Lmm duramax rough idle Can defiantly smell the fuel The truck is completely stock 160k miles Nov 7, 2016 · The FICM harness can be a problem for the 04. first guy told me it was injectors, did that and same thing. It smokes white with raw diesel while doing this. From gm is about $800. I put new reman Bosch injectors and a new fpr. Dec 17, 2024 · 04. The truck really doesn't shake that bad, but the transmission has a hard time figuring out what's going on. The idle wanders around from 580-700rpm, actual fuel pressure is 4500-6500psi, it's bouncing the truck around, its terrible. 5-2005 (LLY) Engine miss---No Codes. 1 10 2005 Duramax Rough Idle Dec 26, 2015 · If you Google (Duramax Fuel Pressure Regulator replace) there are some YouTube vidios on LlY's most ikely the same. Last night I pulled up to a stoplight and noticed it was idling a little rougher than usual. 3 powerstroke (loud injector/injection pump) until it warms up Fuel pressure when this happens is around 12k Should be around 4-5k Oct 24, 2021 · With all that it still has a rough idle that i cannot read balance rates with unless it's in drive, it puts out a good amount of white smoke when I start it up in the morning and when I accelerate past 2400 rpm it sputters. 5 lly with stick. 5 lly, edge programmer, air raid intake, 4" pipe from turbo back with a gibson muffler and no cat, Egr block off plate installed and fingerstick. I have a Lmm duramax swap that I am having high fuel rail pressure at idle 12-18k. 5K views 11 replies 8 participants last post by TORCH Sep 2, 2009 May 18, 2020 · So, I have been getting a rough idle and a shake on my 08 lmm during start up usually when the air conditioning is turned on, but It smooths out with throttle and doesn't last long. 2L V8 engine (RPO L87). Airdog fuel pump, and engine fuel filter delete. It only happens sometimes too, its not all the time. 5, replacing the LBZ due to tighter emissions regulations. while i had it apart, I swapped chargers to a 68mm fleece cheetah vgt, and billet push-rods. The rough idle clears up in drive, out in park and neutral it stumbles and surges a bit, not enough to really move the tach needle though. Dec 21, 2024 · There is a lot of opposing views on if it's okay to idle your duramax. (8 to 10 mph or near 1000 RPM), acceleration fuel knock noise at 1700 to 1800 RPM, rough idle, white Feb 13, 2011 · Started having diesel in my oil so put in all new injectors and lines. still rough idle. 5 Chevy 3500 duramax with Edge Evo Race chip, straight piped from turbo downpipe. The only modification to the motor was adding the LBZ mouthpiece. Kinda of like a small miss. Balance rate at 11 for cylinder 4. Any input on this? I have YouTube video linked. 6 to 13. I've been running EDGE Race on level 3 w/ the DPF gone. It doesn't do it all the time. Jun 22, 2023 · Continuing problem may be resolved by making sure the fuel filter itself is tight enough, and the WIR (water in fuel sensor) attached to the bottom of the filter is tightened enough. 5-10 LMM Duramax Powertrain P0088 Rail pressure too high. Stopped an hour later after driving through more rain and shut it off for about twenty minutes and it started hard, took about 3x as long cranking as normal. 3L V8 engine (PRO L82, L84) or 6. I ran into this in SD. Be sure you insulate the harness from the bracket, as the whole problem is the FICM bracket has a sharp edge and cuts into the wires. Mar 26, 2022 · Good to keep in mind as a possible cause of rough idle. 5 lly Duramax with about 208,000km (129,245miles) and the truck will sometimes idle bad (lopey) when in drive or reverse, it doesn't do it in park and has a whitish grey smoke when this is happening. 5 (LBZ & LLY) Top Contributors this Month Sep 5, 2012 · Black 04 LLY 6" Tuff Country EZ Ride. 5-05 LLY Duramax Powertrain No balance rates, slight miss when warm Finally got it in use and have found it has a rough idle when warm. temps in 45-50 degrees. figured it was a dud injector, sent it back got a new one. 35-12. pcv re-route, LBZ inlet and S&B, EFI Live! Mar 14, 2011 · 6. Could put it up to 26k desired and 21k actual at full throttle from Tech II. Mar 18, 2012 · I have a 2005 lly that has a rough idle after doing a head gasket job. Jump to Latest Apr 19, 2015 · Duramaxdiesels. approx a month ago it developed a rough idle/ white smoke/ fuel knock issue that was intermittent, after bringing it to the dealer the issue was fixed under Jan 1, 2013 · Mark 2008 LMM Chevy Silverado 2500HD LTZ MBRP DP MBRP SS 5" TB Exhaust Edge Insight CTS EGR Blocker EFI LIVE V2 DSP 5 Fumoto Fuel Filter Access Door Aluminum Bleeder Nicktane OEM Adapter Firestone Air Bags Toyo OC ATII 285/70/17 Chrome Boulder H2 Line X Weather Tech's, PCV Re-Route, DDM 6k HID Lows & Fogs. 5 GMC Sierra 2500HD LLY/Allison M74, Summit White, CC/SB SLE 4x4, Leather, Westin Nerf bars, DiabloSport Predator 2. But if I am out on a job for a couple of hours and then restart it happens again. Within 100 miles it decided it still wanted to go into reduced power mode. Fuel rail pressure still reaches 23k and stays very close with the DFRP. The vibratin does not change if the truck is in drive, park, neutral, or reverse. Second the truck has a surge at idle once it’s been driven for a while, doesn’t always happen. The truck also cranks a slight bit longer but does fire up in a normal amount of time. 3K CEL P1227 Rough idle. 2005 Chevy 2500HD Duramax LLY BANKS ram air intake, MBRP 4" exhaust, CAT DELETE and NO MUFFLER, EGR Deleted, Fisher Jul 25, 2012 · 2016 White High Country Duramax PPEI ECM and TCM Tunes 5" Flo Pro, Fass 150 and Beans Sump Edge Insight CTS2 TRS 5000K HID's, TRS Fog Lights Cognito 4-6", 325/55r22 Nitto Trail Grapplers, 22x12 Fuel Forged FF19 SOLD: 2011 Chevy 2500HD LML Black SOLD: 2008 Duramax with lots of go fast parts Nov 6, 2012 · It is a 04. 5-05 LLY Duramax Powertrain LLY LOPEY IDLE. The weird thing is no codes were thrown. Put on a new harness on the #6 #8. The motor sounded very "airy" and as if it was about to stall out. 5 is what should be showing on an LLY and with those numbers the truck runs great. 5 (LBZ & LLY) Top Contributors this Month Feb 21, 2017 · My '05 lly is hesitating or chugging while on incline or letting off the accelerator. As is common with emissions equipment, this led to a new common problem for the Duramax LMM engine. 0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morningSatan shudders & says "Oh shit, he's awake!" Sep 27, 2014 · Chevy / GMC Duramax 07. Jun 15, 2010 · I have a 2004. It's straight raw fuel. The reason I say this is because I have the exact same issue as posted above, and my balance test came back with a CFR of 3mm3. Drove it to Midland and back no problems except idling when it has sat. Nov 30, 2011 · the truck is 04. May 18, 2010 · 6. Nov 4, 2023 · I have a 2005 LLY that's having weird intermittent rough idle and intermittent surging. Jun 4, 2023 · 07. Previous owner replaced injectors at 120,000 with injectors from Lincoln diesel. The most common culprit is a tiny air leak in the fuel system somewhere. Apr 16, 2018 · Having a couple problems with my truck. 4 balance rates won’t read (all read 0. I got the same symtoms as you. another guy told me cp3, did that and same thing. me, has 197k miles, EGR delete, Bully Dog tuner and Insight CTS3, no other upgrades. Really could use some help here guys. 5 lly rough idle . He just bought it from a dealer who told him they had just put head gasket(s) on it. LMM duramax idle issue at startup Apr 16, 2018 · Other problem is once truck is up to temperature idle is very choppy and slight loping. Jan 4, 2012 · 6. Desired rail pressure is 4. Jump to Latest 181 - 200 of 229 Posts. Apr 19, 2020 · 6. Aug 13, 2012 · Black 04 LLY 6" Tuff Country EZ Ride. I am sick of the rough idle and the smell of raw fuel along with the 6k plus that has been tossed at the truck. Jun 12, 2007 · My 2005 LLY recently started exhibiting a problem: very intermittent, very rough idle. From research first guess was filter head or FPR. 0 compression on cylinder 4, the rest are good around 250. Jump to Latest 6. 5 lly and its back together now and running, except its very rough after the first day out working out the bugs. Jump to Latest 4. 07. It does run as you can hear in the video and will drive down the road if needed. 5 lly duramax and recently when I come to a stop i have a rough idle and the exhaust will spit out white smoke. I LLY rough idle 2005 LLY with 2019 reman motor 80k miles Injectors got about 25k New FPR First, sometimes when I’ve started the truck it sounds like a 7. Regulator can, but you need to be able to look at information with a scan tool to see what the actual and desired are doing, plus look at other things to see if its even related to fuel pressure. 2L Diesel Engine Duramax Third Generation: 2006-2007. Doesn’t seem to have a lot of fuel in the oil (paper test pic). any one else had this problem with lly. Mar 28, 2022 · It’s not super rough. Only at 170 degrees or more, anything under and it runs perfectly fine, it’s been doing this for a while now, I changed out the turbo , 8 new fuel injectors, and new cp3 . Also when you Google what I gave you it brings up all the other diesel sites that are more helpful than this one. The whole truck shook. 5 (LBZ & LLY) Top Contributors this Month Jun 14, 2010 · Rough Idle - Temp Sensor. It will not do it as much in N or P but when I am in gear at a stop light this will happen. Dealer said all checked out good, even the injectors, but the fuel reg seamed to be giving inconsistant readings. Can't for the life of me figure Feb 16, 2015 · Only thing you can do is get it to run (idle), and let it idle for an hour or so. Like I said, no codes, no white smoke, just a rough idle and the fuel economy hasnt dropped at all. It only does it at first start of the day when it’s cold and Once it’s warm it runs great and it doesn’t do it. She turned over for about 2 seconds before starting, but the idle on start up was really rough, sort of abnormal and like a Harley. Drive it around your house until you feel confident its not going to gel. That reminded me that I had the same issue on my pre-Duramax trailer hauler, a 95 Suburban C2500 with the 454 gas. 5 (LBZ & LLY) Top Contributors this Month Jan 12, 2009 · Dark Mode; Light Mode; Menu Log in Dec 3, 2012 · 2009 GMC Sierra 2500HD SLE CC/SB 4x4 LMM EFI Live, Edge Insight CTS, Flo~Pro 4" DP back exhaust w/ muffler & stock trumpet tip, Alum. Jul 7, 2021 · I just bought a 2021 2500 Duramax and have noticed at idel while sitting in the seat I notice a small shake in the truck haven't lost any power and am only at 700 miles. To strengthen emissions active regeneration was added alongside a DPF system. Rough Idle when warm. My fuel filter went about 17k (I had the wrong mileage written down) so I changed it out tonight (I only run Racor filters). 5 LLY/Alli CCSB. 5 (LBZ & LLY) Top Contributors this Month Jan 15, 2016 · lly duramax rough idle Jump to Latest 1. It almost sounds like a lope tune lol, but the truck shakes and gets bad mileage. 4K views 11 replies 2005 2500hd LLY Duramax. 5 at idle but it didn’t do anything to smooth it out. The truck is fully deleted, but stock otherwise. 3 powerstroke (loud injector/injection pump) until it warms up Fuel pressure when this happens is around 12k Should be around 4-5k. He said that because there is no extreme fluctuation at idle and no fuel surge that it was very unlikely regulator is bad. Not all the time and always after about 1 minute of starting in the morning. Feb 17, 2015 · Got a 2012 LML Duramax with a white smoke issue. Bad diesel, rough idle, white smoke and NO Mar 23, 2014 · 6. May 27, 2017 · Most any scan tool can read the fuel rail pressure- desired and actual. Starts up fine with no smoke and runs great with no issues. injectors were sent back to S&S because #2 balance rate was 4ish. I replaced the injectors because it had a rough idle and smoked white. LMM rough idle when sitting. 5-05 LLY Duramax Powertrain. No Codes. On first start up truck runs rough for a few minutes. The sensor was similarly placed on that engine. 5 (LBZ & LLY) Top Contributors this Month Nov 30, 2011 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w Sep 5, 2009 · 6. And now for the problems listed; 1. Can't feel it when accelerating, but a definite hesitation when getting into the gas pedal. 10 miles down the road the truck started losing power and went into reduced power mode. 5 LLY with ppe standard set on level 4, CAI, straight pipe exhaust. 5-2005 (LLY) 6. Most gauges don’t work, so I bought the CTS3 last week bc of other problems (another post- P0045). truck runs excellent just crappy idle. Apr 13, 2014 · 2006 GMC Sierra 2500 HD SLT ECLB, LBZ, LED tailights, black turn signals , black aftermarket headlights,265/75/16s uniroyal larados,Bilstein shocks,Banks 4inch exhaust, Nicktane adp, with a 3 micron Donaldson fuel filter, Schaffer's oil, pcv Re-route from alligator performance, Nicktane race plug, GM cab light,Banks 3 inch boost tube,And S&B air intake good to be driving a diesel again. Jump to Latest Very bad hesitation & rough idle. 06 LBZ 2500 350,000mi 09 LMM 3500 Cutaway 700,000mi 22 L5P 3500 DRW. Apr 8, 2015 · 2016 LTZ, Stock (for now) OLD - 2005 GMC CC/SB - LLY - aFe 4" Turbo Back - aFe MP - Engineer837 Secondary Cooling System - Earl's Tranny Cooler - ISSPro Boost & Pyro in a Triple pod with Insight CS controlling Tunes by IdahoRob - PCV re-route, EGR blocker plate, Clarion NX500 head unit - Hi, Lo, & Fog HID's wired for All on. 5 lly duramax and was having issues with a rough idle at stop lights and while in reverse. Oct 19, 2014 · My truck-2006 Chevy 2500HD LT3 CCSB 4x4 LBZ, EFI Live V2 w/ DSP 5 by Rob, Edge Insight CTS, EGT probe, Transgo Jr kit, 5" Diamond Eye exhaust w/ 6" stainless tip, plugged resignator, EGR blocked, Fiberglass dual ram air hood, Goodyear Duratrac AT 285/75/16's, American Outlaw Buskshot Chrome wheels, towing mirrors, LineX bedliner, Reese 16K 5th wheel hitch, gooseneck hitch, B&W 3 ball hitch Mar 6, 2020 · When my truck gets to 170 degrees it has a rough idle in park or nuetral. It runs rough for about a minute Mar 4, 2019 · 6. Oct 24, 2024 · Truck idles rough with a lot of blow by into the crank case. Hit the highway and it knocked while accelerating, just once for a second or two. While rebuilding the filter head i found the inlet was almost blocked off from what looked like sand. Dec 5, 2021 · I have been looking into this issue some. I ask it why and the scanner shows nothing. Jun 3, 2012 · 2004. 02 (+65 hp ), Homebrew Biodiesel, Power Service, AC Delco stock filter w/TxC CAI, LuberFiner Fuel Filter, BTSI Security Lock Mar 24, 2021 · Hey guys I’m new to this forum, just bought my first duramax a 2005 lly not to long ago, I have been noticing it has a rough idle, it seems to fluctuate. 1 2. I thought maybe it’s bad tunes or injector issues or fuel pressure regulator. Only in park or neutral Mar 30, 2006 · RPM's shuld be smooth and constant at idle if all is well. New CP3 Sep 24, 2020 · GM launched the LMM in 2007. 5 (LBZ & LLY) Top Contributors this Month Mar 8, 2024 · 04 lly rough idle Jump to Latest 596 views 2 replies 3 participants last post by L-u-k-a-s Mar 30, 2024 Feb 21, 2016 · It's smoking at idle and the engine is shaking horribly and slightly knocking. Sep 10, 2024 · Ive had this lly since 190,000km (118,000 miles) and I had a really rough idle it would shake the truck and smoke but only did it sometimes and only when in drive, balance rates were bad took it to a shop they said injectors so I got them to change all 8 injectors with new oem Bosch ones, Ive only had the truck back for about a week and today I noticed it shaking in park, so I checked the Jul 3, 2024 · I've got a 2004. 5-05 LLY Duramax Powertrain I have had this problem for awhile whith white smoke and a rough idle but only in drive it doesnt do it in park or neutral. Feb 1, 2019 · So I'm pretty sure this is the first time the truck has been totally, heat-soaking, warmed up, since I've owned it. was starting to stop up or get contaminated or something, so I had a muffler shop cut it off and replace it with a straight pipe. Jump to Latest 21 - 29 of 29 Posts. Cut the tie and pull the wires out. have not had time to log fuel pressures etc. May 22, 2017 · Duramax Second Generation: 2004. Could also explain rough idle, but not so much the smoke. I noticed my temp was fluctuating from 180 to 210, so I bought a new coolant tank cap and drained the coolant, maybe 4 gallons. May 22, 2022 · It had a hunting idle, not when cold but as it warms up it gets worse, when I put the slightest bit of throttle on it it goes away. 5 LLY Rough Idle and smokey Jump to Latest 8. Tags lly duramax rough idle white smoke. Cost about $300 or so from a bosch dealer. 5/R16/super swamper IROKS/ eagle alloys/456 gears MODS:diablo sport predator/egr blocked/4'' straight pipe/LBZ MP/ppe boost valve controller Jul 15, 2017 · Chevy / GMC Duramax 07. A1278 · Registered. Feb 9, 2011 · I let the glow plugs cycle only once and turned the key. since the dy after i bought the truck its had somewhat a choppy or rough idle. Dec 6, 2015 · About 6 months ago my pickup started to go into and out of a loping idle in park. Not all the time but it does seem to happen a fair bit, also it sounds like the exhaust wants to cut out from time to time when it’s idling as well, just was wondering if that’s normal Jan 16, 2013 · Ok here is the latest on what's going in with my truck, and a few things I forgot to mention. Jul 26, 2022 · I have an 05 LLY w/214k miles, deleted and tuned, head gasket and studs done at 180k miles. (Fig. So i went back to kill each injectors again and nothing changed with any injectors. Almost sounds like a lope tune. Gutted DPF and welded it back up. 69. Oct 7, 2008 · Duramaxdiesels. " - Mark Twain's Notebook '04. Jun 26, 2013 · LLY Rough idle Jump to Latest 2. All currently on road. I did this back in the winter a lot as well then subsided. The DIC will display Elevated Idle on. Nov 29, 2023 · First, sometimes when I’ve started the truck it sounds like a 7. It was reused on new fuel pump. Figured it’d warm up and stop but it did not, drive to Walmart and could notice it while driving also. 50 20 Trail Graps, Moto Metal 955, Bilstein 5100's. The day after filling up I noticed a slightly rough idle in park. I am to the point of gas and a match. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. 4 and actual fluctuates from 4. Started regularly going into reduced power over DPF and long trips/regens no longer worked. Aug 6, 2015 · Stopped for a coffee and left the truck running, came out and its idling rough. and tries to run away when its in drive or reverse and I take my foot off the brake. During the loping idle, it will cycle revs around 50 to 150 rpm. It will sometimes bump it's idle up to 1200 rpm and there is no way to bring it down. 6 Duramax / 5 Speed Allison 1000 / S&B Turbo Inlet Mouthpiece / 4" MBRP Exhaust With Muffler / Trail Ridge Mirrors / Cooper Discoverer AT3 LT 265/75/16 / Rough Country Wheel Well Liners / RDS 60 Gallon Transfer Tank / Kennedy Single Deluxe Lift Pump / Baldwin BF1212 FWS Dec 9, 2019 · This is a 2005 Duramax LLY, with the high idle engaged and the engine idling at about 850 RPM it started to idle rough and almost sounded like it was surging Jun 25, 2022 · I am new to the diesel world and I’m looking for alittle help. Installed mini maxx tuner and thought that little mess was over. 5 (LBZ & LLY) Top Contributors this Month Nov 12, 2023 · Have had a rough idle idle in park at operating temp since I bought the truck. 2 to 4. Similar to its predecessor, the LMM has very few actual engine problems. 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. Jun 25, 2018 · Rough idle can be caused by bad engine mount-- exhaust contacting the frame, bad injector, or weak cylinder compression. Apr 5, 2011 · Brent 2005 Chevrolet Silverado Crew Cab 2500HD LLY 4x4, EFI Live V2 DSP5 tuned by Idaho Rob (ATP) Edge Insight CTS w/ ebay backup camera,EGR Blocker Plate, LBZ MP, PCV Reroute, Pump Rub Upgrade Transgo SK, swap over to TranSynd, Earl's Temp-A-Cure, Transmission Cooler, MBRP 4" Turbo Back Aluminized Exhaust (no CAT), BD Full Bore Exhaust Manifold, Insynerator DSL 3" Down Pipe, Banks 3" Monster Dec 3, 2021 · Couple of weeks ago idle starts being rough. Oct 23, 2012 · Hey guys so I have a 2004. when driving the truck is fine but ill come to a stoplight and it will start doing it then when I stop again its good. Nov 4, 2009 · surprise duramax 2005 gmc lly,6 inch lift,fox shocks with remote resevoirs,moog pitman arm & idler arm,fabtech tie rods,rear airbags,18 inch boyd coddington rims,12. GM Part 97384667 about $290 to $300 FUEL PUMP Dec 1, 2019 · 04. I recently changed the FPR (OEM Bosch) a few months ago and my desired FP is matching to actual pressure. Apr 3, 2020 · Started the truck yesterday and noticed the idle sounded off and that truck was shaking. Let me start out by giving you some history about the truck. 5-05 LLY Duramax Powertrain LLY intermittently has very rough idle. Act vs desired FP looks good; Injector balance rates all 2 or less; 2" vac on fuel fitting at idle Feb 11, 2013 · Just some very rough estimates (lots of variables so keep this in mind): Stock LLY (w EGR) => 25-28 gm/s Stock airbox, LBZ mouthpiece (w EGR) => 27-30 Stock airbox, LBZ mouthpiece (no EGR) => 35-40 LBZ airbox, LBZ mouthpiece (no EGR) => 40+ Yours is definitely low so look for either a pre turbo leak or possibly a bad MAF sensor (or wiring). bleeder screw, WIF sensor delete plug, Fumoto oil drain valve, Pacer LED cab lights, GM dually light bar under tailgate, Footwell lights, Cobra 29 WXNWST CB radio, Wilson 2000 CB antenna, Kenwood speakers, GM chrome oval running boards, Bilstein 5100s, Michelin May 25, 2022 · 6. just recently it has developed a miss or skipping at idle very rough. not long after he first bought it it had the #7 injector connector issue that caused a mis and low power, that was fixed under warranty and all was well until recently. I read all about these issues on the forum and replaced my Fuel pressure regulator valve but it still has the same issues. Mar 20, 2010 · 04. Since last week I have been having a vibration while the truck is running at idle. Jun 10, 2016 · Still showing 13. It seems more of an LB7, LLY problem. It has been a great truck so far but now it started to idle rough and has no power. Dec 27, 2010 · Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 5-2005(LLY) Status Not open for further replies. Jump to Latest 21 - 32 of 32 Posts. May 19, 2014 · I have a 04. Rebuilt the filter housing, replaced one injector that bal rate was slightly high, added a lift pump, checked all the lines for kinks, leaks etc, picked the entire harness, had trans redone, even tried a new fuel cap. And when I say "rough" I mean REAL rough - bucking bronco style (the whole truck shook very hard). Oct 16, 2011 · 2007. Don't know where to begin. 65k on the truck all injectors are new it started doing this before new inj. May 22, 2012 · All injectors have worked fine, the only thing I know that is needing replaced is the pressure plate, but have there been previous instances with the lly and manual transmission that resulted in this. 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. 3 days ago when this all started happening right after it went into a rough idle, the truck wouldn't go past 2000 rpm. I changed the Fuel pressure Relief Valve with a race plug and it corrected the pro Oct 1, 2009 · The LMM "elevated Idle" as shows up in the DIC is solely to warm up the truck faster in cold weather, it doesnt work when amdient temp is warm. 5-10 LMM Forums. Mar 30, 2015 · This is my father in laws 2005 Chevy 2004. Inspect the flexable fuel lines from the tank to the fuel pump, if there is even the tinest air leak, surging, hard starting, and infrequently small drops of fuel on the driveway happen. Feb 4, 2024 · I have a 2004 lb7 duramax that has a rough idle. 2 to 14. 15) The idle condition may be most noticeable when the engine is Apr 20, 2017 · LLY rough idle, no power Jump to Latest 5. Feb 10, 2010 · 04. 0) in park unless I hold the brake Have sent log to tuner they bumped rail pressure to 6. conv. 5 LLY idle cycles in park and neutral. [aftermarket lift pump installed-the Duramax does not have a lift pump] Jan 17, 2012 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w Sep 13, 2012 · OK, so it seems that it's a common LLY issue to lope at idle. PLEASE HELP ME. Nov 20, 2007 · 6. Tags running rough. Temp. from every thing I have read 14. 5 LLY with around 105,000 miles on it. See less See more 1 Save Share Aug 23, 2024 · Vibration or Rough Idle in Drive or Park April 13, 2021 A rough idle or vibration at idle may be present with the transmission in Drive or Park on some 2019-2021 Silverado and Sierra models equipped with the 5. Truck starts great, will idle fine. Sep 9, 2013 · i just did a headgasket job by myself on my 04. :thumb Sep 30, 2009 · 6. I believe spec is 8-10mm3 for LLY. Jump to Latest 204 views Jul 9, 2020 · Fuel pressure relief will not cause rough idle. Note: The LB7 and LLY engines with a FICM, do not like fuel pump lift pressure over 8 lbs. Mar 12, 2008 · Could possibly be your Fuel pressure regulator on the fuel pump. Truck Apr 2, 2011 · Duramax Second Generation: 2004. . Truck has roughly 95k on it. Now "High Idle" or RPO code UF3, is an option you must order with your truck. 5/13. AMP powerstep. Then run that tank down to nothing and get rid of that shitty fuel! Only fill up at major truck stops. Start it up and i have a rough idle. I made it home and drained the fuel filter. 5 LLY 2500HD 4X4 CCSB LT 4" downpipe back flowmaster with electric cutout air box mod, LBZ mouthpiece, Fluidamper, new FPR, rebuilt fuel filter housing, GM new injectors, EGR delete ,edge cs Insite, EFI Live, pump rub fix, Kryptonite UCA, 295 70 17Toyo RTs on H2 wheels, 300k+ Apr 3, 2010 · The rough idle happened again. Oct 7, 2021 · Had with a bone stock 09 LMM, @130k. 9K views 7 replies 3 participants last post by 05 lly kodiak Jan 16, 2016 Apr 28, 2009 · So a couple weeks ago I ran some Redline fuel additive in my 05 LLY. Put it in gear and it calms back down to normal. I thought maybe the cat. Then the truck actually started the choppy rough idle and of course balance rates went away and ECT was around 185 by now. As soon as I rev the engine it smooths out. If the problem continues further, you may need to replace (or rebuild) the fuel filter head, the part that holds the filter and contains the primer. the idle has my motor kinda shaking Oct 24, 2014 · My truck does not start smoothly in the cold any longer. Finally took it to the dealer. Aug 20, 2010 · I have a 2004. still idles rough. Jul 2, 2024 · I've got a 2004. I have put two cp3 pumps in and three pressure regulator and a new fuel rail pressure sensor and still no changes. I pressed the gas and brought the idle up to 1000rpm for about 20 seconds then shut May 19, 2014 · I have a 04. 5-10 LMM Duramax Powertrain CEL P1227 Rough idle. 5-10 LMM Duramax Powertrain Very bad hesitation & rough idle. Still runs like it did before, except in the single case of being warmed up, in park or neutral, at idle. Hoythunter2865 · Registered Oct 19, 2013 · Bought a 2005 LLY not long ago and since I've gotten it, it's had an inconsistent rough idle; it's not too noticeable but enough to make the truck shake oddly every now and then. LLY Might be related: About 2 weeks ago, while warming up the truck, I had a rough idle. Joined Jun 4 Nov 15, 2013 · My truck is a 04. 8. Originally took it to my local BD dealer who said everything checked out fine so try an EGR Delete. It will intermittently run rough, but most of the time it runs smooth and just smokes. Fuel pressure Regulator valve works I assume. That can cause rough idle and lope. Problem is once it starts the number 7 cylinder injector balance rate is a 12 like that cylinder is not firing. The problem Im having is that when stopped and in gear the truck is surging/idling rough and smoking white smoke, not the typical black diesel smoke. Oct 22, 2011 · *Steven:2oo9 CC/SB Z71 Duramax* EFI Live w/DSP5 by Kory | SDP EGR Delete | Silverline 5in Exhaust w Dual 6in Black Aussies | Magnaflow Downpipe | Edge Insight CtS | 6in Rough Country Suspension Lift | 18in XD Rockstars | 35. Jan 11, 2012 · 05 lly cc sb 4x4, k&n on lbz intake, resonator plug, lbz mp, 4" silverline, pcv re-route, ported fuel rail fitting, egr delete tube, fprv shimmed, air dog ii 165, deep pan/filter lock, trans-go jr shift kit, syn blend trans fluid, ppe standard, h2 wheels wrapped in 295 graps, hid h/l/f all on, led plate lights, manual high idle, gatorback serp Sep 21, 2024 · 04. Truck also blows blue smoke for 5-10 minutes. To turn it off do the same thing. 50x35 open country toyo's,cat lost, 4" exhaust and monster muffler,afe mp,deep trans pan,earl's larger trans cooler with electric fan,large fluidyne oil cooler,afe cold air intake,afe mp,3 downpipe,custom made air scoop,onboard air Apr 10, 2021 · I have a 2005 LLY, 1 owner. It allows you to control idle speed hi or low with the cruise control buttons. It would puff a little white smoke and idle rough. May 20, 2017 · Ok I drove the truck today. Hot or cold start didn't matter. It acts like a FPR, but I replaced the factory regulator with a brand new Bosch regulator from Merchant about 12k miles ago. Idle is not smooth, confirming the high balance rate. May 25, 2012 · Advanced Search Cancel Create thread New Forums More Login / Join Mar 31, 2019 · My 2005 Duramax LLY had a rough idle and surging while holding the brake. png. 5 duramax LLY that has a rough idle. 6K views 10 replies 9 participants last post by 2004duramaxLB7 Jun 29, 2013 Nov 14, 2013 · ( truck wasn't surging like normal yet ) So i Ice Picked, started up, all was fine Solus was showing the balance rates. Oct 20, 2014 · Mine has had an intermittent injector knock since I've owned it- over 9 years now. But we are not wanting to screw it up. 12. Aug 24, 2005 · Duramax 2004. 5-2005 (LLY) Jerry30 online 9 hours ago · #1 Injector issue I have a bone stock 2005 lly. I just got my truck last week, and sure enough, intermittently at idle (whether in D, N, or R), it will lope a little bit. 5 (LBZ & LLY) Top Contributors this Month Jun 13, 2014 · Rough idle/white smoke lly. Solutions If the fuel injector on your LMM Duramax engine is clogged or damaged, you will need to remove it from the engine and clean it professionally. There is no check engine light on and no smoke. I pulled connectors on cp3 and fprv and Ice picked them to make sure they were connecting the truck was still having high rail pressure but I reset codes with the engine running and started driving it before code set again and as long as I was applying throttle the truck drove wonderfully very quiet and smooth but if I tried to get on it it fell on it's face and if Nov 21, 2024 · A bad fuel injector can also cause rough idle and power loss issues on the LMM Duramax engine. About a month ago it started to idle rough and blowing white smoke at an idle when i gets up to oper. truck has 230k on the motor with a full egr delete,efi liveI thought my valves weren’t lashed right so I rechecked my specs and they are all at . Happens on all 5 tunes. Tags dfrp fpr 2004. Aug 28, 2012 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w Oct 29, 2014 · 2008 3500 CCLB Z71 LMM: 4" tuff country lift/ EFI/ deleted/ 5" MBRP & DP/ FASS 150/ CTS 2005 3500 CC Dually LLY LIFT: 10" third coast/39. I haven't noticed this before and am not sure the issue. 5/05 LLY engine -- It is secured at the side of the alternator with a Zip tie. Around 5K at idle. As soon as you tap the throttle it goes away, but if you do that while it is in its loping mode as soon as it comes back to idle it starts loping. barely mash the peddle to about 3-5 percent tps by EFI live monitoring and engine smoothes up. It is mainly a farm truck now, so I’ve overlooked it. About 9 months ago I got some contaminated diesel at a convenience store. Jul 27, 2010 · 2008 3500 CCLB Z71 LMM: 4" tuff country lift/ EFI/ deleted/ 5" MBRP & DP/ FASS 150/ CTS out to the blak cap,started it up and ran rough for a while with a knock Apr 9, 2014 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein Aug 30, 2009 · 04. Should be around 4-5k at idle. When it’s running rough actual rail pressure is inconsistent. Sep 11, 2009 · a good friend of mine has an 05 LLY dmax with approx 65k on it. Oct 28, 2008 · Regards, Keith "The government is not best which secures mere life and property--there is a more valuable thing--manhood. so new filter head, filter, hoses, & Carter lift pump was thrown on. I Jan 2, 2016 · Yes he can and did control rail pressure. I've replaced, all 8 injectors, cp3, fuel lines, filter head, fuel filter and it still has a sporadic rough idle when warmed up. Efi shows a dead hole on #8. Jan 25, 2011 · 04. Most times, the RPM needle doesn't even move. Replaced MAP, cleaned the MAF. Oil pressure came right up to 60+psi like normal. Apr 5, 2011 · Sub'd, my 04. 7 KB Views: 228. pcv re-route, LBZ inlet and S&B, EFI Live! Nov 15, 2022 · For the past few years my truck has idled rough - hard to explain, but it would like build up pressure then idle normal for 4-5 seconds, and repeat. 50 Nitto Mud Grapplers | 2in Rough Country Wheel Spacers | AVS Headlight and Taillight Covers | Limo Tint | Debadged | Carriage Works Black Billet Grille | DDM 6k HiDs Oct 18, 2012 · TDI, Elevated Idle can be turned on (if your steering wheel controls don't have the option) by turning your ignition key to the on position (don't start the truck) and mash the accelerator pedal to the floor and hold, then press the brake pedal 3 times in 8 seconds. My guess is that it is a safety feature to protect itself. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. 4" MBRP Turbo Back w/5" tip. Bacon Jul 10, 2021 · Rough idle, white smoke. Jump to Latest 4K views Jan 1, 2013 · 07. It seems like we may be getting too low of a fuel flow rate at idle. It also is idling rough. 5 (LBZ & LLY) Top Contributors this Month Feb 14, 2012 · It starts right up, runs rough, smokes white, and has no power - won't even rev to 1400 RPM and barely can idle around the parking lot. 2005 Chevy Duramax LLY, EFI Live, ported fuel rail, PPE race plug in fuel fail, 3" down pipe, 5" straight back exhaust, 6" tip, 171K Aug 1, 2016 · well, i have been on the forums for a while, but i can not recover my password, and am in a bit of a pickle so i set up a new username My truck is an 08 LMM, it has EFI live by idaho rob, mbrp downpipe, 5in exhaust, air dog, pcv reroute, egr blocker plate and factory intake. 5-10 LMM Duramax Powertrain. 1K views 3 replies 2 participants last post by jc1843 Apr 21, 2017 Jun 15, 2012 · 6. I’ve ice picked the plugs minus the passenger side rail and fpr. Just has a rough idle in park when warmed up. Rough Idle and Smoke. Also the rpms doesn't seem to change at all during this. inspect carefully. still rough idle and efi still showing 15 on balance rate. Jump to Latest and it seems like it only happens when I am slowing down and almost at idle. It's only got 135,xxx on it now. Not necessarily pressure. My Feb 8, 2016 · 🇺🇲🚛 2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves-->>2006-6. The engine also has a slight shake within the engine bay. When checking balance rates, at idle, all injectors intermittently go to 0 simultaneously. rough idle after hard acceleration. jayu shpn cnyfnau xtyw ovbf cuy xdoquui bpsrteah ndaj tpmob