Feedback Carburetor System: Description

The Electronic Fuel Control (EFC) system maintains the proper air/fuel ratio during engine operation to maximize fuel economy and minimize emissions. EFC system consists of 10 sensors, the Electronic Control Assembly (ECA) and a Feedback Carburetor Actuator (FBCA). See Figure . The actuator is controlled by the ECA based upon various sensor input signals, primarily exhaust gas oxygen content. The ECA is also capable of detecting malfunctions within the EFC system and storing and outputting fault codes for diagnostic purposes.