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slow drop in fuel pressure
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Question
CaptainChad
Aloha,
been having this problem with my 01 2500 6.0L for MONTHS! Im pulling my hair out!
The truck runs great when its on, however when I turn it off, the fuel pressure slowly falls. all the way to 0. New Fuel pump installed, new fuel line, new fuel filter, new injectors, plugs, wires, new fuel pump regulator, new ignition, and I even installed a second check valve in the fuel line above the fuel pump to eliminate the possibility of the fuel pump check valve being the issue. The truck take 2-3 times to start. Ive even pulled up the fuel injectors and checked for leaks, I did find a few leaky injectors and switched those out. I still cannot find where the fuel pressure is going. no fuel coming out of the FMR vacuum hose. The FPR is not OEM, could this still be the problem? I pinched the fuel return line and checked fuel pressure and it still leaks down slowly. My gut is telling me its the off market FPR? im not seeing any fuel coming from the injectors when I lift them from the holes. PLEASE help!!!!!!
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