Question about 2000 Jeep Grand Cherokee

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Miss fire cylinder 1 & 6 on a 4 liter enginge

Hi

thanks for the answer

I have to let you know what I already did to try to solve my problem
1 ) I change the oxygene sensor
2 ) the fuel filter
3 ) the spark plugs
4 ) Clean the compression chamber with a product
5 ) all vacuum were checked
6 ) air filter was changed
7 I change 3 times the coil pack

I don't think that the coil pack could be deffective 3 times in a row

Please tell me were else coiuld I check

I will have the manifold checked tomorrow

My very best Regards

Posted by on

  • mike ryner
    mike ryner May 11, 2010

    Do you know how to check the compression in the cylinders? This can tell you if might have some burnt valves. If you do let me know what the values are.

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  • Jeep Master
  • 1,779 Answers

Did the engine light go on, and you got a miss-fire code? If so, 1st check spark plugs (which u did), then plug wires, if that's not it, the injectors would be next. Let me know how u make out
Curt

Posted on Mar 13, 2009

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