Question about 1990 Buick Century

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Uneven idol backfire on acceleration - 1990 Buick Century

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  • yadayada
    yadayada Aug 04, 2010

    have the spark plug wires ever been replaced? if u have done any work please let me know

  • goathair68 Aug 04, 2010

    It's not a solid miss, think it might be a fuel delivery problem. Have changed filter.

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  • 52 Answers

Get valves adjusted thats why miss fireing its poping back threw mana fold

Posted on Aug 04, 2010

  • wesley mcgriff
    wesley mcgriff Aug 04, 2010

    u valves our miss fireing or u blew a valve

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When under acceleration, an engine experiences increased cylinder pressures. If you have a spark plug(s) that is in poor condition, it can misfire (or not fire) then, so the unburned fuel will ignite in the exhaust, and "backfire".

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