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Unread 12-28-2012, 10:34 PM   #1
davelar357
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Join Date: Dec 2012
Posts: 4
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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Unread 12-28-2012, 11:27 PM   #2
ratfink41
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Join Date: Jul 2012
Location: annapolis, MD
Posts: 25
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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Unread 12-30-2012, 03:52 PM   #3
davelar357
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Join Date: Dec 2012
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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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