Fuel Shut-Off System: Operation: Notes

During deceleration, when intake manifold vacuum exceeds a pre-determined level, the fuel shut-off vacuum switch sends a signal to the anti-dieseling solenoid valve, shutting off the flow of fuel. Whenever manifold vacuum is below this pre-determined level, the system is inoperative. The system is also controlled by the clutch switch and gear position switches (neutral and inhibitor switch) so that system can be deactivated under certain conditions, even though vacuum is above the pre-determined level. The speed detecting switch with amplifier is installed on 210 and 310 models to control the fuel shut-off system during pre-determined vehicle speeds.