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J
08 lmm limp mode issues
Truck runs a little warm when towing, sounds to be the same as every other lmm of people I know That have one. I will have to crawl back under it and inspect lines. What is the thoughts on brands of quality lift pumps? -
J
08 lmm limp mode issues
Truck is stock other than dsp5 tune. While the tune is loaded it will show low power mode, dump the fuel filter but does not go into limp mode. Stock tune will dump a brand new filter and go into limp mode. The rail pressure will drop with wot. But catches back up after shifts. Only 120k on... -
J
08 lmm limp mode issues
No lift pump, started having issues towing so went back to stock tune and continued to have issues after awhile after. Was running wix filters as I was going through acdelco ones every 10k or less. -
J
08 lmm limp mode issues
I did the bottle test no fuel from the the relief valve -
J
08 lmm limp mode issues
hey guys I am new to this but have been reading a lot of the conversations, I got a 08 lmm 120k miles and have issues with rail pressure with or with out efi tune from Duramax tuner. went back to stock fuel filter, got a bottle test done yesterday, no fuel. have read post about soft lines...