The 2001 Ford Ranger owners manual shows for the 2.3 L - DOHC - 4 cylinder spark plug gap ( .041 to .047 inch ) motorcraft.com website shows ( .044 inch )
.042 - .046 inch
( 8 spark plugs ) for your 2001 Ford Ranger 2.5 liter 4 cylinder ( with Fords twin plug ignition system )
The 2.3 liter in the Ford Ranger from 1989 to 1997 and the 2.5 liter from 1998 to 2001 use ( 8 ) spark plugs
The Spark plug location on the 2001 2.5 liter dohc is under the valve cover.
In a 1997 Ford Ranger : The 2.3 liter four cylinder with Fords twin plug ignition system has ( 2 coil packs ) and ( 8 ) spark plug wires for the eight sparkplugs The 3.0 liter and the 4.0 liter V6 engines have ( 1 coil pack ) and ( 6 ) spark plug wires for the six spark plugs
.042-.046 In.
www.motorcraft.com shows the spark plug gap for a 1992 Ranger 2.3 L engine as ( .044 inch )
.040 inch
.040"
.044 inch for the 3.0 liter in a 2002 Ford Ranger
spark plugs wiring diagram
.044 inch