2009 E-150 4.6
Installed the new intake and buttoned it all up. The Dorman intake is a bit different in design, with one particular sore spot that I’ll explain later. Prior to that, I replaced the spark plugs, with the exception of the troublesome one. This one was actually rounded off, I think, and not spinning in place.
In an attempt to verify, I made a mark on the plug with a paint pen, and stuck a snake camera down there before and after trying to turn the plug with the wrench. Mark was in same location, so I jumped to the conclusion that it was stuck and not spinning in place. Not perfect but kicked that can down the road.
I also replaced coils and cleaned terminals in plugs. I cleaned the injectors externally only. O-rings looked okay.
That's what stops the plug socket from dropping down far enough to get the plug out
Use a long pick tool and a strong vacuum fo get the debris out
Blower nozzle with shop air works too, just make sure the crap doesn't go anywhere bad








