Misfire on all cylinders except one

[Brahmajoe]

I hooked up JScan and got multiple misfires on all cylinders except cylinder 6. 1 and 3 had the most but 6 had zero. Is this normal?

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[Hootbro]

Yeah, that is about normal, especially on a cold start. Unless the CEL throws a code, I would not dwell on it.

 

[Brahmajoe]

I have a vibration at idle I’ve been trying to figure out. Pain in the ass

 

[Hootbro]

Like what kind of counts per cylinder? Usually low double digits at start is not a big thing but if after warm up it is ticking off missfire counts steadily, then there may be an issue.

Jeep has remapped the PCM's more than a few times since launch to factor in larger margins of in use misfires to not pop the CEL.

If you got a shudder and a misfire count climbing, I would take it in to have looked at.

 

[Brahmajoe]

I did they can’t find anything..go figure.

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