it barely gets over 3 ...Hey guys, I have a bone stock 2004.5 duramax. Sometimes it has a really rough idle. I can only notice it when its in gear and i am at a stop. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... Sep 29, 2010 · Little off airboat subject but I finally found my driveability issue today on my GMC. I located a sticking Fuel Press Reg solenoid mounted on my injection pump after about three days of troubleshooting. My truck would at times, especially when hot, jerk at idle and miss slightly. It would also... 2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Apr 15, 2020 · Duramax Diesel Warm Engine Idle Knock Sound. April 15, 2020. Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified ... Jan 18, 2020 · This 'elevated idle' is standard on 6.6L duramax. Elevated Idle. The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). Nov 02, 2016 · I have a slightly rough idle that started about 3 weeks ago. From the start in the morning with a cold engine to normal temps... it idles rough at a stop. But the acceleration and drive is fine. Takes off good. Only at a stop do I feel a slight shimmy. Does not feel like it will cut off or anything. The truck idles rough as can be but does not seem to always do it. The balance rates on every injector go back and forth between -7 to +15 when acting up. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps.Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. ROCKETANSKY. MEMBER. 2001 GMC C3500. V8. 4WD. MANUAL. 115,000 MILES. My truck (Duramax Diesel) just recently started idling rough and has excessive exhaust smoke. Im thinking injectors but there are no trouble codes reported on my reader. Nov 24, 2018 · The 5 Best Ford V8 Engines of All-Time. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. Hey guys, I have a bone stock 2004.5 duramax. Sometimes it has a really rough idle. I can only notice it when its in gear and i am at a stop. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. Apr 08, 2012 · It's a common problem, especially on cylinders 2 & 7. Will cause a rough idle/clatter, and no throttle response, because the engine is in limp mode and running on four cylinders. Try unplugging and plugging them in, see if anything changes. Remember that a Dmax is numbered opposite of a gas engine. #2 is on the drivers side. Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... Aug 04, 2020 · 5 Most Common LBZ Duramax 6.6L Engine Problems. 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of producing over 600whp and 1,000lb-ft. of torque. However, one common failure point on tuned LBZ’s is cracked pistons. well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n …When the truck is warmed up, (cold or hot outside) it idles fine, runs fine, no problems. Some more information: Slight pressure in the coolant reservoir Normal oil pressure Coolant hoses are running coolant and don't remain hard or pressurized after sitting at night Head gasket was changed about 20k miles ago along with injectors.Aug 18, 2020 · 4. Glow Plug Failue – 2006 LLY Duramax. In 2006, the glow plugs were paired with a problematic glow plug module. At 6.6 liters, these engines (and all other diesels) are big hunks of metal. Because metal absorbs heat, and there is so much of it, starting a diesel engine in cold weather can be a challenge. There are many 3.0 Duramax owners who experience common malfunctions, such as injector failure or turbocharger failure. Problems like the EGR valve failing or getting stuck open may also happen to your Duramax 3.0. Most of these malfunctions are due to a lack of maintenance. If you take care of your Duramax engine, it will last for many years ... Jan 15, 2015 · After engine is warm it idles very rough & low rpm. Doesn't stall while in gear, but stalls sometimes when shifting from park into drive (or reverse). Posted by Cheryl on Mar 24, 2014 If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load. Don't waste a bunch of time and money throwing ... If the truck idles smooth at 950rpm without surging, that is completely understandable as its an elevated idle to warm the truck up. Mine does not hold an rpm during warm up. 2017 Colorado Z71 Duramax - GMPP skid plates, ZR2 sliders, H11 LED's, Lumin-X yellow fogs, Gator Tri-fold, Sumo Springs, Bilstein 5100's, 265/65R17 Ridge Grapplers, AFE Hi ...Jul 28, 2014 · I have a 2007 Limited Expedition 5.4 with 208,000 miles. It's having a problem with a rough idle in hot weather. Typically, at night or when day-time temps are below 90, it runs fine and I have no idle issues, even after the truck is warmed up. But, if the outside temperature gets into the upper 90s, I'll have the rough idle when I'm stopped at ... Feb 01, 2021 · Next, inspect all the components to find the actual cause of the rough idle. 3. Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location. I have a 2018 diesel canyon with 38k now. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. It would bounce a couple 100 RPM and I would drive down the street to the stop light then it would be gone. Been on and off since then and at this rate I thought it was normal.Jun 10, 2022 · Spark Plugs. A rough engine idle, can be caused by, spark plugs or wires. Spark plugs use the electrical current, received from ignition coils; to ignite the air/fuel mixture, within the combustion chamber. A plug that is damaged or installed incorrectly, can result in fuel being burned, at an inconsistent rate. Mar 29, 2017 · 1999 GMC 3500 cube van, display's no codes. cold start, smokes and idles rough for 5 to10 seconds then smoothes out fine. cold takeoff, surges and bucks until it warms up, then runs fine. crusing spee … read more Hey guys, I have a bone stock 2004.5 duramax. Sometimes it has a really rough idle. I can only notice it when its in gear and i am at a stop. I can hear the engine "laboring" at one spot and it lunges forward at that exact spot. 2004 duramax 6.6 lly No Codes, Runs ok In Idle..Check Fuel..Run Rough 2004 Duramax 6.6 LLY No Codes, Runs OK In Idle, Check Fuel Balance Rate, #7 Injector Spec Is 4.5 In Idle, All Of A Sudden At Spec On Injectors Go To 0 and Starts To Run Rough At Idle … Oct 23, 2013 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Suspension & Steering - 2001 - 2010 Recommended Communities Pirate 4x4 Forum Apr 03, 2020 · Joined Sep 27, 2015. 600 Posts. Discussion Starter · #1 · Apr 3, 2020 (Edited) Started the truck yesterday and noticed the idle sounded off and that truck was shaking. Figured it’d warm up and stop but it did not, drive to Walmart and could notice it while driving also. Unsure if it’s okay to drive short distances or not but don’t want ... Next component causing rough idle when warm is PCV Valve. Fix it by servicing the component and later, ensuring that it's fully operational and clean. 5. Check EGR Valve A damaged EGR will make the engine light turn on, thus indicating towards a culprit revealed by the code reader. It can either be cleaned or replaced. 6. Check Air Filter248 Posts. #9 · Mar 19, 2010. riverratba said: i have a 2005 3500 dually, when i start it up if its been sitting for awhile it runs extremely rough until it warms up then runs fine. you can bring the rpms up just a tad and it seems to smooth out some. i just bought this truck and am new to the dodge and cummins so any help would be appreciated!!Started the truck yesterday and noticed the idle sounded off and that truck was shaking. Figured it'd warm up and stop but it did not, drive to Walmart and could notice it while driving also. Unsure if it's okay to drive short distances or not but don't want to mess anything up too bad if I can help it. 1.Dec 11, 2017 · Hey guys, been having problems with my 2005 duramax. I have been having issues with the truck when warm, it runs and idles fine when cold but when the engjne reaches around 160 or more it starts to like lope at idle and when driving and coming to a stop it lopes really bad, I have changed fpr, 8 new 50hp dragon fly injectors from industrial injection, checked wiring, kinda lost now. My truck is a 04.5 LLY/Alli CCSB. since the dy after i bought the truck its had somewhat a choppy or rough idle. From research first guess was filter head or FPR. While rebuilding the filter head i found the inlet was almost blocked off from what looked like sand. so new filter head, filter, hoses, & Carter lift pump was thrown on.My truck is a 04.5 LLY/Alli CCSB. since the dy after i bought the truck its had somewhat a choppy or rough idle. From research first guess was filter head or FPR. While rebuilding the filter head i found the inlet was almost blocked off from what looked like sand. so new filter head, filter, hoses, & Carter lift pump was thrown on.01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up. Feb 01, 2021 · Next, inspect all the components to find the actual cause of the rough idle. 3. Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location. Jan 21, 2011 · well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n … If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue.As stated in the video, there are several things...Feb 22, 2020. #1. Hi everyone. Just signed up to the forum. I picked up my 2020 Denali 2500 hd duramax this week and noticed a loud knocking at idle which increases in volume as the engine warms up. Went back in to the dealer before I even left the lot and saw the service advisor and the diesel tech who both said it was normal.Jan 15, 2015 · After engine is warm it idles very rough & low rpm. Doesn't stall while in gear, but stalls sometimes when shifting from park into drive (or reverse). Posted by Cheryl on Mar 24, 2014 Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... Jan 21, 2011 · well i was changin a block heater out fer a guy with a 2002 duramax and when we started her up to let er warm up it started idlin pretty rough. he said it started doin that about a week before and asked for my input. i did a little searchin around and gathered possibly fuel pressure regulator/sensor (idk fer sure) or prolly cp3 pump. asked boss n … Jul 27, 2015 · The rough running at idle when warm is probably the EITMS kicking in. It will shut down the rear cylinder at idle to help keep the engine cool. Makes it idle funny but is totally normal. I did a stage 1 with new head pipes on my 2015. It seems to run cooler than my 2009 stage 1 with lowers. +1 on the EITMS. Mine came disabled. Jul 30, 2007 · I have a 2001, 6.6 Chevy Duramax HD 2500 that has been having the check engine light come on sporadically. The truck has 129K miles and has had the fuel injectors replaced (114K), fuel pressure regulator replaced (99K), and Rail Pressure Sensor replaced and reflashed PCM (129K). The truck exhibits the engine miss at idle only, usually when ... level 1 CRUMPETKILLA187 · 3y · edited 3y If the code is a P0193 (low rail pressure) most mechanics would say replace your fuel filter, however if you have a newer fuel filter you may have a much larger problem. The most likely issue would be a failing cp3. This would cause a rough loping idle and poor performance under heavy engine load.Sep 24, 2020 · Which Duramax 6.6L Engine is Best? LB7 Common Problems (2001-2004) LLY Common Problems (2004-2006) LBZ Common Problems (2006-2007) LMM Common Problems (2007.5-2010) LML Common Problems (2011-2016) Duramax Mod Guides. 5 Best LB7 Performance Mods. 5 Best LML Performance Mods. LBZ Upgraded Intake Guide. LML Cold Air Intake Guide. L5P Performance ... My 2010 Duramax runs rough when first started for the day. #8 injector jumps up to 7.7mm . The rest all are +- 0. I have had 3 different injectors in the #8 spot and it still does the same thing. And yes , I used my Tech2 to recalibrate flow rates. It only does it till the engine temp gets up to about 100-110 degrees. Then it runs fine.01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up. 01. What you will need. To proceed with this tutorial, you need a couple of tools to remove the Duramax fuel pressure regulator. Here is what you need to do so: A socket wrench—you will have to take off a few bolts, you need to have a socket wrench on hand. Penetrating oil—you will spray the bolts to loosen them up.