CONSUMER WAS TRAVELING ON HIGHWAY AND VEHICLE STALLED WITHOUT PRIOR WARNING. HAD TO AVOID A TRUCK AND WENT INTO A DITCH. DEALERSHIP REPLACED IAC VALVE) TWICE. ON FEBRUARY 17 A MASS AIR FLOW SENSOR WAS REPLACED. ALSO, PROCESSOR COMPUTER CHIP REPLACED, AND STEERING WHEEL LOCKED UP. VEHICLE HAD EARLIER PROBLEMS THA WERE STILL EXISTING. *AK