What is the spark plug gap for 1999 Ford Ranger 6 cylinder 4.0 engine?
The recommended spark plug gap for a 1999 Ford Ranger 4.0L 6-cylinder engine is 0.043 to 0.047 inches (1.1 to 1.2 mm). Always double-check your owner's manual for the most accurate information, as slight variations may exist depending on specific engine variations.