Ignition wires may fail and cause engine performance problems on Jeep Wrangler

Ignition wire failures can cause a rough idle or intermittent engine misfire and there might not be a Check Engine light.

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Average mileage: 56,266 (27,000–85,532)
Engine affected: 4.0L 6 Cylinder
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 2009
10 people reported this problem
2 people shared problem details
2009 Jeep Wrangler27,000
started running rough and would stay running. One dealer couldn't figure it out after 5 days, i towed it to another dealer and finally they noticed a burnt wire. The wires were arching and they replaced two instead of all, now at 38500 it happens again... dealer wants $400 parts/labor for wires, plugs...bought wires/plugs and did on my own.
1991 Jeep Wrangler- 4.0L 6 Cylinder85,532
engine misses throughout driving and backfires
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