WHILE DRIVING ON A MAJOR HIGHWAY MY CAR STALLED. THE CAR BEGAN TO DECREASE IN SPEED AND SHAKE PROFOUNDLY. THERE WERE NO WARNING LIGHTS ON TO INDICATE THE PROBLEM WITH THE CAR. MORE PRESSURE WAS APPLIED TO THE GAS PEDAL AND STILL NO INCREASE IN SPEED. AFTER SEVERAL ATTEMPTS TO ACCELERATE THE CAR INCREASED TO 40 MPH AND THEN CONTINUED TO DECREASE IN SPEED. I PULLED OFF TO THE SIDE OF THE HIGHWAY WERE MY CAR WAS STRUCK BY ANOTHER VEHICLE. AFTER THE INCIDENT THE CAR DID START AND ACCELERATED AS IF NOTHING EVER HAPPENED.*JB