- Lmm duramax rough idle Usually I’ll have to wait a couple days but this time I was able to get it to do it If the fuel injector gets damaged on the LMM Duramax engine, you will notice excessive smoke from a tailpipe at idle. Duramax 6. Chevy / GMC Duramax 06-07 LBZ & LLY Forums. SOLD - 06' LBZ Duramax - Common LMM duramax problems you may experience are clogged DPF, cracked pistons, faulty fuel injectors etc. 5 LB7 Forums. Echo. Dec 25, 2016 3 0 0 Dayton tx. Replaced batteries and alternator. Only does it when the motor is cold. Sleep in my stock 06 Silverado 2500HD 4 x 4 as I'm only gone a Chevy / GMC Duramax 07. Shut it down and restart. I think its almost like a light lope from sound and feel. S. Jump to Latest 9. From all out performance builds running 8 second ¼ Rough idle while stopped in drive. 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. All other injector rates are 0-3 +/- replaced injector 2 with no change. Come join the discussion about modifications, towing, classifieds Kevin: SOLD!!!!! MY07. Jump to Latest 2008 2500HD 6. put a brand new filter on thinking it could be that, no changes, pulled the bleeder valve screw and it was totally destroyed so i replaced that and still nothing changed. I went to start it the other day and it's running rough at idle. truck runs excellent just crappy idle. SS Downpipe, 4” PPE SS Frontpipe, OEM Catback Exhaust, PPE uppipes, HSP intercooler pipes, Hayden 2886 Fan Clutch, LMM Resonator Box, Airdog LP, PCV reroute, S&B intake w/ LBZ Scoop. 4K views 23 replies 13 participants last post by MMLMM Mar 24, 2009. #8 injector jumps up to 7. ) Fast Idle Control The vehicle may have this system which can be used to increase the engine idle speed. M. 2K views 4 replies 07. Seems to always idle rough after being driven hard or anything above 70% throttle. Idle is right around 600rpm and if I bring it up to about 8-900 it gets a tiny bit rough and just a little stumbly I feel like. Save Share Reply Quote Like. Who's got 5" Exhaust with EFI (hiss & rumble idle) Jump to Latest 30K and which tunes to have the LB7 Rumble at idle. Within 100 miles it decided it still wanted to go into reduced power mode. com was founded in 2006 and created a site which houses With a P0090 and rough idle is it safe to say my FPR went out? Anything I can check before just changing the part? Thanks 2007 2500 4x4 Suburban / Tuned / electric fans / system / custom bcm programming / LMM Is there anyway to get high idle on an LMM? My truck does not have the factory high idle in the DIC either. it will idle fine for about a minute, and then it will idle at about 700-900 rpm and will sound and run rough. rough idle. Rough idle when cold Thread starter Ridin'GMC; Start date Apr 10, 2014; Forums. 01-04. 8M posts 225K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Jump to Latest 10K views There is 1 thing in the tuning that could cause it to have a rough idle, this is the regulator. My 2008 has the elevated idle, but no factory fast idle. Its throwing code P2149 but not any individual injectors codes. 2007. 04. It was a different generation than yours though. 5 Chevy 3500 duramax with Edge Evo Race chip, straight piped from turbo downpipe. 5 lly with stick. Fast Idle control will be enabled when the following conditions are met: The park brake is set. have not had time to log fuel pressures etc. 2009 Chevy 2500HD LTZ LMM - DPF Delete - DSP5 w/Duramax Tuners 60, 80, 100, 130 - Edge CTS - GY Silent Armor 285's 07. Did head gaskets on the truck after figuring out a bunch of electrical stuff it Im having the same symptoms. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. 9K So I have a 2008 LMM 3500 HD. Almost sounds like a lope tune. Jump to Latest Follow 1K views I have a 2005, that idles rough at times. . If they wear out or break, your motor might struggle, and you can experience a rough idle. It will slightly start to lope before the rough idle and seems to do the rough idle when it gets to operating temps. I used to idle a Duramax overnight a lot, no issues. Not all the time and always after about 1 minute of starting in the morning. I travel the eastern seaboard part time hauling boats and trailers for people in Atlantic Canada. The fast idle switch for my truck was #T500110. - Idle smooths out in gear- Drive or Reverse, will do it but to a lesser degree in Rough Idle and Smoke. 5 duramax LLY that has a rough idle. Only show this user LMM duramax idle issue at startup . Figured it’d warm up and stop but it did not, drive to Walmart and could notice it while 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 My 2010 Duramax runs rough when first started for the day. Dec 26, 2016 #1 OK I bought a 06 Duramax it idles rough when you try and give it fuel it spits and sputters want idle up. I have a Lmm duramax swap that I am having high fuel rail pressure at idle 12-18k. see the graphs attached, there are spikes that occur in RPM and Manifold Pressure while idling, unsure of what is causing it. 5-10 LMM Duramax Powertrain Adding fast idle to LMM. Rough idle - startup - AC/hvac? Jump to Latest 4. Madbuzz41. Sonny Butcher New member. B. 8" Cognito, 20" SOTA'S, PPE Stage 5, SDP S475 Twin Turbo Over Stock, EFI Live Im having the same problem as we speak. 07. Standard on trucks with PTO. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. I hardly drive it, and it mostly sits. 955 posts · Joined 2023 Add to quote; Only show this user #20 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. The idle wanders around from 580-700rpm, actual fuel pressure is 4500-6500psi, it's bouncing the truck around, its terrible. 5 - 3500hd LTZ. The idle seems to go in waves then sudden jolts every 20-30 07. Jump to Latest 2. Duramax Hard Parts. has trouble starting up, but i was able to do it after cranking a few times. 5-10 LMM Duramax Powertrain Regen rough idle. 6L Duramax Z71 SLT, 4" MBRP T409SS With 4"x6"x18" Tip, DPF/CAT Delete, EFI LIVE DSP-5 Switch, Edge Insight CTS Tunes From IDAHO ROB Wheels: D'Centi 903 20x10, Tires: Cooper Zeon LTZ 305-50-20 The DMAX is sold:drink C'Mon Bring The PSI!:rockin. Injector 1 and 2 have balance rates of +14 and -14. 06-07 LBZ & LLY Duramax Powertrain Help!!! Injector balance rates off, random misfire codes, rough idle Help!!! Injector balance rates off, random misfire codes, rough idle. Kieda Discussion starter. 3K views 1 reply 1 participant last post by Kieda Sep 29, 2014. 6L LMM Turbo. Theres 2 types of "High Idle. Joined Jun 4, 2023 · 25 Posts. 5" pro comp rims *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. The rest all are +- 0. Symptoms: - Rough idle after being started- usually after a minute or so. barely mash the peddle to about 3-5 percent tps by EFI live monitoring and engine smoothes up. CCLB. 2K views 1 reply 2 participants last post by mrmanners Sep 2, 2009. 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 Follow 1 - 8 of 8 Posts. LMM rough idle when sitting. My opinion is not the opinion of Duramax Forum, Vertical Scope, or other Duramax Forum staff members! Old Trucks: 1 - LB7, 3 - LLY, 1 - LBZ, 2 - LMM, 1 - L5P. The motor sounded very "airy" and as if it 07. BIGco2FOOT Discussion starter. 35" Nitto grappler all terrains, 20x10 Moto metal 951's. 5-10 LMM Duramax Powertrain Lmm- p2149- runs rough. Started the truck yesterday and noticed the idle sounded off and that truck was shaking. 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, Truck idles rough at times. LMM small, short idle lope. Truck knocks, runs rough. Edge evo race cts on level 2. I have put two cp3 pumps in and three pressure regulator and a new fuel rail pressure sensor and still no changes. It says injection pump can reference missed 40 times . Completed a full service with fuel and oil filters. Chevy and GMC Duramax Diesel Forum. Bad diesel, rough idle, white smoke and NO Start. 3. Save Share Chevy / GMC Duramax 01-04. MY07. Truck would randomly throw P122A and P2155. Save Share y’all I just purchased an LMM bout a month ago and it has this issue after about 45 seconds after starting it starts idling weird. 54 posts · Joined 2008 Add to quote; Only show this user #1 Chevy / GMC Duramax 04. 3 posts · Joined 2009 Add to quote; Only show this user #1 · Jan 22, 2009. Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different 2008 Silverado LT, Crew Cab, 2WD,LB I had the 21 duramax thumping noise rough idle got the 24 no for the longest time my lmm has had a issue with bad surging at idle (+ or- 60 rpm) up and down Code P0087. Reactions: Airme, jdwarren and Madbuzz41. 11 posts · Joined 2014 Add to quote; Only show this user #1 · Sep 27, 2014 (Edited) 07. A1278 · Registered. Random times truck will idle rough. I contacted gmupfitter and they send me a note telling me to contact Throttle Commander Throttle Controls - VMAC they are located in BC under the name of VMAC. 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 Chevy / GMC Duramax 04. 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. 5-10 LMM Duramax Powertrain. And when I say "rough" I mean REAL rough - bucking bronco style (the whole truck shook very hard). 5-05 LLY Duramax Powertrain Rough Idle HELP! Jump to Latest 08 CCSB LMM LTZ- 6" super lift with t bar drop. If anyone has had a similar problem or knows what to check, I would be very appreciative! Had with a bone stock 09 LMM, @130k. 10 miles down the road the truck started 07. 5-10 LMM Forums. 1 2. We strive to keep this the #1 forum for tech and information while continuing the 07. Still runs like it did before, except in the single case of being warmed up, in park or neutral, at idle. Duramaxdiesels. Jump to Latest 'liLLY' 05 duramax 2500 CCSB 4X4- 334,995 Limitless Diesel Built trans with Suncoast 1054 converter:thumb:, Grade C's, ARP head studs, PPE Standard, Edge insight cts w/ EGT probe, Duramax Tuner race valve (plug), Magnaflow 3" downpipe, 5" flow pro, 265 transforce, Bilstein 4600, pcv rerouted 07. Chevy / GMC Duramax 04. 4K views 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, I had the same problem trying to find a fast idle switch for my 2007. 4x4. I’ll try and make a video of that. I owned a 19 no issues 2021 idles rough but not terrible low end knock as well at 1100engine is rough above that it is fine. 185 posts · Joined 2010 Add to quote; Only show this user My 2005 LLY recently started exhibiting a problem: very intermittent, very rough idle. It will obviously go into limp mode as well after idling for more than 5 minutes, i have found if you rev it before pulling it out of park then it will not go into limp mode. 2005 Chevy 2500HD Duramax LLY BANKS ram air intake, MBRP 4" exhaust, CAT DELETE and NO MUFFLER, EGR Deleted, Fisher SS ExtremeV plow, Auto Meter Gauges, Boost, Pyro, Fuel Pressure, turbo resenator blocked off, PCV Reroute. 65k on the truck all injectors are new it started doing this before new inj. 5-10 LMM Duramax Powertrain Rough Idle. my truck is running rough at idle only when its up to temp oil pressure is down and fuel/oil coming out of blow by tube, and its all over the under chasis of the truck 2008 Duramax Silverado EFI from ATP AFE Dpf delete Banks Dpf back exhaust Westen bull bar and nerf bars RCD 6" lift with MT ATZ's 325/60 at's and 18-9. any ideas ? Trying to start my truck and it idles really rough and sarts shaking. 5-10 LMM Duramax Powertrain CEL P1227 Rough idle. Efi shows a dead hole on #8. I've been running EDGE Race on level 3 w/ the DPF gone. After about 15-30 sec of this it drops in rpms back to normal and thats it. 4K views 4 replies 06 Duramax rough idle and and loping Thread starter Sonny Butcher; Start date Dec 26, 2016; Forums. 02 (+65 hp ), Homebrew Biodiesel, Power Service, AC Delco stock filter w/TxC so the truck runs and drives just fine, but at an idle it jumps up about 200 rpm every 5-10 secconds. 11-16 LML Duramax Powertrain '11 lml rough idle/white smoke '11 lml rough idle/white smoke. 5 LB7 Duramax Powertrain Cold Start, Rough Idle What are the possible causes of the rough idle? 2003 Chevy 3500, Diesel, 4x4, Dually, 50,000 Miles *FOR SALE* 2007 lmm crew cab short box MBRP, Bob Olsen Tuned. IGUESS Discussion starter. Have egr codes replaced with no change. About 9 months ago I got some contaminated diesel at a convenience store. EFI doesnt adjust the high idle settings in LMM, only the actual normal idle speed. Truck runs great and I just can't figure out what the deal is. Getting P0191 fuel rail pressure range/performance problem and P0107 MAP sensor low input. duramax 6. Once it warms up, the issue see the graphs attached, there are spikes that occur in RPM and Manifold Pressure while idling, unsure of what is causing it. The symptoms almost go away when it is up to temperature has a knocking sound more than normal. It's much louder than it usually is in the engine compartment and it's sounds like you can hear a loud tick from within the engine. 6 Technical. 5 LMM Chevy CCSB Z71 Edge Evo Race, Banks Ram Air, MBRP 5" Exhaust, Diamond Eye DP, EGR Blocker Plate, PCV Reroute Mod How long can you idle a duramax diesel New to the tread. Started regularly going into reduced power over DPF and long trips/regens no longer worked. LBZ . However, all tuners leave this stock that I am aware of Lmm Smoke At Idle. Jump to Latest My 08 lmm during regen surges and has a slight rough idle whenever im coming up to a stop or if I put it in drive or park. msloop77 I am new to the diesel world and I’m looking for alittle help. 5 GMC Sierra 2500HD LLY/Allison M74, Summit White, CC/SB SLE 4x4, Leather, Westin Nerf bars, DiabloSport Predator 2. any one else I have a 04. Installed mini maxx tuner and thought that little mess was over. Jump to Latest Sold - 2008 Chevy K3500HD CC/LB LTZ with LMM Dmax Sold - 2004 Chevy K2500HD Ext. Cab/LB w/ Couple of weeks ago idle starts being rough. At cruising or freeway speed, I can’t discern any shake over the general rough ride the shot suspension provides. Come join the discussion about modifications, towing, classifieds Piston rings help seal the combustion chamber and control the flow of oil. I. No problems. Jump to Latest 12K views 15 I do see on the scanner that my actual and desired fuel pressure is very close at idle and at higher rpm. help 2008 Chevy 2500HD LTZ CC/SB LMM - Traded in for 2021 As the title says, my recently purchased LB7 has a rough idle. it is reading rpms. Has 276,000 egr deleted, tuned with EFI live. Only idles rough when in park and when in my first 4 tunes, my 5th tune (150hp) idles like normal. 08 chevy 2500hd rough idle and shake. The balance rates on every injector go back and forth between -7 to +15 when acting up. 🇺🇲🚛 2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Customer: 2013 duramax rough idle white smoke smells like unburned fuel. So I'm pretty sure this is the first time the truck has been totally, heat-soaking, warmed up, since I've owned it. I thought maybe the cat. Jump to Latest 21 - 32 of 32 Posts. Duramax Tuning, Logging, and Gauges Duramaxdiesels. Jump to Latest and it seems like it only happens when I am slowing down and almost at idle. LMM Injector Problems. I replaced the injectors because it had a rough idle and smoked white. It’s not super rough. Running/idling rough, no clue! Jump to Latest 5. Gutted DPF and welded it back up. The transmission is in P (Park) or N (Neutral). Let me start out by giving you some history about the truck. RPB grill, 6k HIDs hi/low and fogs, autometer pyro/boost gauges, 7-9" cognito, air bags w/compressor, train horns, 20" rockstars, 35" toyo MTs, 5% tint, AMP steps, DPF DELETE, 5" magnaflow w/ RPB tip all gone but the muffler, AFE intake, two JL 10's, JL speakers, PPE HOT, titan tank, bed liner, 10inch adjustable drop Chevy / GMC Duramax 07. 12. rough idle could be from a cracked head and if you had a cracked head your cooling system would be pressurized thats why i asked about the Rad hose. It is more of a sudden surge while I am at a stop. Upon start up the truck idles rough no matter what with the same codes. 06-07 LBZ & LLY Duramax Powertrain Rough cold start. 7mm . the truck is 04. Worn piston rings can cause oil to seep into the my lmm has been idling quite different in the mornings. You guys are talking about "Elevated Idle" that is on all LMMs. Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different 2008 Silverado LT, Crew Cab, 2WD,LB A forum community dedicated to Chevy and GMC Duramax diesel 07. " - Mark Twain's Notebook '04. I haven't heard many Duramax trucks with exhaust & tuning in person. Reactions: Airme, '11 LML, '10 LMM and 04. 5-05 LLY Duramax Powertrain GMC Sierra 2500HD Rough Idle After Bosch Injector Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different 2008 Silverado LT, Crew Cab, 2WD,LB mine had a rough idle when warm, zero balance rates after new 07. Only does it when it’s in regen and driving on the highway drives normal. Jump to Latest 6. When I pump the top of the fuel filter, no more rough idle. truck does great til it hits 180 then idles rough. I ask it why and the scanner shows nothing. Discussion starter · #21 · Jul 31, 2023. conv. 5 3500HD SRW. A bad fuel injector can also cause rough idle and power Chevy / GMC Duramax 07. 5 LLY. 5-05 LLY Forum. Trying to sort out an issue with my LMM, this funky/rough idle will happen after it sits for a while. 5-05 LLY Duramax Powertrain missing and smokes white and idles rough? Idles rough actually more a of a lopy idle. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Jump to Latest Idle is not smooth, confirming the high balance rate. 5 3500HD Good question, I forgot to bring that up. I have a 2004 lb7 duramax that has a rough idle. I just replaced 2003 2500HD CCSB "Black Betty"-Moonshine powered EFI Live, K&N cold air intake, 4" MBRP straight pipe, SDP tie rod sleeves, PPE Boost valve, BD hi-idle switch, Single Kennedy Diesel Lift pump, Glowshift gauges and pillar pod, SDP custom stage V trans, smoked halo headlights, taillights, and cab lights, 6" lift with dual shocks in front bags in rear. LMM. When activated, it will raise the idle up when outside temps are very cold. Surges of 50rpms up and down from normal idle, very fast and noticeable by sound not just gauges. Jump to Latest 8K views 14 replies The rough idle happened again. LT. We have the power in tuning to adjust the milliamperes sent to the reg for desired fuel rail psi. 50 Nitto Mud Grapplers | 2in Rough Country Wheel Spacers | AVS Headlight and Taillight Covers | Limo Tint | Debadged | Help! My engine isnt happy. I had this before and fixed two injector harnesses. I put new reman Bosch injectors and a new fpr. LBZ MP, Fleece Tapshifter, Edge CTS2, Mishimoto Trans Cooler, DT 6-Spd Conversion, 2015+ Tow Mirrors, LMM Rear Bumper, LML Start it up and i have a rough idle. just recently it has developed a miss or skipping at idle very rough. Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different 2008 Silverado LT, Crew Cab, 2WD,LB. Jump to Latest 1. A bad fuel injector can also cause rough idle and 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. Compression is 400-420psi. Regards, Keith "The government is not best which secures mere life and property--there is a more valuable thing--manhood. " FAST IDLE (This is an added option. 5" MBRP SSTB straight pipe, 6 inch tip, DDM 3000k Fogs, 6000k Lows, all on mod Rough Idle need help 09 white on black CC/SB LTZ loaded. 5-10 LMM Duramax Powertrain P0088 Rail pressure too high. I have had 3 different injectors in the #8 spot and it still does the Rough idle can be caused by bad engine mount-- exhaust contacting the frame, bad injector, or weak cylinder compression. So if someone has a similar set up as I am getting I would love some exhaust vids where you switch from hiss to rumble at idle. 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 Chevy / GMC Duramax 11-16 LML Forums. 5 Silverado 2500HD WT 4X4 LMM Victory Red 2017 Honda Accord Sport 6MT Crystal Black Pearl 07. i dont have any codes. The truck idles rough as can be but does not seem to always do it. lvwp wfb bebdp hqeb nwxek cgtv upf ncqu dpamdf szlufk vrgzhyhn faja uop fiuu wpkraso