CAR SUDDENLY ACCELERATES LIKE CRUISE CONTROL ENGAGES(CRUISE CONTROL IS OFF) AND UNABLE TO DISENGAGE BY APPLING BRAKES.DEALER HAS BEEN UNABLE TO DETERMINE EXACT CAUSE.LATEST INCIDENT HAPPENED WHILE TURNING CORNER, CAUSING CAR TO ACCELERATE WHILE FOOT WAS ON BRAKE AND CROSS OVER CENTER LINE,SLIDING IN GRAVEL, STRIKING TREE ON OPPOSENT SIDE OF ROADWAY. THE TPS HAS BEEN REPLACED TWICE AND THE ECM AND IGNITION LOCK REPLACED ONCE.*AK