I HAVE A 2004 F-150 THAT HAS SPIT TWO SPARK PLUGS OUT WITH IN A YEAR. THE SECOND ONE CAUGHT FIRE . THERE HAS BEEN THIS ISSUE WITH MANY OWNERS OF FORD TRUCKS AND IS A ON GOING ISSUE FORD WON'T TAKE CARE OF. NAPA AUTO PARTS HAS A REPAIR KIT MADE JUST FOR THIS ISSUE WITH FORD ENGINES. THE COST IS $ 73.00 PLUS HAVING SOMEONE DO THE REPAIR. *TR