What is gap on spark plug 1991 jeep wrangler 4 cylinder?
The spark plug gap for a 1991 Jeep Wrangler with a 4-cylinder engine is typically 0.035 inches (0.89 mm). However, always consult your owner's manual for the most accurate and up-to-date specification. The manual will provide the precise gap recommended by Jeep for your specific vehicle and engine.