Mixture Control Solenoid - Slow Cut: Description and Operation

Primary Slow Mixture Cut-off Solenoid Valve:

The primary slow mixture cut-off solenoid valves, located on the side of each carburetor, are provided to cut-off the idle mixture passage upstream of the bypass port to prevent the engine from running on after the ignition switch is turned off.

This solenoid valve also functions to stop the mixture flow from the slow fuel system during vehicle deceleration in order to save the fuel consumption. When the vehicle is decelerating, the control unit identifies the condition and deactivates the solenoid valve to close the mixture passage.

The control unit receives signals from the TW sensor, MAP sensor, vacuum switch, speed sensor, ignition coil, shift position console switch, and ignition switch.