0.052-0.056 in. make sure the engines cold when removing the plugs on this engine,this is an aluminum head and thread damage is common. also have compressed air handy to blow the dirt and debris out of the plug wells before removing the plugs.
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
On a 1998 Ford Expedition : The 4.6 liter V8 has the Electronic Distributorless Ignition System ( EDIS ) and it has ( 2 coil packs ) along with the ( 8 spark plug wires ) ------------------------------------------------------------------------------------------------ The 5.4 liter V8 has the Coil On Plug ignition system and has ( 8 ) individual coils
Check under the hood decal info.
The spark plug gap for a 1998 Ford Explorer (V6 and V8 engines) is .054"
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
beats me
Ford Expedition.
at each spark plug
There 8 Spark plugs not 4.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
FOLLOW THE SPARK PLUG WIRES TO THE BLOCK. AND YOU WILL FIND YOUR PLUGS. A FEW OF THEM ARE HARD TO CHANGE BUT JUST PERSIST AND YOU'LL BE FINE
The 5.4 liter V8 engine , available in the 1998 Ford Expedition has a Coil On Plug ( C.O.P. ) ignition system