VEHICLE HESITATED TO ACCELERATE WHEN THE GAS PEDAL WAS DEPRESSED FROM A STOP POSITION. INTERMITTENTLY THIS FAILURE OCCURRED WHILE DRIVING. ON ONE OCCASION, WHEN THIS FAILURE OCCURRED, IT RESULTED IN CONSUMER'S VEHICLE BEING REAR ENDED. DEALERSHIP SERVICED THE VEHICLE SEVERAL TIMES, AND PERFORMED A DIAGNOSTIC TEST, IN WHICH NO FAILURE CODE WAS FOUND. BUT THE FAILURE RECURRED. *AK