1990 Mitsubishi Mighty Max Service and Repair Manual

This factory service and repair manual for the 1990 Mitsubishi Mighty Max pairs a 2.4L inline-four with a 3.0L V6 of 181 cubic inches, both single-overhead-cam gasoline engines without turbocharging. Two trims, Base and 1 Ton, come as a 2-door extended cab pickup or a 2-door standard cab pickup. The manual documents the engine, fuel, cooling, transmission, drivetrain, brake and steering systems with procedures, specifications and wiring diagrams, and gives torque values for the suspension.

Engines covered

• 2.4L inline-four — SOHC, naturally aspirated, gasoline
• 3.0L V6 (181 cu in) — SOHC, naturally aspirated, gasoline

Body styles covered

• 2-door extended cab pickup
• 2-door standard cab pickup

Trims covered

• Base
• 1 Ton

Known issues on the 1990 Mighty Max. A single recall is listed: certain 1990 Mighty Max trucks with Takata front belts could have red buckle release buttons that break apart, sending pieces into the buckle so it no longer works as intended and the belt may fail to restrain someone in a crash. Owners were directed to inspect both front buckles. Of 7 owner complaints, seat belts account for 4, the engine and engine cooling 2, and the electrical system and gasoline fuel system 1 apiece. Cooling system procedures, fuel system specifications, seat belt torque values and electrical diagnostics are included.