Mechanics

ROUGH IDLE

2003 Jeep Liberty • 200,000 miles

Vehicle looses power going up hills. Rough start from complete stop until gas pedal is pushed half way down. Check engine light continuously flashes while idling or driving. Codes in computer are multiple misfires cylinders 1-6 all. Plus both downstream o2 sensors heated. I was told two answers. And the 3.7 is coil over plug on all 6 cylinders. Thank you. Bill.
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Wcarpenter
April 12, 2013.




How long since plugs/coils?

I would also do a compression test.

From all these failures, I would look closely at wiring harness for damage

Roy

ASEMaster6371
Apr 13, 2013.


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