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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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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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.