If you go to f150online.com and search , you will find that this is a big issue with these engines.Cleaning the fuel system is one of the ways to free up the plugs. It seems like everybody is breaking at least one off in the block.If you go with the champion one piece, you dont have to think about it. With the two piece plugs you need to break them loose every 20,000 miles. I have 86000 on my 06 F150 and last week ravenel ford wanted$475 too swap plugs and $30 for each plug that breaks in the block when they take the plugs out. The best way to go is to order that special tool that removes the broken plugs for $70 from napa. Buy the $100-115 plugs and do it yourself.
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