THE SPARK PLUGS HAVE BEEN EJECTING THEMSELVES FROM THE ENGINE, TAKING PART OF THE CYLINDER HEAD WITH THEM MAKING REPAIRS DANGEROUS AND COSTLY. SOMETIMES THE SPARK PLUG STAYS ATTACHED TO THE COIL, CAUSING FUEL VAPORS TO IGNOTE, BUT MOST OF THE TIME THEY RIP THE COIL PACK AND BOOT OUT WITH THEM. THIS HAS HAPPENED FOUR TIMES WITH MY LAST CROWN VICTORIA AND TWICE WITH MY CURRENT ONE. IT ALWAYS HAPPENS AS THE VEHICLE HAS BEEN DRIVING DOWN THE ROAD, CAUSING A DRAMATIC LOSS OF POWER AND SOMETIMES A FIRE.