Start by changing the spark plugs
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of your engine compartment ( it will show the type of spark plugs to use and the spark plug gap )
( .044 inch ) for the 5.8 L / 351 cubic inch V8 engine in a 1997 Ford F-250 , according to motorcraft.com
No spark plugs on a diesel
a 1997 f250 has 250 hp
unplug it then, unbolt it like a spark plug.
2001 Ford Truck F250 Super Duty P/U 2WD 5.4L EFI 8cylThe Spark Plug Gap.054 (In thousandths of an inch)
The spark plug gap is ( .044 inch )
28 foot pounds
There is no such thing as a 2001 f250 351 Windsor. I believe the last year of the 351 overhead valve motor was 1996.
15- 20mpg
Should, but Ford is funny about that kinda stuff.
( .044 inch ) according to motorcraft.com