|
This may seem a bit odd....GM used the Oil Pressure Sending unit as a power supply to the fuel pump once the O/P was above 6-10 psi as a back up to the fuel pump relay. If the fuel pump relay is bad you would have an extended crank until the oil pressure came up and supplied voltage to the fuel pump. It is possible that you have both a bad fuel pump relay and a bad oil pressure sending unit.
|