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PO306 Code on a 2007 Chevy Avalanche LT - 2007 Chevrolet Tahoe

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Misfire on cylinder number six. If it is Coil on Plug system, could be a bad coil. If it has plug wires, may be a bad plug, wire or coil. Most likely it is a coil on plug system. I would start by replacing the spark plug and coil. A remote possibility is a bad injector on that cylinder.

Posted on Dec 12, 2012

  • 1 more comment 
  • J.C. Dec 27, 2012

    Sorry for the delay...We checked coi, fuel injector, plugs and wires all were ok. We checked compression in cylinder 6 and it was 50, we determine piston rings are bad. When we pour oil down cylinder 6 spark plug the compression jump to 180, then 150, 100 and it dropped to 50. We determine bad piston rings. What do you think?

  • Bryan Webster Dec 27, 2012

    Most definitely bad piston rings or maybe at the worst, a scored cylinder wall.

  • J.C. Dec 28, 2012

    Thank you much...

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SOURCE: po306 code on a 1996 chevy lumina

the bottom crank pulley is either lose! the keyway sheared and vibrateing against the crank sensor or the bolt in the crank pulley has backed off or fell out

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SOURCE: Chevy Avalanche horn stopped working

you may have bad horn, take a test light and see if power is going to horn when horn is pushed, if theres power going to it then you have a bad horn,if theres no power to it then check the horn relay. but il bet if the fuse is good then the horns are bad.

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