I have a 2010 Ford Escape and for a few years I've noticed that when the AC is on, the car idles very rough when in drive. If it's in park or neutral and the AC is running it's as smooth as silk. Driving it with the AC on I don't notice the shaking, but when I'm waiting at a red light for example, it can get annoying.
I've told the dealer about this in the past who seems to think that this is normal/acceptable, but I'd like to get rid of this issue. The car has near 90K miles on it and aside from this issue, is great. Anything I should be looking at or recommending they check? The AC itself runs fine and is very cold. Also, the RPMs seem steady when this happens.