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Rough idle cold start

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Old Jul 22, 2011 | 05:17 PM
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01limited's Avatar
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From: Racine, Wisconsin
Year: 2001
Model: Cherokee
Engine: 4.0
Default Rough idle cold start

So I have been having this problem for a month now where in the morning i idles rough for about 15 to 20 seconds and then smooths right out. My check valve is bad and has been for 40 k miles. Do you guys think that would be the cause of my idle problems at startup. Does it if I crank it twice or cycle the key 3 times, makes no difference

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Old Jul 22, 2011 | 06:59 PM
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I would try cleaning the throttle body and the IAC.
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Old Jul 22, 2011 | 11:42 PM
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Did both also put new plugs in

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Old Jul 23, 2011 | 07:07 PM
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TTT

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