Electronic Feedback Carburetor: Description: Notes
The Electronic Feedback Carburetor (EFC) is used with the Electronic Combustion Computer on all California vehicles, and on Federal vehicles with 318" 4-barrel engines. The EFC system includes a special carburetor with computer controlled mixture and idle circuits, an exhaust oxygen sensor, a control computer and other related components. Engine sensors include distributor pick-up coil, coolant switch, vacuum transducer, carburetor switch, speed sensor, detonation sensor (V8 only), and intake manifold charge temperature switch (not used on 4 cylinder engines).