WHILE DRIVING ON A NARROW TWO-LANE ROAD, I PROCEEDED TO PASS ANOTHER VEHICLE. I ACCELERATED AND KICKED THE TRUCK INTO PASSING GEAR. THE THROTTLE WENT TO THE WIDE OPEN POSITION AND WOULD NOT RELEASE. I USED THE BRAKES TO FIGHT THE OUT OF CONTROL ENGINE AND VEHICLE. I PROCEEDED DOWN THE CURVY FOR 3 TO FOUR MILES UNTIL I GOT TO A PULLOUT PLACE WHERE I APPLIED THE BRAKES SO HARD THAT IT KILLED THE ENGINE. THE BRAKES WERE DOWN TO NO PADS, WERE VERY HOT, AND COOKED OUT GREASE THAT CAUGHT ON FIRE. I RESTARTED THE ENGINE AT WHICH TIME THE THROTTLE WAS NO LONGER STUCK IN THE WIDE OPEN POSITION. *AK