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1999 Grand Am 3400 v6

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  • #893930
    Conrad HutchingsConrad Hutchings
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      have a 1999 grand am that has a multiple miss fires I have changed coil packs and spark plugs and wires did compression test all between 150 up or down one or two psi also did upper and lower intake manifold gasket and put 6 new fuel injectors in it Can’t finger out why it keeps doing multiple miss firing wondering if any of you guys might now what is cozening the multiple miss firing

      Thanks Huchters358

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    • #893975
      A toyotakarlIts me
      Moderator

        May want to check fuel pressure.

        -Karl

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