2010 Jeep Jk mountain edition idle and running rough - Jeep Garage - Jeep Forum

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Old 04-12-2015, 09:25 AM
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Question 2010 Jeep Jk mountain edition idle and running rough

I have a 2010 Jk mountain edition and I have a cold air intake as well as a dynomax dual exhaust with a 3in lift. Been having a weird noise after I cruised along down the road at about 40-50kms/hour in cruise control. The weather here is mild and steady at about -11*C. When I restarted it and removed the cylinder heads her idle was fluctuating and a slight knocking sound was heard but the knocking went away when we put the heads backs on? I was also able to drive her back home and after I while I started her up again low and behold she was now idling high low high low high low? Perplexing......need advice.....wtd

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Old 04-12-2015, 09:28 AM
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Re: 2010 Jeep Jk mountain edition idle and running rough

The check engine light never turned on nor presented itself as a problem in this case. I did have that blinking "lightning" sign go on and and off....
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