MCU Engine Control System: Description

The MCU control system is named for and commanded by a Microprocessor Control Unit. This micro-computer is located in the engine compartment and is capable of controlling engine air/fuel ratios, air injection, and on some models, canister purge, spark retard and idle speed.

The MCU system is used on all 4.9L, light duty F100 pickups as well as all 4.9L, light duty California models. The system consists of the MCU module, air/fuel control and air injection solenoids, engine sensors, and related circuitry.