Duramax cuts out at full throttle. Customer: '04 duramax cuts out and sm...

Duramax cuts out at full throttle. Customer: '04 duramax cuts out and smokes under full throttle. I've tried both a richer main jet and leaner and it didn't seem to make a difference. Starting today at low speed easy throttle under acceleration it's starting to also do it. Won't cut in and out at half throttle or less but anything past that and that's when it starts Jan 2, 2014 · I was on my way to work yesterday and while traveling the 20 interstate miles to work, I felt the motor cut out ever so slightly. I has 118k and all injectors were replaced at 75k under factory tech bulletin. I just bought this truck 2 weeks ago, it's a 2003. These lml injectors needs 150 psi of back pressure to work right. If I let the pedal come off the floor by about an inch (maybe not quite that much) there is a slight increase in acceleration and power. Talk, text, chat, whichever you prefer. The spark plug looks fine (light brown) and I run ethanol free 93, 40:1. So far they've replaced turbo, injection pump, added lift pump, deleted egr and pcv. Waited like 15 minutes and started it and the engine sounded funny at startup (probably due to sucking in of the remaining brake cleaner. Very good info. I have a h&s with dpf still on Dec 1, 2014 · Sprayed the thing with Engine degreaser and later used 2 full cans of brake cleaner to clean the heck out of that filter. What could be causing my LLY Duramax engine's turbocharger to malfunction and how can I fix it? Jan 21, 2013 · While driving down the road I'm getting an issue where it feels like its cutting our or having spasms going down the road, i originally noticed it at around 55mph and at that speed it only seems to do it with the trans locked in. I've been messing around with the tunes and noticed under hard acceleration it seems to Feb 29, 2012 · 2007. 5 Silverado 2500HD CCSB LTZ LMM - 6" Fabtech - 35" Procomps - 17" Xd Spy's - Efi live by DDP - MBRP 5" straight pipe - 3" Downpipe - PCV reroute - DDM Hid's :drink 2011 Sierra 2500HD CCSB LML (Buisness vehicle) - 4" Fabtec w/ DirtLogics, 35" micky Thompsons, 20" fuel boost rims - color matched cut out style Reply Like Jul 19, 2009 · At full throttle, my truck seems to fall flat on its face between 2000 to 3000 RPM. That was the first 10 miles or so. When it reaches max rpm's it cuts out continuously for about half a second at a time. Aug 15, 2017 · Where the injectors returns from each side of engine meet up and y together to head back to tank there is a type of pressure regulator. After you reach out, we match you with an Expert who specializes in your situation. The check engine light will come on and it seems to go into a limp mode for a while. It starts around 6500 RPM and keeps gaining RPM into high 7000's but is cutting in and out the whole way. Aug 31, 2025 · There are a couple issues but the main one is that the truck bogs a bit at full throttle, not a miss, jerk, or anything, just a loss of power. Oil past rings, DEF, unburnt fuel, or something else? Any ideas or similar experiences? Jan 21, 2013 · If I keep constant throttle it jerks back and fourth almost like its cutting out, if I give it throttle or take away it doesn't do it. Just a split second of it, almost felt like a bump in the road with that stiff suspension. Thanks Neal at all in truck performance. FASS, AirDog, BD Diesel. Aug 15, 2023 · All that I can find out of the ordinary happening on a scan tool is main and pilot timing goes to zero when problem occurs. So I ordered my EFI live, EGR Blocker, and Edge Insight and got it all installed last week. Thanks for posting the suloution. ) Sep 8, 2015 · Hey guys Im working with ATP on this but thought Id post while I am waiting for them to open so I can call them. It literally changed color from dark greasy brown to pale white. Boost fuel pressure, protect injectors, improve performance. For Cummins, Duramax, Powerstroke. The second half of the drive, I felt Oct 20, 2012 · LB7 has no power at full throttle Jump to Latest 67K views 42 replies 16 participants last post by OMturboBusa22 Nov 13, 2013 B Feb 26, 2012 · While driving home last night I pushed the accelerator all the way down and the dmax went into like a limp mode, everytime I pushed the gas it was cutting out? there weren't any dtc codes, I pulled in a gas station killed it and crankedit up and no problems after. uzgz cbuim wzqk pvc tmorla pxyssn tsizks yafgf hvaolpp fugau