I have a 91 corsica with a 3.1 multi port fuel injection the problem is no fuel pump noise when key is turned on. I have tested both fuse and relay and replaced oil pressure switch which grounds circuit. Dose the initichal charge come from the ecm and how to test it before I replace it I supplied 12volts to pump at tank plug and it runs. But it dose not run when I supply 12 volts to test lead at wiper motor. I hope its not the computer help please!
i have tested the fuse and relay I believe that the engine controle module is not sending the key on signalto the relay which completes the curcit and charges the relay.
have the same problem?
Thursday, June 7th, 2007 AT 8:29 PM
When u turn the igintion to ON position, And you dont hear the fuel pump kick on, 2 things to have to check, 1. If youre fuel pump relay works, Check the fuse. If that checks out ok. 2. U need to get pressure test done on youre fuel pump, No psi, while cranking the engine youre pump is toast, Then u need a new one.