Stalling and chugging

Hi. I have been having on/off car problems with my 1995 geo prizm since Septemebr. It would shake, lose acceleration, and stall at stop signs or red lights. I had distributor cap, rotor, spark plugs, and coil replaced. Used fuel injector cleaner. I had two mechanics check out the car and was finally told I need a new computer system. A mechanic upped the rpm's for me and the car was fine for two weeks. Today, it would not start and I had to jump the car. A friend mentioned that a bad a/c compressor clutch could cause the symptoms my car was having- stalling, chugging, etc. Any advice? Thanks.