Fuel Shut-Off System: Description

On 1974-77 models, a fuel shut-off solenoid is used on all models except 260Z, 280Z and 1977 810. System prevents dieseling (run on) after ignition is turned off. System consists of an electrically actuated solenoid which stops fuel flow to idle circuit.

On 1978 models, system consists of anti-dieseling solenoid, Neutral detecting switch, throttle valve switch, engine RPM switch, clutch pedal switch, and a vacuum switch. The fuel shut-off system is used to reduce fuel consumption during deceleration, and to prevent catalytic converter from overheating.

On 1979 210 models, system is electrically actuated and consists of an anti-dieseling solenoid valve, Neutral detecting switch, throttle valve switch, and an engine RPM switch. On 1979 Pickups, system is vacuum actuated and consists of an anti-dieseling solenoid valve, a Neutral detecting switch (Man. Trans.), a clutch pedal switch, inhibitor switch (Auto. Trans.) and a vacuum switch.