Question about 1996 Pontiac Firebird

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The fuel pump on my 1995 Firebird Formula quit running. I've even tried feeding 12v directly to the grey wire on the fuel pump relay and it still doesn't run. Can a generic fuel pump be installed under the hood by splicing into the fuel line? Can the gas be sucked through the bad pump in the gas tank? Thanks!

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No, the fuel pump in the tank needs to be replaced. It's not too bad to remove the tank, hopefully you don't have much gas in there though.

Good Luck!

Posted on May 27, 2011

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Fuel pump testing


Yes the gray wire goes from the relay to the pump, and the black wire grounds the pump.
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While you have the pump out you should fix the gauge too if you can.

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No, he's mistaken. He's talking about the fuel pump, Paul. There should be an online wiring diagram for that air pump. But I'm not all that proficient in searching.
I'd like to ask where is the pump located? Is it in the engine bay? At any rate, the power to the pump comes directly from that relay. Did you check the relay thouroughly? Be certain it's good. Line out to pump should collect with an available harness till you found the connector there at the pump.
Maybe I'm rambling too much. I used to visit the Buick dealership in Great Falls, MT when I owned a few GM cars. The shop foreman would let me look at factory service manuals of any past years they still had. I even made copies of a few pages, think mostly wiring diagrams, but it was a great source.
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I would check the ground for the fuel pump relay that operates the switch side of the relay.
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A relay is needed because you don't want heavy current going through the switch.

Also, most cars only run the fuel pump for 2 seconds when the key is turned on because you don't want the fuel pump running without the car running. If you listen closely at the fuel tank, you should hear the pump run for 2 seconds when you turn the key to "ON"
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