Forced idling device (Escort 3)

The electromagnetic shut-off valve of this device is controlled by the ignition system controller based on signals from sensors about the crankshaft speed, vacuum in the intake tract and coolant temperature.

The vacuum sensor is installed on the air filter. The electromagnetic shut-off valve stops the fuel supply to the engine cylinders when the throttle pedal is released, if the engine temperature is above 35°C. and the crankshaft speed exceeds 1600 rpm. and restores it when the speed drops to 1400 rpm.

When the throttle pedal is pressed, the fuel supply is also resumed by the limit switch installed on the pedal. The thermal time relay prevents fuel overflow during start-up and operation of the forced idle device at an engine temperature below 35°C.

The text of the article was copied from the website: FordBook