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2001 buick Lesabre random misfired

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  • #659542
    Eliud MunozEliud Munoz
    Participant

      random misfire found out 2 and 5 coil is not sparking replaced coil still no spark engine 3.8

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    • #659557
      Dave TidmanDave Tidman
      Participant

        what codes are you getting? Is it a p300? or is it a P302 and P305?

        Probably the next step is to look at the control signal coming from teh ECM to see
        if that is correct.

        #659561
        none nonenone
        Participant

          The ignition control module is a common failure part, but it’s expensive. So don’t replace it unless you know that’s the problem.

          #659580
          BrianBrian
          Participant

            The coils you replaced, were they replaced with new ones? I know some of the cheaper new ones are made in Poland and other eastern block countries and not made well. Have you had the charging system checked? Slightly low voltage will allow it to crank and run, but poorly. Check all upper and lower connections for the battery cables.

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