The spark plug gap for a 1991 Dodge Dakota depends on the engine size. You'll need to consult your owner's manual for the precise specification. The manual will list the gap for each engine option (e.g., 2.5L, 3.9L, etc.) offered that year.
Without knowing the engine size, I can't give you the correct gap. A general range might be between 0.035" and 0.045", but that's not guaranteed to be correct for your specific Dakota. Always refer to your owner's manual.
