Question about 1990 Pontiac Bonneville

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We changed the fuel pump on our 1990 bonnieville now it runs rough and sputters and stalls and backfires

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  • darh21 Sep 24, 2009

    will try this tomorro .. thnx guys... we are just stumped.... sputtered and died the other day ..and the fuel pump was defineatly gone...put in another one and the pump works but car still stalling and sputtering and losing power on acceleration.. it's all bad ... will try your suggestions tomoro thanx

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Make sure timing is dead on ignition timing make sure the fuel filter is not clogged
Does it have 1 fuel pump or 2 check both if it does
check the coil packs

Posted on Sep 24, 2009

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It sounds to me that you have a different problem now, sounds to be either a timing issue or plug wires elect. check to ensure that all the wires are connected properly you may have accidentally disconnected something.

Posted on Sep 24, 2009

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