According to the 1998 Ford F-150 Owner Guide :
For the 5.4 liter V8 engine the spark plug gap is :
( .052 to .056 inch )
* confirm with the Vehicle Emission Control Information ( VECI ) decal located in the front of your engine compartment
The gap is .54"
Spark plug gap is .054. 54 thousandths of an inch.
.54 Gap
.54 is the gap on the tracer
is 54 gap for a spark plug mercury mountanier 2002 4.6
54
54 thousands of an inch i think
this depends on the spark plug you use. If you use autolite spark plugs you will need to gap them to 54 thousandths.
.54 Thousands........
Per my ford dealer service dept. .54 is best overall gap.
.54 inches
No, propane does not require a smaller spark plug gap. The spark plug gap should be set based on the manufacturer's recommendations for the specific engine, regardless of the fuel being used. It is important to follow the spark plug gap specified for the engine to ensure proper combustion and performance.