Yeah this is typical of FD's when the throttle control gets loose and there is a simple fix. I think it's called the throttle positioning screw or TPS or something like that. I totally forget what it's all called but I had to do it to my car once because it would stall out too after I got my a/c fixed. I don't have my car right now but it's a little screw by the throttle control that you have to turn witn a flat head screw driver slightly to raise the idle a little bit. Remember if the car is stock it should idle at approx. 750 rpms with no accessories on.