Spark plug gap specification for a 1991 Nissan truck?

The spark plug gap specification for a 1991 Nissan truck typically ranges from 0.040 to 0.044 inches (1.0 to 1.1 mm). However, it's always best to consult the owner's manual or a repair manual specific to your truck model for the exact gap setting, as it can vary based on the engine type and configuration. Proper gap adjustment is crucial for optimal engine performance and fuel efficiency.