Check the Vehicle Emissions Control Information ( VECI ) decal
located in the front of the engine compartment ( it will show the
type of spark plugs to use and the spark plug gap )
the gap spec is .054
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
spark plug gap is .032
Check under the hood decal info.
( .054 inch ) according to the 1997 Ford Expedition Owner Guide
.052 - .056 inch
.054 inch for the 4.6 liter and 5.4 liter engines according to the 1997 Ford Expedition Owner Guide
The proper gap for the 2000 2.5L Ford Ranger is .044"
.044 inch , according to ford parts . com ( it should show the spark plug gap on the vehicle emission control information decal in the engine compartment )
The proper gap for the engine 2.0 zetec DOCH on ford is 0.43mm.
the gap spec is .044 for 2brl 302 eng.
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