If you think it is a fuel issue, use a gage and check fuel pressure. Some of the national brand auto stores used to loan out a fuel pressure gage, if you don't have one. As far as the oil pressure switch in the fuel pump circuit, that is a redundant power supply to the pump. As long as the fuel pump relay and circuits are functional, rpm signal present, engine cranking, the pump should run regardless of o/p switch. At the fuel pump connector, the gray wire is voltage for fuel pump motor. Any applicable trouble codes. You should be able to check mil codes, yourself.
Tuesday, August 3rd, 2010 AT 11:03 AM