Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.