ENTERED THE FREEWAY AND AFTER REACHING SPEED OF APPROXIMATELY 55-60 MPH I HEARD A LOUD SOUND THAT SOUNDED LIKE A SMALL EXPLOSION. SOMEONE DRIVING IN THE LANE NEXT TO ME BEGAN FRANTICALLY POINTING AT THE ENGINE OF MY CAR. IMMEDIATELY I SAW SMOKE AND FLAMES COMING FROM UNDERNEATH THE CAR'S HOOD. I PULLED OFF THE EXIT THAT I WAS APPROACHING, PARKED THE CAR AT THE CURB, JUMPED OUT THE CAR, DIALED 911. FIRE DEPARTMENT RESPONDED IN A COUPLE OF MINUTES AND BY THIS TIME ENTIRE ENGINE AND HOOD WAS ON FIRE.THEY PUT THE FIRE OUT. CAR WAS NOT ABLE TO BE PLACED IN NEUTRAL OR ANY OTHER GEAR, BUT WAS STILL TOWED TO THE DEALERSHIP THAT PERFORMED REPAIRS TO FUEL INJECTORS AND OTHER COMPONENTS OF THE ENGINE ON FEBRUARY 2, 2016. DURING FEB. 2016 INCIDENT THE GAS PEDAL WOULD NOT GIVE POWER TO MAKE THE CAR ACCELERATE, CAR STARTED SMOKING AND GIVING OFF FUMES THAT SMELLED LIKE BURNING PLASTIC. CAR REPAIRS WERE MADE IN THAT INCIDENT. GOING TO HAVE DIAGNOSTIC PERFORMED TO RESEARCH IF THERE IS A CONNECTION/RELATION BETWEEN FEBRUARY 2016 INCIDENT AND JUNE 2016 INCIDENT.