The firing order is 1 - 4 - 2 - 5 - 3 - 6
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The engine cylinders / spark plug locations are numbered :
firewall
3 - 6
2 - 5
1 - 4
front
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The coil pack towers are numbered :
coil---3---4
pack--2---6
plug---1---5
The spark plug number that is in my 2003 Ford Ranger XLT is: AGSF34FP - Motorcraft.
The spark plug gap for a 1983 Ford Ranger 2.8L is .044"
For what year ?
spark plug gap on 1990 ford ranger 4.0?
For what engine ? 3.0
.054 for 4.0 V6
.044 inch for the 3.0 liter in a 2002 Ford Ranger
.042 to .046 inch (according to the 2000 Ford Ranger owners manual ) spark plug gap for the 3.0 L - V6 engine
The spark plug gap for the 2.3 litre 88 ranger is .035. This information can be found on the decal inside the engine compartment.
The 2003 Ford Ranger Owner Guide shows .052 inch to .056 inch spark plug gap for the 4.0 liter V6 engine
.054 inch
.052-.056