Electronic Engine Control System (EEC III)

This system is used on California light duty emission models with 5.0L (302") and 5.8L (351") W engines. Sensors monitor crankshaft position, EGR valve position, throttle position, manifold and barometric pressure, engine coolant temperature and exhaust gas oxygen. Information is sent to the Electronic Control Assembly (ECA) where it is analyzed. ECA then computes correct operating modes and signals other modules to adjust timing, air/fuel ratio, EGR flow rate, thermactor air flow, canister vapor flow and idle speed.