WAS DRIVING AT RELATIVELY LOW HIGHWAY SPEED (50MPH) UP A SMALL INCLINE. LOW RPM (1200RPM). WITH SHARP HIGHWAY CURVE COMING UP, VEHICLE STALLED FOR NO REASON. STEERING BECAME UNRESPONSIVE. TURNED KEY OFF AND ON SEVERAL TIMES TRYING TO TURN STEERING TO FOLLOW CURVE. LUCKILY SUNDAY NIGHT TRAFFIC WAS LIGHT OR COULD HAVE RESULTED IN ACCIDENT. ENGINE FINALLY STARTED UP AND STEERING PRESSURE WAS RESTORED. KEPT RPM OVER 2500RPM FOR A COUPLE OF MINUTES AND CAR BUCKED A NUMBER OF TIMES IN THE FIRST 5 OR SO MINUTES. RAN SMOOTHLY AFTERWARDS WITH ENGINE RPM KEPT HIGHER (2500+). HAD TO GET OFF THE HIGHWAY AND FOLLOW SIDE STREETS TO GET HOME. THIS PROBLEM HAS BEEN OCCURRING FOR 3000-4000 MILES AND I'VE HAD NEARLY EVERYTHING REPLACED, COIL, SPARK PLUGS, PLUG WIRES, DISTRIBUTOR ROTOR, DISTRIBUTOR CAP, STARTING ON SENSORS NOW. *TR