2000StreetRod
Moderator Emeritus
- Joined
- May 26, 2009
- Messages
- 10,597
- Reaction score
- 334
- City, State
- Greenville, SC
- Year, Model & Trim Level
- 00 Sport FI, 03 Ltd V8
FPR & pressure
I read this entire thread from the beginning and noted that you have not replaced your fuel pressure regulator (FPR) nor have you ever actually tested your fuel pressure. I believe that you have the return fuel system with a FPR on the fuel rail and a return to the fuel tank. Here in the states the 1999 and later models have the FPR in the fuel tank and the system is returnless.
Even though you have replaced your fuel pump and fuel filter there is still the possibility that your FPR is defective. When you accelerate moderately the vacuum decreases temporarily and the FPR should increase the fuel pressure accordingly. If the vacuum diaphragm is defective the pressure may not be increasing and your engine may be starving for fuel. You stated that it is difficult for you to obtain a Schrader valve compatible gauge. I believe that you can unscrew the valve and clamp a hose over the test port. It's actually more accurate that way and many members prefer the method. Once again I strongly suggest that you test your fuel pressure with emphasis on acceleration (low vacuum) values. See my Fuel pressure test procedure
I read this entire thread from the beginning and noted that you have not replaced your fuel pressure regulator (FPR) nor have you ever actually tested your fuel pressure. I believe that you have the return fuel system with a FPR on the fuel rail and a return to the fuel tank. Here in the states the 1999 and later models have the FPR in the fuel tank and the system is returnless.
Even though you have replaced your fuel pump and fuel filter there is still the possibility that your FPR is defective. When you accelerate moderately the vacuum decreases temporarily and the FPR should increase the fuel pressure accordingly. If the vacuum diaphragm is defective the pressure may not be increasing and your engine may be starving for fuel. You stated that it is difficult for you to obtain a Schrader valve compatible gauge. I believe that you can unscrew the valve and clamp a hose over the test port. It's actually more accurate that way and many members prefer the method. Once again I strongly suggest that you test your fuel pressure with emphasis on acceleration (low vacuum) values. See my Fuel pressure test procedure