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Posted on Jan 14, 2011
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03 envoy SLT 4.2 eng. Miss firing in #5 Engine is nocking feels like it wants to shut off .....any ideas besides sprkplgs, & cables ......? Lost w/ out a clue....n anaheim. Help if u can....!lol

  • carrillog81 Jan 26, 2011

    EXactly the answer.... Cost me 70 bucks...not 350 like the,guy wanted to charge

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  • Posted on Jan 14, 2011
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Joined: Jan 02, 2011
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A BAD COIL PACK WILL CAUSE THIS PROBLEM.NOT LETTING ALL CYLINDERS FIRE WILL CAUSE ENGINE TO KNOCK.

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