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2007 GMC Yukon XL 1500 Question: what is causing cylinder not to fire

 

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peelerg, Nashville, TN, December 31, 2012, 11:10
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# 4 cylinder not firing changed plug and wires coil pack is firing cylinder is still missing

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    December 31, 2012, 11:19
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     Journeyman

    maybe there is something else wrong with the cylinder

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    pushrod, December 31, 2012, 14:54
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     Master

    I agree, maybe compression, vacuum leak or you have an injector problem.

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  • Answer #2

    January 01, 2013, 09:50
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     Master

    Have an injector balance test performed i bet # 4 is not going to pass!

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