Question about 2004 Jeep Grand Cherokee

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'04 grand cherokee limited, 4.7 ltr, quadratrack 5 speed. At idle, engine runs rough at times and at the exhaust, you can hear it missing. Had it to the Jeep dealer twice. Changed plugs, had PCM reflashed, replaced all filters, PCV valve and had injectors cleaned all to no avail. Nothing changed. Dealer mechanic tells me that all cars idle rough. I'm convinced that he has no clue as to what he's doing. I'm finished putting out over $400 a visit for poor mechanical work.

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Sounds like you have a coil or 2 arching out,they would have to watch misfire mointor on scan tool to see which cylinders are misfiring,also there is a tsb on that, requiring a reflash,but you said that was done,hopefully done right,dealer unable to find problem,what kind of tech is working on your jeep??? well good luck, hope this helps.

Posted on Oct 05, 2009

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