89 Firebird fuel pump won't run

Tiny
MADSKATERR
  • MEMBER
  • 1989 PONTIAC FIREBIRD
1989 Pontiac Firebird 305 TBI VIN E Auto 165,000mi.

Fuel pump will not run when key is turned to "on". Fuel pump will run if I manually energize it by jumping the relay. The fuel pump relay does not "click" when the key is turned on. If I remove the relay and manually apply power and ground it will "click" just fine. I checked for power at the fuel pump relay connector "C" terminal with the key in the on position and it showed battery voltage for 2 seconds as it should. The only way for me to drive my car is to manually energize the fuel pump with a jumper wire.

What else should I test? Have you had a similar problem? Any suggestions would be very helpful. Thank you
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Monday, July 9th, 2007 AT 12:17 AM

3 Replies

Tiny
W-J-A-2
  • MEMBER
SOUNDS LIKE A SHORT IN TAKE IT APART CAREFULLY! CHECK FOR LOOSE OR BARE WIRES. TEST THAT PART OF FUSE BOX FOR POWER. I HOPE IT HELPS. JACK
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Monday, July 16th, 2007 AT 10:34 PM
Tiny
RASMATAZ
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What about cranking it does it have Batt. Voltage also check your oil sending unit maybe they are tied together in the event of an accident it will kill the fuel system when there's no oil pressure. And can also be the PCM.
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Tuesday, July 24th, 2007 AT 7:31 AM
Tiny
DROOBIE69
  • MEMBER
I had the same problem
i replaced the fuel pump, fuel filter, and ecu
most likely its the computer(ecu)
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Tuesday, January 8th, 2008 AT 3:04 PM

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