2004 grand Cherokee 4.0 studdering/misfiring/loss of power - Jeep Garage - Jeep Forum

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Old 05-13-2017, 07:43 AM
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2004 grand Cherokee 4.0 studdering/misfiring/loss of power

As title states, I have a 2004 Jeep Grand Cherokee with the 4.0I6. I'm having random loss of power/misfiring. Not really sure how to describe it. It seems to happen mostly when the engine is warm and its warmer weather. I will be driving and then all the sudden it looses power. When it does this and you try to give it gas I can feel it try to speed up but it backfires, jumps and sputters, No CEL, no codes, nothing to help with the diagnosis. I am at my wits end with this. It has been going on for about 2 years now. I have replaced the coil pack, although it was a cheap one from Amazon, I do plan on replacing it with a name brand from O'Reillys.

Any help would be appreciated.

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