Car is a Prochaged 99 GT. Idols just fine when the AC is not in use. Turn on the AC and the idol dips to the point where it will stall the car sometimes. With the AC on the car feels like its bucking, as though the engine is having trouble turning the compressor. It feels like the engine computer is trying to compensate, (surging idol) at times with the AC on. I can manually feather the throttle with my foot and keep the car from stalling out. Any thoughts? I'm thinking new compressor? Thanks