330 kPa (43 - 53 psi)
Note: No vacuum to regulator, fuel pump activated by scan tool.
Engine idling 317kPa (46 psi)
Note: Vacuum to regulator
Without Vacuum 379 kPa (39 psi)
the s-10 pump wont help, the pressure is controlled by a pressure regulator, on the concord it's in the tank and on the GM it's on the fuel rail. the chry has a one line system, no return line, if you block off the return line on a GM the pressure shoots way over 100psi, besides the PCM controls the amount of fuel that enters the cylinders so more volume or pressure won't change anything.