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2006 Hummer H3 Question: misfiring. checked in on a diagnostic cylinder one is coded misfiring

 

Question

Visitor, Canton, OH, February 27, 2010, 18:25

do I have to replace both the coil pack and plug. Is the a problem with the head?

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  • Answer #1

    Bret Bodas from RepairPal Test Shop, February 27, 2010, 18:31
     Master

    Here is some info about the misfiring cylinder: http://repairpal.com/OBD-II-Code-P0301

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  • Medium-star Best Answer
    Visitor, October 24, 2010, 17:25

    I have a 2006 H3 Hummer and had same problem, had to change all Ignition coils on engine, easy fix same coils fit 5 cyl chevy traverse.

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