I just read a blurb that says it takes 6 hours in a shop to change plugs on a 2007 F-150 with a 5.4?
truth ?

 

well, its not quite that bad. The "original" spark plugs were two piece in 2005- 2006 ( possibly 2007?) and some snap in half during removal. You need a special tool to get those broken parts out.. If your plugs were changed at 100K miles and you have the newer style plugs, that should not happen. The plugs are buried under the COPS and several items need to be removed for access. 6 hours would assume you ran into some problems.

 

https://www.ford-trucks.com/forums/1...-breakage.html

 

Changed plugs and fuel filter today it runs even worse now?
Looking at plugged CAT's tomorrow , then after that who knows?
Maybe weak fuel pump , no way to test pressure.

 

2 plugged CATS it seems to be better but still has a bit of a miss.