2001 FORD F-150 LARIAT..5.4 CU .IM ENGINE. MULTIPLE SPARK PLUGS SELF EXTRACT ..AFTER 50,000 MILES, CREATING POSSIBLE FIRE HAZARD. NO WARNING WHEN IT WILL OCCUR. THIS HAPPENS IN SPITE OF ROUTINE NORMAL MAINTENANCE BEING PERFORMED. WHEN THE PLUG POPS OUT IT ALSO BREAKS THE IGNITION COIL TAB FOR THIS CYLINDER THUS MAKING THE CYLINDER INOPERATIVE WITH THE POSSIBILITY OF RAW GASOLINE/ETHANOL BEING EJECTED NEXT TO A UNCONTROLLED SPARK FROM THE LOOSE COIL. VERY DANGEROUS,ESPECIALLY WITH MY WIFE AND KIDS IN THE VEHICLE. THERE HAS BEEN NO NOTIFICATION FROM FORD OF THIS POSSIBILITY. THIS HAS HAPPENED TO AT LEAST A FEW DOZEN TIMES TO VEHICLES IN MY LOCAL AREA. IN FACT, IT MUST BE A FREQUENT SITUATION BECAUSE THERE ARE AFTER MARKET REPAIR KITS.. HELI-COIL INSTALLATION (NOT A PERMANENT REPAIR). THE REPAIR FROM FORD IS TO REPLACE THE ENGINE HEADS...A $5,000.00 PLUS REPAIR COST IF PAST THE WARRANTY PERIOD. FORD WILL NOT PROVIDE ANY SATISFACTION. *TR