hi i got a 2007 mustang v6 with 183k auto. that sits a little rough and shakes a lot more when ac is on. the ac blows cold and the motor doesnt move when shifting gears. it runs fine once i start moving but when i stop then the shaking happens and when i shift to drive the car rumbles until i press the gas. i cleaned the throttle body and MPS also cleaned the aur intake and i changed the harmonic blancer and changed the spark plugs. i scanned it with a bluedriver scan tool but it shows no misfires so im stuck on what it could be
It sounds like the load of the AC compressor is bogging down the engine. There should be a kicker solenoid on the throttle that's activated when you turn on the AC. Check that, then check alternator output for voltage .
