Duramax surging while driving. Its really noticeable in 2nd gear @ WOT. I pulled the brake safety switch on both my trucks so I didn't have to hit the brakes to put it gear, and when elevated idle is going, as soon as I pop it into gear it idles right down. If you take it to the dealer they should be able to scan it and tell you why its on. long enough to let it idle for 3-4 minutes. open the bleeder top of fuel filter and pump the pump see if air comes out. 02 LB7 2500hd 200k mi; recently started surging slightly at highway speeds; not enough to see it on the speedo/tach but can definitely feel it; idle seems rock solid; recently had the fuel filter housing and fuel supply lines changed out due to fuel oozing on top of the housing/plate and had to push the plunger Jan 14, 2013 · Not sure if its the transmission or not, but I'm thinking it is. Jakystrukk. 305/55R20 Pro Comp Xtreme AT's, Firestone Airbags, HID 6000K Low beams & Fogs, 20" LED Light Bar (IN the Bumper), Banks Dual Exhaust, Edge CTS. Sounds really funky as it surges up and down. Truck started shuttering HARD and smoking, I thought I blew a tire out. 3L V8. -Curtis-. LinCo’s fix, a fuel pressure sensor fooler, solves both of the aforementioned issues, installs in minutes and retails for just $39. To me it definately seems fuel related. I have to bring the vehicle to a stop, often times at dangerous locations during the past three days while traveling back home. Oct 15, 2010 · Went 1st gear 2 gear. You can hear the turbo spool and feel the truck surge as the boost builds and drops. Jan 24, 2012 · Here is some stats on the truck. It has a FASS on it and the stock fuel filter assembly is bypassed and it has all new fuel line from the tank to the engine. 6 LB7 and the truck surges at idle when its in park or in drive. Jun 7, 2017 · 2221 posts · Joined 2016. Inspect these components and replace them if necessary. Dec 29, 2023 · Noise from the fuel tank (a whining sound), difficulty starting your truck, a sputtering engine, stalling, power loss, surges, decreased fuel economy. #1 · Jan 8, 2017. Feb 26, 2011 · Water in a diesel is a real problem, because if injected into the HOT cylinder, it explodes and can blow the tip off an injector and water can damage the CP3 pump. Like too high a gear and rpm is low. Apr 15, 2024 · I recently started having problems from my 2004 lly duramax. The temp gauge( while going down the road) will bottom out and the turbo, fuel everything changes (surges). Making 400hp and 850 ft-lbs of torque when tested on our dyno. 6 Diesel V8 LML engine just shutting off while actively driving. If there was a short i think it would start right off the bat. My fuel filter is basically brand new- 90%, so that shouldn't be an issue. Even when just driving without the cruise on. Turn the key from off to on. Jun 9, 2012 · Kat said: If it died right after putting fuel in. Jan 8, 2017 · 46 posts · Joined 2016. What kind of symptoms are there for head gaskets? When we ran the scan on it while driving he said the truck looked good on everything besides this temperature fluctuation. Repeated probably 20 times truck just sat idling in gear. Ill prime the filter for a sec n then it'll crank up n it's fine! 04 GMC 2500HD lly. It kind of throws you back in your seat and then throws you forward once it shifts. When driving on the road the truck will surge or jerk. It did not die after putting fuel in, he was driving and it died. Could Map actual versus desired rail pressure, if the graph is wavy and there is no air in the system it is usually caused by a bad fuel pressure regulator. This one is specific to the LML code Duramax produced between ’11-’16, which used the Bosch CP4. Apr 19, 2013 · I recently bought an 06 2500 duramax. I know two people who had similar symptoms and it was the battery. I replaced my injectors about 60k miles ago. 5-05 LLY Forum. It's pretty well constant at idle in park. Once the truck warms up and hits around 185 the turbo seems to quit spooling and the truck starts rolling clouds of black smoke. Hey all, My buddy has a STOCK 2002 D-max that has stalled out twice in the last two days while driving. I have a 04. * Too much / certain fuel additives user added. Dec 11, 2016 · 2230 posts · Joined 2005. Inspect the fuel filter – A clogged fuel filter can restrict the flow of gasoline to the engine, resulting in engine surging. Mar 21, 2022. Recently it started having this "rpm bounce" , about 100-200 rpm when driving about 40-50mph. If anything it does it in opposite scenario. 5 posts · Joined 2023. to as much as 6 to 10 sec. It got so bad before when i put it in reverse the truck bucked and stalled. I also picked the injector harnesses, all that changed was the balance rates slightly. Start cheap and simple for causes of black smoke on acceleration: * Check for dirty air filter. Jul 16, 2015 · I have an O4 Duramax and am having a terrible time with surging at idle and while driving down the road. Noticed it was around 800rpm it did it. My CEL is not on at this time and i havent had the change yet to check for codes but will tomorrow just trying to get some ideas what it could be. 298 posts · Joined 2015. It has 1800 miles on it. THe engine makes sounds like it revs up a little then comes back down also while driving around 30MPH the car starts like bucking and sounds like its surging too under very light acceleration Aug 8, 2023 · Shudder/Surging While Driving: Chevrolet: 21-NA-047: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed: Chevrolet: PI0700B: Shudder Feel While Driving in 40-50 MPH Range: Chevrolet: PIP5337: Shake Or Shudder On Acceleration: Chevrolet: PIP5337B: Shake Or Shudder On Acceleration Dec 1, 2017 · 1999 - 2003 7. #17 · Jul 13, 2016. 7-6-2011. Gm Dealership put a brand new ECM in when it did it the first time. Oct 13, 2010 · #06-08-61-003D: Underbody Pop or Clunk Type Noise While Turning or Driving on Uneven Road Surfaces (Install Body Mount Insulator) - (Sep 10, 2008) Applies to 2004-2008 Chevrolet Avalanch, Suburban, Taho, Silverado (Classic), Silverado. 2000 Z71 5. Once it starts this it starts surging while under load and driving I replaced the vgt sensor and solenoid in the turbo and Mar 9, 2022 · Sometimes you can clean the MAF which can help but we have found replacing the mass air flow sensor is best. Dec 25, 2011 · 1326 posts · Joined 2011. Jump to Latest Follow Apr 15, 2024 · Surging and smoking problem. While I'm driving and have my cruise set, going down a hill my truck kinda surges a little bit like the transmission slips just a little. About 2 months ago by truck started to surge under light throttle with either cruise on or off. Sep 18, 2016 · 2009 GMC Sierra 2500 LMM, Cognito UCA, TRUXXX Keys, Bilsteins, Sulastic Shackles, 20x9 BMF S. This truck has about 2500 miles on it and for the past couple months it has randomly started surging or fluctuating RPM's at idle. Sent from my iPhone using Tapatalk Pro. I have had the TPS relearned, new air filter, MAF and throttle Apr 10, 2015 · Maybe on the sending units I'm not sure. On my lly had the issues of ran fine when cold but when warmed up would limp mode when accellerating. I have a 2005 LLY that's having weird intermittent rough idle and intermittent surging. Hi everyone, I got a 2010 5. I drove it about 600 miles on a road trip last December and after about 5 hours of driving highway speed, I started to notice a stutter or almost a missing as if it were misfiring type of feeling (realizing this is not possible in a diesel) and it only happens at 1500 RPM at May 2, 2018 · 2018 L5P 3500 stumbles. However, when accelerating to highway speeds, you notice that the truck will intermittently jerk. Late-Model Diesel Solutions For Cummins And Duramax Owners. If the actual drops below the demand, its your fpr. Other times, I'll be driving on what seems to be the same surface/texture of road and it will start. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. $320 Canadian later inswapped the alternator out and added 2 extra (2 guage) grounds. It has 146,000 miles on it. Injectors were replaced in August of 2009 at 98,000 miles, so they are relatively new. Replace the filter first because its cheaper and replacing it can never hurt, but if it just suddenly started this, sounds like a fuel pump. As stated in the video, there are several things Jul 25, 2010 · Even after driving to a friends house it stayed super stable with no hint of surge. Dec 2, 2009 · Tow Master. Kind of feels like it runs out of fuel or it doesn't know what gear to be in. While these engines are still relatively new, they seem to be extremely reliable so far with very few “common” problems that haven’t been solved or addressed. While in park truck will idel fine no surging of RPMs. Sep 6, 2020 · The most common reason your truck shuts off when driving is a lack of fuel. 0 cold surge. During light acceleration and at low speeds (city driving 35 mph or so) the truck seems to run fine. The one guy had similar issues with the electronics while driving he said it was almost like the vehicle was shut off and restarted in a split second while driving and he also has starting problems. The surge and light flicker during idle is about a 1. The first usual suspect is the Filter head. The rpms are low since the truck is in its 5th or 6th gear, typically around 1000-1500rpm. O. I have read a good bit on here and some other sites. then close it once you see just fuel and no air. 99. #1 · Nov 4, 2023. Nov 24, 2018 · 2. Then lost all throttle response. Unfortunately soon after, i went for a drive and it came back just like before. There are 2 main causes of the 2017, 2018, 2019, 2020, and 2021 L5P Duramax Turbo Surge. Do a double dump (drain and fill (change the filter) run a couple hundred miles, then drain and fill again). Then go away. 2003 2500HD 6. I pulled over , checked my tires. He knows better than to put gasoline in it, he did say that he put 5 gallons in after it died and primed for a while, he said it got firm then immediately soft. 5 to 2 second surge cycle, but as soon as I apply ANY throttle, the flicker and the surge kicks to about a . Hi There's air going in the fuel systerms. After I went through and changed the filters out I suddenly started experiencing surging. I’ve tried all 3 H&S tunes along with the stock tune Dec 8, 2019 · Isn’t really downshift no. May 30, 2013 · I put an after-market kit on the truck. #1 · Jan 31, 2010. In addition, when cruising at highway speeds, it Mar 21, 2022 · 1. If I let off a little bit it will do it then. Feb 20, 2010 · 341 posts · Joined 2008. #1 · Jul 15, 2013. You can even see the rpms jump around a little. Dec 15, 2013 · 54 posts · Joined 2011. The engines RPMs seem to bounce back and Mar 20, 2017 · Anyways, to the point. 25 second cycle (much Jan 16, 2016 · 4. Built Motor: Fingers, Carillos, NGM AF Cam, Ported Stock Heads, Trend Feb 27, 2007 · 925 posts · Joined 2007. Any chance he put gas or he could of gotten bad fuel. Idle surge is a characteristic of a failing FPR. French Creek, West Virginia. Fuel Injector Failure (#4 Injector) Finding 3 problems with the L5P was difficult. Jan 16, 2016. Jun 10, 2013 · It is better but still not right, it will at least idle now and is driveable. Only at idle, nothing noticed while driving. RPMs drop when it happenes for an instant then resume normally. The most likely cause is an empty fuel tank aided by a fuel gauge that’s not as accurate as it looks. From visual inspection the fuel lines seem fine. 2005 Chevy 2500HD LLY CCSB 951/1601 "DURMAXN" . While driving down the highway at 70 mph with the cruise set, I used the left turn signal to change lanes and everything Oct 7, 2021 · Surging well driving. I've swapped a known good FICM and Oct 3, 2014 · The next day, while driving through town with no trailer, the same thing happened again, very briefly. I figured it was bad fuel, so he's out now getting a new fuel filter (he will be replacing one that is less than 2 Mar 13, 2022 · What’s Coming From Ford: 1,200 lb-ft of Torque Power Stroke Diesel Engine. the predecessor CP3 found on LB7, LLY, LBZ and LMM engines). #8 · Dec 13, 2016. the problem is best described as a surge but only at idle or when driving at a steady speed!i used EFILive scan and watched the rail PSI and noticed that the desired and actual both surge with the engine surge,its as if the computer calls for more PSI then all of a sudden it drops again Mar 1, 2021 · Inspect all of your fuel lines, looking for any corrosion, weeps, leaks, etc, and fix any found. Oct 22, 2013 · It causes boost issues because the egr gate itself cannot stay in its commanded position. Mar 14, 2011 · So I bought my truck about a month ago 105K 2005 LLY RCLB and just recently it started rpm jumping when in park or in drive at idle. Jun 16, 2016 · NortheastDenali. then pump the pump once or twice it should get hard to pump where can't pump any more. 1 post · Joined 2017. It is like the plug was pulled out of the wall. Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. Becauae the surging only starts when the truck is complelty warmed up. 3 light acceleration surging and stutter - Hey, Im new to the forums on the posting side anyway, I have relied on them in the past for my other trucks, so thanks for all who have contributed! Ive been searching hard for a thread that has symptoms my truck. Automatic transmission. If your truck is surging while in power with a load on it, I would look at a few other things. If your fuel pump is entirely gone, your truck won’t even start. #3 · Aug 19, 2013. Sep 15, 2021 · LMM bucking surging HELP!!!! So ima try this again thought a shop found the problem but wasnt it. I’m not sure why GM can’t do injectors right. Jun 18, 2012 · I have a 2005 GMC Sierra with the 5. duramaxnewby Discussion starter. The first is rooted in a protection setting and can be solved with t Mar 26, 2021 · 3. Seems to be getting worse. 5 died while driving! Saturday I was on the highway cruise control on 80MPH. 226 posts · Joined 2016. #1 · Feb 20, 2010. Jan 2, 2014 · Apparently the sensor was going bad. while getting on the freeway at 35-45 mph relatively light acceleration truck stumbles I cant tell if its engine or trans caused. Jan 27, 2019 · Sawtooth. From a thicker crank shaft, to a more advanced turbo, and pistons that can handle more Feb 11, 2015 · When you are out driving, and after it's warmed up to temperature, stop. When driving, slightly accerating, the truck is doing about 1100 rpm in its 6th gear. 3L Power Stroke Diesel - 2000 7. #16 · Oct 26, 2018. I bought two 2016 Chevy 3500 Diesels off the lot in November (well two different dealerships, long story). I was going to say sounds like injector issues to me and GM has a real big problem on their hands as tons of trucks are having issues. Increase in 200 RPM max for about a second. Another day passed with no problems but the following day, with the trailer in tow, we were unable to get more than a few kilometers before the truck lost power again, on the first hill, and started belching out black smoke from the exhaust. When it dies the service traction, service Jan 14, 2013 · Not sure if its the transmission or not, but I'm thinking it is. injectors where replace at 65,000 and again at 100,000. It seems to happen primarily when traveling between 45-55mph. Nov 4, 2023 · cmyers106 Discussion starter. Also it would be a good idea to check the balance rates on your injectors to make sure all them are good. The computer checks a bunch of different things like the doors, steering column, and igniton key to list a few. The three FPRV fixes are installing a FPRV shim kit, replacing your FPRV with a race fuel valve, or replacing your FPRV with another OEM FPRV. 139K. Hey guys, my 2010 5. Jun 22, 2007 · Dan. So I was on my way to grab some lunch today and went to make a left and truck completely shutdown. I have a 2002 Chevrolet 2500 HD w/ LB7. Got coasted off side of ramp. New 3500 Denali bought new about 2 months ago. *2006 2500HD SLT, LBZ, 4x4, Auto, ex. Nov 23, 2018 · Disconnected my batteries and the alternator would fluctuate driving a few city blocks and killed my radio and had the warning gauges flash. But it’s small enough doesn’t make torque go to wheels generally. Feb 2, 2020 · Power surging at highway speeds. Silverado 1500 High Country 5. no more air. knotReally, corneredge and Tex Findlay. 5 LB7 Forums. Most Chevy’s have a spark plug replacement interval of 60,000 to 80,000 miles. When a spark plug goes bad it can cause cylinder misfires, rough idling, and acceleration issues. 2008 GMC Sierra CCSB. may have even just been a fluke. Same thing but less drop than before. I also noticed a little smoke behind me the other night when accelerating to get ahead on the highway. If you have any way to check, look at your demand vs actual fuel rail pressure. I recently started having problems from my 2004 lly duramax. I have tried the fuel additive Diesel Kleen didnt have much affect on the surge. 3L H. Aug 10, 2010 · Surging Cruise Control. I have a stock 2019 L5P with 100,000 miles on it. There are three relatively inexpensive ways to solve a poorly working Duramax fuel pressure relief valve. 1. My cruise control does not hold a constand Engine Load %. Brake switch won't matter unless they've changed since the LLY/LMM. #8 · Dec 25, 2011. Sep 5, 2022 · With the L5P being the newest Duramax engine on the scene it's also one of the best performing right out of the box. The FICM harness rub issue has been checked and addressed too. Jul 29, 2019 · L5P RPM surge during decel. Aug 16, 2012 · I ordered mine from gillett diesel. 5 LB7 Mar 17, 2022 · CP4 High Pressure Fuel Pump Failure. I have an 02 duramax and it surges while idling. (Easier to see light fluctuations. A 2000 GMC Duramax 2500HD 6. tailpipe and look at the color of the exhaust fumes. 6L. While driving at low and high speeds RPM's surge up and down. (bc it was cracked). Idle surge while driving. 6 lml it has a fass lift pump the other day I stop by the gas station and left the truck running when I came out I noticed the truck “surging” it was jumping from idle (around 640 rpm’s) to about 750 rpm’s and right back down it only done it that bad just that one time but now the truck is surging sometimes while I’m driving down the road as May 22, 2017 · Chevy / GMC Duramax 04. . by the time I got back to my driver door I realized the truck had shut down, wouldn't start back up. Sep 22, 2012 · So I have a surging issue with my LBZ. My LB7 is surging about 2 to 400 rpms constantly whether in idle or while driving. Usually only 200 maybe 400 and lasting 1 sec. #4 · Jan 27, 2019. Truck has 136,000 miles. Rough idle for a few mins then another quick RPM increase then back to normal. Has roughly 210,xxx on it right now. Had it to the dealer four time but he has been unable to correct the problem. 3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. I recently acquired my first diesel truck. #5 · Jun 28, 2017 (Edited) Normally Surge/Lope at Idle is a Fuel pressure regulator (FPR) But yours is at when slowing down and sometimes at slow speeds. * A power increase tune. Allison 1000 Transmission. #1. 5 2500HD which has an over sensitive throttle. CP4 Failure. Jul 31, 2013 · Rpm surge bounce-----need some real help. I have a 2020 2LT Silverado that began having cold weather surging issues last Dec. Get out and walk around to the. Lol. Then change every 30K. Chevy / GMC Duramax 01-04. The truck starts and idles without an issue. Over the past few months I've noticed a knock, dont think it is rod related as it only does it under load. plugged,5"MBRP straight,S&B intake,pipe,6"MBRPTip,Gutted magnaflow cat,AFE MP,EGR blocker, slipyolk,Edge CTS, TransGo Jr,Pro Fab Performance downpipe,AFE IC pipe,Nicktane/donaldson ,FPR plug,Mhale LB7 pistons, LMM rods, clevet Sep 23, 2018 · Since it mounts to the CP3, its a no brainer. J. It is an automatic. Mechanic came to look and isn't throwing any codes! Aug 19, 2013 · 262 posts · Joined 2013. Engine was at idle. Guess same reason Ford can’t figure out brakes and comfortable seats. 2 doesn’t possess the same track-record for reliability. It also has Diamond Eye 4" exhaust, AFE Stage 2 Intake and is currently driving on 16" 285's. Unlike the ultra-durable CP3 that came before it, the CP4. It continues while driving regardless of coasting, cruising or under throttle, albeit not as noticeable the farther the pedal is pressed, even cruising. having trouble with a 2002 LB7/Allison. Aug 29, 2013 · I have a 2003 lb7, bought it about a year ago. Seems to repeat this process every few mins. For the first 2 week of owning it, everything ran amazing. Jul 7, 2021 · With mine you can stand on the running board and feel it shake you. about 1500 miles ago i noticed my turbo was starting to surge when cold then it would do it every once in a will when warm i put my boost controller on and it helped a little but still surging was wondering if anyone else had this prob. 2 and 10speed. Dec 12, 2020 · How to Fix your LLY Duramax Fuel Pressure Relief Valve (FPRV) Problem. But it does occasionally hiccup at idle and driving. Mar 24, 2011 · I have a ppe duramaximizer on it and for a while I had a bully dog triple dog power pup stacked with it on the economy setting (I did turn it up a couple of times playing around) but the chips just make the knock after acceleration louder so i pulled the bully dog off and the ppe is currently unplugged because the switch is messed up. Jul 28, 2021 · Bad Spark Plugs & Wires. It's not enough to change the MPH but the change in engine load can be heard and also seen in EGT temps Nov 17, 2018 · If your LB7 is loping/surging at idle, especially when in drive, this is one possible solution to your issue. When driving on completely flat roads in NW MN with no wind, the Engine Load % displayed on my Edge Attitude CTS varies by more than 10% in a repeating cycle. I recently changed the FPR (OEM Bosch) a few months ago and my desired FP is matching to actual pressure. Jan 21, 2013 · Only the main fuel pump (cp3). Does it at speed (ranges low to high) most times, but has happened at idle in gear! Can be strong or mild, when hard it thunks the whole truck. Jan 1, 2018 · I have a new-to-me 2014 GMC sierra 3500 DRW. Mar 8, 2020 · I too am experiencing an issue with my truck, a 2013 Silverado 2500HD Duramax 6. 08 lmm exhuast deleted, efilive tune, lift pump, after driving down the interstate for 10 minutes or so on a hot day when you exit off and come to a stop truck starts bucking and sounds like its knocking if you let it do its thing for a few minutes Nov 6, 2022 · Not sure about the 10spd, but the 8 and 9 spd's had a shudder problem (with TSB's) at light throttle and between 20-40mph, usually 3rd or 4th gear. Jan 31, 2010 · Duramaxxed06 Discussion starter. 1,2-10" Kicker ,PCV reroute,Res. The truck will stop but jump forward, almost like someone is hitting me from behind. It starts and runs fine, cold or hot. CLICK HERE to purchase our LML CP4 High Pressure Fuel Pump Failure Kit. 2 high-pressure fuel pump (vs. 38. 3L w/6 speed w/66,000 miles. It will only happens randomly but once it starts it will always do it on that key cycle. 5-05 LLY Duramax Powertrain Idle surge while driving. Hardly noticeable though. If it makes a hollow sound, it’s probably empty. May 25, 2011 · Chevy / GMC Duramax 04. Jun 23, 2014 · I'm new to the Forum but all assistance would be greatly appreciated. (but not horrible) boost is about 21psi, egts are 1200+/-. When checking balance rates, at idle, all injectors intermittently go to 0 Sep 8, 2017 · It randomly dies when the engine is at idle speed, it doesn't matter if it's in park or drive, hot or cold, driving or not. I have changed the tstats, temp sensor, and fuel filter mounting. I was driving thru the campground so you have to go like 5 mph. The boost gauge on the Mini Maxx will jump from 5lbs to 9lbs and back down with in a few second. #6. You really need to get a GM scan tool (with a good tech) and start diagnosing the modules - something is going on, perhaps one of the modules (ECM, BCM, etc) got toasted with the low voltage, but you won't know for sure until diagnostics are done. More recently over the past 2 weeks, I've changed my fuel filter, NAPA Gold to be exact, since I've changed it, it surges at idle. Apr 6, 2014 · I notice my truck started surging on the highway around 70mph regardless if the cruise control is on or off. 3 4x4 with 306k currently. Replace if needed. I turned put it in neutral, turned the key off and back on and it started right up. However once the engine was at operating temps it stopped. Sep 21, 2017 · When accelerating with light-med throttle and shifting right around 2k rpms, it accelerates quicker right before it shifts even when I keep the pedal very steady. Once it gets a bit warmed up over 150-160 degrees, it starts a bit of a slight surging. Even if it indicates there is fuel in there, bang on the tank. No codes. 5-05 LLY Duramax Powertrain Missing or surging while driving at like 55-65. It feels almost like it's misfiring and losing power. It's not throwing any codes, so thats no help. #11 · Oct 1, 2007. Feb 8, 2024 · I have a 2011 gmc Sierra 2500 with a 6. So when the turbo builds boost it blows open the egr gate and drops boost, or in my case just flaps in the wind and causes the turbo to compensate (surge) Your best bet is to just delete it or block it. This can be confirmed by reading the value using a scanner and Mar 18, 2011 · I recently bought a 2002 GMC sierra with the 6. A. MAP Sensor Failure. Mar 1, 2023 · Now today while at idle (600rpm~) the truck gets a bit of a quick that you feel with a slight RPM increase then drop. May 13, 2024 · Check the spark plugs and ignition coils – Worn or malfunctioning ignition coils can also be the culprit behind engine surging. Since the fuel pump ensures the engine is getting enough fuel, a bad pump can cause a lot of issues with how your truck runs. PERFORMANCE: Edge Insight , AEM Bruteforce dry flow air intake. Oct 2, 2020 · I have a 2019 Sierra AT4 with the 6. That lasted about 1200 miles, now it's doing it again. I am having wheel shake. The second guys truck acted like May 10, 2010 · It's happened to me twice now seems like after a long trip I'll shut vehicle off for a while n when I go to crank it back up it runs for 10 seconds or so n then dies n won't start back up. D. . I am thinking that it is a loose connection somewhere but have no idea Dec 16, 2016 · 2015. #1 · Dec 15, 2013. #duramax #surging Sep 3, 2007 · 2 posts · Joined 2007. T. The entire engine dies, no power, no gas, no power steering, dead. hey guys, i was on a road trip the other day and went to pass a car, and the engine appears to be surging when at full throttle. And chevys love to tear up fuel pumps. 04. Bad spark plugs are one of the leading causes of a lack of acceleration in Chevy vehicles. jrmccain. If you find a problem, it is best to pull the fuel tank and clean everything real good. Sometimes I attribute it to a certain section of road as it happens in the same place no matter the speed. It also takes about 1-2 seconds longer to start then normal. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Like. 6 duramax (LB7) all stock (no mods) Like. I would drive down the street 1/2 miles from home and at the intersection the engine would surge to 1000 rpm and then back to 400 repeatedly. wash off the top the filter. Then finally it started to respond. There is probably a broken sensor somewhere causing the light to come on. Were truck sat idling in gear mash on throttle up and down, engine rpm didn't change a bit. Feb 18, 2019 · It appears pretty well stock other than an aftermarket exhaust system. 59,115 miles. Low speed surge. If you hit the pedal a little and let off you should hear the post injection event. Sep 24, 2012 · Symptoms: hard surging idle while cold, surging while on throttle lightly, goes away at interstate speeds, also clears up randomly while driving for long periods of time, harsh cab vibrations, clears up if i bleed the air out of the fuel but then randomly begins again while idling or moving. It's either a Blackish. 5 GMC Sierra 2500HD SLT LLY, 4X4 CCSB, Bill's Custom Intake Stage 4, S&B Powerstack filter,LBZ MP, 4" turbo downpipe into 5" exhaust, 7" MBRP tip, EFI Live w/ dsp5, Resonator plug, PVC rerouted and plugged, level kit, 33" BFG's, all-on mod. Love the truck!! But here recently it has started a surge when driving. Oct 16, 2014 · I have this intermittent issue with the truck surging forward when I am coming to a stop. 36. The actual and desired rail pressure do track together better now. Travelling over a rough road at low speeds causes slight changes in throttle pressure which in turn causes the surge. Nov 27, 2010 · LB7 Surging Issues. Local GM dealer was able to reproduce the Mar 6, 2018 · Lml stalling randomly at idle and while driving. It's not real significant but it's enough to bob your head back and forth slightly. Jun 2, 2021 · Duramax L5P Engine Problems. Missing or surging while driving at like 55-65. This problem does not cause a trouble code because the sensor is still within its parameters, the value the sensor is outputting is just not correct for the engine's speed. This iteration of the Duramax engine has been redesigned in all the right ways. Jan 10, 2013 · White,06,LBZ,GMC,CC,SB,SLT,82,***miles,17"XD Misfits,305/70-17 Terra Grapps,Leveled Cognito Balljoint UCA's,Alpine deck,Kicker ZX500. 6" Zone, Lowering keys, 2" Blocks, 20x10 -21 Eagle Alloys 33/12. Slammed '62 Ford Country Squire Sporting a 900hp Diesel Swap. When coasting to a stop from ~30mph (any speed as long as the transmission is in 2nd gear or higher when beginning the decel) when the truck is around 15mph, the RPM begins to surge 150-200 rpm. 418 posts · Joined 2009. My truck randomly shuts off at an idle and while driving. #1 · Feb 27, 2007. Then figure out how to fix it. You can also hear an exhaust tone change exactly when the surge happens. Next, pump up the fuel primer button on the filter head and let it sit (preferably overnight ) and recheck. If the Primer button is soft then you have an air intrusion/leak. Feb 27, 2010 · LB7 idle surge. cab, 8' bed = Hotel Sierra. Jul 15, 2013 · 61 posts · Joined 2010. Would apprieciate any help. Tested again on highway lastnight. 5/20, 2" BORA Spacers. I purchased a brand new 2019 2500HD Duramax and at 1200 miles I noticed the engine surging during decel. 01-04. Smoke (RICH with Diesel Droplets, burns your eyes, and easily to sniff. nwccovydoxhrbupgdkhl