PULLING INTO PARKING SPOT I STEPPED ON THE ACCELERATOR, THE ENGINE HESITATED, THEN THE CAR ACCELERATED ON ITS OWN, CRASHED INTO GUARD RAIL - NO OTHER VEHICLES OR PERSONS INVOLVED. I TRIED TO STEP ON BRAKE, DIDN'T DO ANY GOOD. ACCELERATION STOPPED AFTER I HIT THE GUARD RAIL. TOYOTA DEALERSHIP TOLD ME IT WAS A DIRTY THROTTLE BODY - CLEANED THROTTLE BODY. *TR