I WAS DRIVING DOWN THE INTERSTATE SLIGHTLY UPHILL. AT ABOUT 55 MPH WHEN MY SORENTO BEGAN TO LOOSE POWER/SPEED. BEFORE I COULD PULL OFF ONTO THE SHOULDER SMOKE BEGAN COMING IN THROUGH THE A.C VENTS. WHEN I REACHED THE SHOULDER AND OPENED THE HOOD THE BACK RIGHT END OF THE MOTOR WAS ON FIRE FROM THE WIRING HARNESSES. I WAS ABLE TO PUT OUT THE FIRE. UPIN A MECHANIC LOOKING AT IT I WAS TOLD IT HAD THROWN A ROD AND MOST LIKELY THE FIRE.