I have been banging my head on the wall about my fuel pressure
. In the last week I have twice replaced the fuel pump with a new one and both times got the car to fire up and drive perfectly for about a mile. After that it choked and died. Then I went back and put the OEM pump back in and it did the same thing.
I am only getting about 5-10psi of fuel pressure at the rail which leads me to think either fuel pump or pressure regulator. I am leaning towards the pump/assembly. I just bought the whole pump assembly for about $300 because 1) every time I replace just the pump the car works so it makes me think it is something related to that piece, 2) my fuel gauge does not keep accurate reading & the sending unit was tested bad, 3) my low fuel warning light does not turn on (it is also wired through the sending assembly).
I hope this is the right move. I ordered it online but haven't received or installed yet. Maybe you have suggestions?
My one concerns is my voltage at the pump. I did already replace my relay and am getting about 11.57 volts to the pump
. Is that enough to fully power the pump and get full pressure? My pump turns on (audibly) and runs (fuel is moving to the motor). But, I have read that the volts need to be at 12v at the pump. Is 11.57v too low? Or sufficient?
Any help would be appreciated! Thanks!