JStyner

So I have a 2007 5.9 with a six speed. The pickup is pretty well all stock. I'm getting P0148 and P0251, if I try clearing them, they come back within a few miles of driving. Sometimes when I try to take off, more so when the engine is cold, Ill get a dead pedal, and it blows some black smoke. I've had my scan tool plugged in when it does it, and I drop from about 7k in rail pressure to 3-4k, then when the pedal comes back it jumps back to 7 and up. Checked my fuel supply pressure, I had about 13 psi at ide, and about the same at WOT. I have tried changing fuel filters and the fca with no luck. Has anyone had this issue or anything similar? Looking for any suggestions or ideas, any help is much appreciated.

gcssr

U might check the wire that is routed by the ac lines at the compressor for chaffing,years back my lift pump was moved to tank, about 2 weeks later your symptoms appeared, found wire chaffing, put spiral wrap on all clear about 7/8 years now;;

JStyner

Ok thank you, I’ll take a look at that this afternoon.