What is the spark plug gap on an 1990 Jeep Wrangler Four Cylinder Motor?
The recommended spark plug gap for a 1990 Jeep Wrangler with a four-cylinder engine (likely a 2.5L) is 0.035 inches (0.89 mm). However, always double-check your owner's manual for the precise specification as there might be slight variations depending on the exact engine code.