Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer and allowing me to assist you . Have you done a fuel flow test ? And have you replaced the fuel filter?
Thats correct but if you are positive there are no leaks and you replaced the pressure control valve on the fuel rail then it has to be the new pump not putting out enough pressure are all these parts OME or after market?
ok thanx for that info no I don't believe the filer is the problem because it would just reduce flow not pressure.I then am leaning to the pressure control valve , Just for the hell of it where are you hooked up reading the fuel pressure?
Ok thanx for that input. this is what to do to take the guess work out of the equation. this is what we do in the shop to take the guess work out of what the problem is. hook up the gauge on the pump side of the fuel filter and read that pressure , if it's still low it's defiantly the pump, if not hook it up in front of the fuel filter just to eliminate that as well if those two check out then what's left? you got it a week spring in the fuel regulator at the end of the fuel rail. logic Process of elimination rather then guessing.Hope this does the trick for you in pinpointing your problem. If you require further assistance I'll be happy to do so.
they would have to be leaking pretty bad to drop the pressure that bad. Thought you did a leak test? just run to pressure and shut off and see how long it takes for the pressure to drop. but do those pressure checks as I suggested it will eliminate all possibilities.
very well and good luck . Doing those checks will show you where the problem is.