1991 CHEVY CORSICA 3.1

  • Tiny
  • keith8959
  • 1991 Chevrolet Corsica

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.

Thursday, June 7th, 2007 AT 8:29 PM

1 Answer

  • Tiny
  • e40water12
  • Member

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.

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Saturday, June 9th, 2007 AT 6:02 PM

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