How to replace your 4.6l & 5.4l spark plugs 1997 - 2003 f150
By dave west. i've replaced plugs on quite a few 5.4ls now (the 4.6l with plug wires is similar) and once you've done a set they really are not as bad as they look.
How To Change Spark Plugs In 2010 F150
Ford F-150 Spark Plug
Tech Feature: Servicing Ford's 3.0L Engine: Underhood Service