.054 inch for the 4.6 liter and 5.4 liter engines according to the 1997 Ford Expedition
Owner Guide
There 8 Spark plugs not 4.
The are no distributor cap on the 1997 Ford Expedition. You have eight coil packs one on each spark plug.
Driver's side front
No , the Ford 5.4 liter V8 engine has ALWAYS had the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils In a 1997 Ford Expedition , the 4.6 liter V8 engine uses ( 2 ) coil packs and ( 8 ) spark plug wires
Third one back on the driver's side
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
According to the 1997 Ford Expedition Owner Guide : For the 4.6 and 5.4 liter V8 engines : ( .054 inch spark plug gap ) * confirm with the Vehicle Emission Control Information ( VECI ) decal in the front of your engine compartment
( .054 inch ) according to motorcraft.com
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
Check under the hood decal info.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition