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1997 Chevrolet Astro Question: a misfire on 3 cylinder

 

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greasey auto, 4.3L V6, Hampton, VA, February 09, 2011, 08:32
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changed spark plugs and wires still misfire

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  • Answer #1

    Visitor, February 09, 2011, 09:05

    check for spark at # 3 plug, and take a compression on # 3 and one of the other cylinder and compared it. shouldnt be less then 20% different. finally check for fuel on #3 is that a single injector? might have a bad injector on #3 cylinder.

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