Hello everyone. I have a 2012 mustang v6. I've been having an issue for quite a long time and I didn't realize what it was until recently. When the ac is on and the vehicle is at idle (stop light, parking lot etc..) the engine will sputter and I can feel the car shake roughly for a split second before returning to normal. This has been happening for several months now but the ac just went out so I've been driving with the air off and windows down and realized the car is running butter smooth at stops.

I should also mention that that when I am running the air it will kick on cold for about 10 seconds randomly and then go back to warm & musty fan air.

In short, the car is running rough (sputtering and shaking) only with the ac on and just recently stopped blowing out cold air.

I appreciate everyone's help.