I have a 5.3 3v with a P-1 and it is consistantly losing fuel pressure. I'm using the GT500 fuel pump with Kenne Bell boost-a-pump. At 5000 RPM's the fuel pressure is at 30psi and 80% duty cycle. My orginal GT500 fuel pump had one pump go out and had it replaced. I have also tried replacing both FPDM's. Any ideas cause i have none.
