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COP system Coil on Plug. Coils are located on the top of the spark plugs
i know if you have the 5.4L V8 you will have coil packs. not spark plugs
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
f150 ignition coil sequence
The plugs and coil packs are located on top of the engine. If you look at the fuel rails ( they are silver in color ) which will be on both sides of the throttle body the small coil packs are located under them. Use caution when R&R the plugs and packs not to break the clips holding them and damage the fuel rails.
They are on top of the cylinder head below the coil packs. If you are replacing them it will be BEST to use Motorcraft plugs and to put anti-seize on the threads.
The 2005 F150 5.4 L 3V engine takes 7 quarts with engine oil filter change , according to the Owner Guide
coil----3---4 pack---2---6 plug----1---5
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
autozone.com shows for a 1997 F-150 truck ( 4.6 L V8 engine ) COIL PACK NUMBERING : ( 6 - 3 )-----( 7 - 2 ) ( 1 - 5 )-----( 4 - 8 ) ---front of engine---
get a psray bottle and spray all packs with water look for a spark the one that sparks is bad or being very careful pull each plug wire off the coil until you find one that isn't sparking
According to the maintenance guide at 100,000km