.052 to .056 inch ( 1.3 to 1.4 mm )
In a 2002 Ford Expedition : ( No , not really ) both the 4.6 and the 5.4 have the Coil On Plug ( C.O.P. ) ignition system , but there is a connection between the individual coil and the spark plug
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
How to Change Spark Plugs on 4.6 & 5.4 Liter Check related link below
Check under the hood decal info.
I beleve it is stamped right on the exaust manafold.. on the drivers side
FIREWALL 4 - 8 3 - 7 2 - 6 1 - 5 FRONT
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
My 2002 Ford Focus ZX3 has a spark plug gap of .050" (1.3mm).
What is spark plug gap on 2002 Ford Focus 2.0L SOHC engine? It would be in your owner's manual and it is 0.054 in.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front ( there is a coil above each spark plug )
Ford Expedition.
at each spark plug