I have a 2004 FX4 with the 5.4L. Iv heard and now have read a lot about these spark plugs braking and what not in removing them to replace them. I need to know what I need to do so and Id also like input on a better spark plug to put in so this wont happen again. as for now im running on all 8 and have not had any problum with spark. but it is well over due on replacing my plugs so i would like to have this info soon please if anyone can give some advise and maybe picture instrustions just so I dont miss anything. thank you.

 

https://www.f150online.com/forums/v8...g-removal.html

Use Motorcraft SP515 plugs. Run some Techron in the gas prior to changing them to help burn off the carbon.