EJECTED SPARK PLUG RUPTURING THE FUEL RAIL CATCHING THE TRUCK ON FIRE, BURNING IT TO A CRISP. HAPPENED 4 TIMES, (EJECTING THE PLUG) THE FIRST TIME THE FORD DEALER REPAIRED IT. WE WERE DRIVING IT DOWN THE ROAD HEARD A BANG THAN A HISS OF THE FUEL LEAKING GOT THE TRUCK STOPPED AND JUST GOT OUT IN TIME. FULL FLAMES IN LESS THAN 2 MINUTES.