I thought I had a bad fuel pump, but before I dropped the fuel tank, I checked the EFI Main Relay. I never get 12volts from the ECM to the coil for the EFI Main Relay (checked voltage at the pig tail connector red wire and back to negative battery terminal). I am checking it with ignition switch in the “on” position. If I jumper the contacts on the EFI main relay and bypass the circuit opening relay with a paper clip, I get plenty of fuel to the fuel rail. So I know my fusible link is good.
Possibly related, my check engine light does not come on when I turn the key to the on position.
My question is what would stop the ECM from sending 12v to the EFI main relay coil? Seems like I’ve read that one of the water temp switches could cause it, but I can’t find any threads referring to it in regards to fuel issues.
When I jumper both the EFI main relay and the circuit opening relay, I can get the engine to crank but it will not fire.
Possibly related, my check engine light does not come on when I turn the key to the on position.
My question is what would stop the ECM from sending 12v to the EFI main relay coil? Seems like I’ve read that one of the water temp switches could cause it, but I can’t find any threads referring to it in regards to fuel issues.
When I jumper both the EFI main relay and the circuit opening relay, I can get the engine to crank but it will not fire.