Ford Mustang vibrates, loss of power with A/C on?

drxmolson

New member
I have a 2003 Ford Mustang 3.8 V6 Automatic with 100,000 miles on it. Lately with the A/C on, I notice the acceleration is very sluggish, like it takes the car forever to get up to speed. Also, if you rev the car in park, somewhere between 1500-2000 RPM I notice a bad vibration. It even makes the steering wheel vibrate pretty good. The car runs fine other than the fact that engine ticks a bit. Any ideas what is going on? Also, the same vibration is there when you are driving the car at 35 MPH or so and it is just about to shift into over drive. The transmission was just replaced with a rebuilt and it seems fine.
 
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