No fuel pressure when engine is turned off

[J Speak]

There is no fuel pressure when I turn the engine off.It go from 42 to 0. Could this be the injectors ? Thanks

 

[pacecarta]

do you smell gas around the car (a leaking return fuel line) ?

try clamping the return line to block flow and if pressure stays longer then the fuel pressure regulator is leaking internally , if still dops then possibly injectors (you would get big puff of smoke on startup, do you ?) otherwise the fuel pumps internal check vave is leaking or if an aftermarket pump is in tank the short hose in the tank could be leaking

easiest is to swap in a fuel pressure regulator and eliminate it as a source

 

[oehm]

I had the same problem. Turned out to be the check vavlve in the fuel pump.

 

[TurboBusa]

i also had this problem. it was the hose clamps that hold the rubber hose to the fuel pump and pick up tube. it loosened up, it also would not let me raise the pressure.

 

[J Speak]

I have an aftermarket pump and fuel regulator.I can adjust the fuel pressure up or down. I will check all of the items you listed and I will get back thanks Justin.