Misfire in all cylinders

Sweetjones228 · Nov 16, 2024

I recently changed all the coils and spark plugs, but it still saying that all six are misfiring any idea or anyone else ever dealt with this issue?

Could the 02 sensor cause this?

LibertyTC · Nov 17, 2024

What spark plugs did you install? Jeep likes copper core ZFR 6F-11G gap set at .040
Which brand of coil packs did you install? I used Standard Brand coil packs with no issues.
What OBD 2 codes are you getting?

Sweetjones228 · Nov 17, 2024

LibertyTC said:
What spark plugs did you install? Jeep likes copper core ZFR 6F-11G gap set at .040
Which brand of coil packs did you install? I used Standard Brand coil packs with no issues.
What OBD 2 codes are you getting?

I brought them set already on .040.
Car quest was the brand of the coils.

It was 16 different codes. 02 sensors, coils and misfires.

dtennes · Nov 18, 2024

"...t it still saying that all six are misfiring..."

Please clarify, was the Jeep already misfiring on all cyls before you changed the plugs and coils?

dtennes · Nov 18, 2024

Also, after you did all this work did you perform a reset on the PCM/ECU (engine computer)? If "no", do this before you touch anything else:

https://www.jeepkj.com/threads/misf...-which-fully-clears-adaptive-numerator.80979/

Misfire in all cylinders

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