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Still no solution. Coil pack was replaced last week. developed a misfire on cylinder 1 so I thought it was the culmination of the hesitation issue. Replaced the coil pack and it fixed the constant cylinder 1 misfire but the hesitation issue continued. I'm down to fuel pump, EGR valve, or...

Very interesting. Do you know which wire it was? I am having the hesitation issue when I hit a bump.

Also forget to mention it will do the hesitation when I hit a bump also. Don't know if this points to anything in particular or just another crazy symptom.

Hadn't thought of that I'll pick up some HEET and give it a try.

07 JK 3.8 V6 automatic. SO lets start by detailing what the Jeep is doing. It has developed a hesitation for lack of a better word (almost feels like a misfire, but is not causing a code). The hesitation seems pretty random as it doesn't occur at the same RPM or just on acceleration. Along...