The spark plug gap for a Ford E-250 van with a V6 engine will vary slightly depending on the year and specific engine. You should always consult your owner's manual for the precise specification.
However, a common range for Ford V6 engines of that era is 0.040 to 0.044 inches (1.02 to 1.12 mm). Again, this is a general range, and your owner's manual is the definitive source. Using the wrong gap can affect performance and engine longevity.
