Does anyone know how much fuel would be missing if my fpr didnt increase pressure when under boost,thanks Roy.

 

Well I don't know if this will anwser your Q, but you should have 1psi more fuel pressure for every psi of boost.

10psi of boost -> 50psi of fuel pressure.

I don't think you car would let you boost if you FPR wasn't allowing for more pressure??? I don't know though.

 

The computor may control the solenoid to the FPR but there is not a fuel pressure sensor to tell the computer the pressure out put. If the FPR is dragging on the ground behind the car , the computor will not know.