too much fuel pressure

[MR_MNZTR_SY]

my truck died on me a couple weeks ago and before that i had a rough idle problem for a little while that got really bad the last week or 2 before it died. ironically it died the day before i was planning on taking it to someone to check it out.

well, it turned out it was the ECM B fuse that blew but upon getting that fixed, along with a new ECM due to no communication after fuse replacement, my idle problem was still there.

i hooked a 100 psi fuel pressue gauge up to the fuel rail and started the truck. the gauge pegged and would not come down. i have an adjustable fuel pressure regulator on there (not sure what kind) and messed with that a little bit but there wasnt much change. i also found my fuel pump relay and the connector going into it starting to melt.

at that point i ran out of time but i did order a new regulator, relay, and connectors. but im going back tomorrow night, hopefully, to look at it again. anyone have any ideas or direction to point me in so im not just taking shots in the dark and throwing parts at the thing?

thanks.

 

[MR_MNZTR_SY]

Re: too much fuel pressure

i appologize if this should be in the chiping/tuning/emissions section .

 

[MR_MNZTR_SY]

Re: too much fuel pressure

try undoing the return line and running the truck. see what kinda fuel comes out of there. the best place to get that is at the back of the transmission before it goes into the tank, its just too hard to get to it at the regulator side of the line. if nothing comes out, either the line is clogged or the f.p.r is stuck closed.

 

[MR_MNZTR_SY]

Re: too much fuel pressure

hey thanks for the advice. i pulled the line and nothing came out. nothing! i went out on a limb and decided that the fpr was stuck shut and not the line so i put a new one in and in the process blew out the return line (which i dont think was clogged), installed new seals on the injectors and cleaned them real good, cleaned out my throttle body extra good, and did a coolant flush for the hell of it. now it runs like a champ. woo! ...now if only i could figure out why, after 3 years, i still have no boost...