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2002 Ford Escape Question: check engine po303 cylinder 3 misfire only occurs under idle while ac is on

 

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mcreynoldsscott, 3.0L V6, Colorado Springs, CO, August 23, 2013, 20:43
 Rookie

changed cop/compression tested/noid test/ohm test all good.reset and code returns when ac is applied at idle for extended time. rough idle and jerky. misfire...

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  • Answer #1

    pushrod August 23, 2013, 20:59
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     Master

    Only thing left is a vacuum leak near # 3

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    mcreynoldsscott, August 23, 2013, 21:14
     Rookie

    probably the only thing I haven't checked for yet, however the engine runs smooth under all conditions,until the ac is applied. I will try the vacuum leak angle just to be sure. Thank you for the quick response.

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