Quote Originally Posted by artcarney_agr View Post
I think the issue with the plugs is that they tend to break when trying to take them out. You have to be real gentle when trying to break them loose, for they have a tendency to snap and then you're in deep chit. I've got an '06 F150 with the 5.4 that's due, and I'll just take it to a dealer so if they snap they can mess with getting it right.

http://autoforum.classifieds1000.com...Plug_Nightmare
crap...scratch what i said...lol,. i was thinking 4.6 when i read that for some reason.
YEAH, DONT TOUCH THEM...lol. those are a terrible design and break all the time. i would sell truck before they need changed,lol