Rough idle 2001 Jeep Grand Cherokee -
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post #1 of 3 Old 12-28-2012, 11:34 PM Thread Starter
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Rough idle 2001 Jeep Grand Cherokee

I have a 2001 Jeep Grand Cherokee 4.0 V6. Possibly over heated but no knocking noise... Due to over heating i replaced the radiator however, once i started the engine it felt as though it was miss firing. I replaced plugs, coil pack and crank sensor... Still feels like its miss firing... Any advise or suggestions on what else i can check???

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post #2 of 3 Old 12-29-2012, 12:27 AM
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My buddy had this problem on his ranger, cracked head, might wanna pop it off if possible and take a look
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post #3 of 3 Old 12-30-2012, 04:52 PM Thread Starter
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Yeah... You're right...its the heads! Tested the compression on the pistons... 50, 75, 100, 150, 150, 150...
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