SOMEONE PLEASE ANY ANSWERS ON THIS so im new to this site but i had a loose plug on my 06 f150 so i tightened it and that was on cyl number two then i started up the truck and noise went away that i had but then it started running like crap and had a cyl 1 misfire but i changed all coils previously the month before to msd coils but needless to say changed coils swapped them aroung problem still happening lost on this

 

Chris- Loose plug on a 3V 5.4? You can't get them suckers out, how did one ever come loose??? BTW, we're lost on the spelling and punctuation. Probably get more response if people could actually understand what you were asking.

 

Sorry on spelling and punctuation. But, I found problem anyhow apparently plugs from the auto parts store are crap. The ones I put in two weeks ago from the auto parts store were auto light ht 1 guess fords actually are better. Problem solved but thanks for the reply appreciate it