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Jeep wrangler coil pack problem

I have 2001 Jeep wrangler (6 cylinder). Engine started to idle rough and check engine light came on. The code was cyclinder 1 and 2 misfire (primary and secondary coil).
I replaced the coil rail. The codes are now cylinder 1 and 6 misfire. I changed plugs in 1 and 6, but no help. I checked resistance on the 4 four pins of the coil rail, but they all show shorted together.

Any ideas.

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  • enzeddered Dec 06, 2007

    Hi my '97 Nissan rb25de is doing the same thing, runs smoothly above 3000rpm but u can still hear it misfiring occassionally. I stopped running it asap but during tests cold idling its now emitting an alarming white smoke. have replaced plugs without success, and before moving on to replacing ignition system componentry ad hoc, I thought it might be prudent to not rule out injectors since its been run low on fuel for an extended period. idles rough, returns dett fuel consumption figures,alas, without the accompanying excess of power expected from a turbo. this is the non turbo, engine check lamp has not lit, we do not have any error codes to work with, yet.



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Replace spark plugs individually
Replace coil packs individually
Wynns for fuel injection systems/moreys/motorup etc etc
Test all fuel and injector system sensors, meters, fuses, connectors, plugs etc
Tow to automotive electrician
Learn more about automotive electrical systems

Posted on Dec 06, 2007


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