Originally Posted by HarleyBaby
I just checked the fuel pressure at the fuel rail. 0 pressure with car shut off, then I started car and it rose to 28 lbs. of pressure, and when I shut it off, by the time i got to the front of the car, it was already o again. Anyone know what the regular pressure is supposed to be? So there is a check valve in the fuel pump? I was thinking that since the pressure regulator is also the fuel filter, and thats where the excess fuel goes, back thru the fuel filter, that that may be the problem. I just replaced about 1 month ago. Thats when I started having problems, about 3 days after i changed it. Any thoughts on that. I hate to change the pump if thats not the problem,
Dave
That's right. The pump runs for a few seconds then waits for the car to start to resume pumping. Your check valve is stuck open in the pump. If you quickly turn the key (cold start) without priming the car it it starts right up right? Replace your pump or just live with it.
That pressure seems low too. should be about 55psi with the car running.