WHILE DRIVING THE VEHICLE ON THE HIGHWAY UPON ACCELERATION THE RPMS SPIKED AND THERE WAS A CLICKING NOISE. AFTER RELEASING THE ACCELERATOR THERE WAS A LOUD NOISE LIKE A BROKEN MUFFLER THEN THE CAR LOST POWER. PULLING TO THE SHOULDER THE CAR BEGAN TO SMOKE AND SHORTLY AFTER STOPPING THE VEHICLE CAUGHT FIRE FROM SOMEWHERE UNDER THE HOOD WHICH SPREAD TO THE ENTIRE FRONT OF THE VEHICLE WHICH THEN BECAME ENGULFED IN FLAMES BEFORE A FIRE CREW COULD EXTINGUISH.