Question about 2004 Chevrolet Silverado

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2001 Silverado has a miss. Plugs and wires have been replaced. No codes are showing. I am betting on ignition coil. How would you find which one. Any other suggestions.

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  • Brad Rabon May 11, 2010

    is the truck overheating at all? u could find a shop whose scantool has a misfire monitor that will show which cylinder is missing or the shadetree mechanic way, with the truck off un hook all 8 or 6 plug wires, then gentle set them in the plug hole just enough that they barley touch the plug. then crank truck pull each one off one at a time, the plug where truck doesn't change thats the cylinder that is skipping, thats the bad coil.

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Buy a spark plug test light at the auto parts store costs 5 to 10 bucks put the plug tester on eash wire then startthe car up and watch the light if it hasa constan arc then it's fine move to the next plug wire and do this proceedure till you find one with an intermant spark if you find one follow that wire to that coil pack and that would be the coil to replace. Note A bad valve or sticking valve can casue this to also a bad fuel injector or rings and last but not least an intake leak on the cylinder. Please rate if this was helpful.

Posted on Aug 07, 2009

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