I have a random misfire when engine is warm at idle. The strange part is it will only do it with the ac on. I’ve spoke with Yeti and he doesn’t believe it’s tune related. I have changed the fuel filter and the problem didn’t change. Thanks for any ideas with what’s happening in advance.

Does the miss happen every time the AC compressor engages?

Every time the compressor engages it will cause a slight change in engine rpm.

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U.S. Army Retired

That could be what is going on with it. Today when it missed I turned the ac off and it quit. I know it’s ac related but didn’t think it would miss when the compressor kicked on.

That could be what is going on with it. Today when it missed I turned the ac off and it quit. I know it’s ac related but didn’t think it would miss when the compressor kicked on.