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

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...

by in Colorado Springs, CO on August 23, 2013
1 answer 1 comment
ANSWER by on August 23, 2013
Only thing left is a vacuum leak near # 3
COMMENT by on August 23, 2013
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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