a parts store like autozone or advance can tell
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"
( .044 inch ) according to motorcraft . com
For what year ?
spark plug gap on 1990 ford ranger 4.0?
Check the Vehicle Emission 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 )
.054 for 4.0 V6
For what engine ? 3.0
.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 owners manual shows a spark plug gap of (.052 - .056 inch) for the 4.0 L - SOHC - V6 engine , but Motorcraft.com ( one of Fords websites ) shows ( .065 inch ) for the 2001 to 2004 Ford Ranger 4.0 L - SOHC - V6 Ford states that the website is updated daily - confusing !