Jet Mixture Solenoid
The jet mixture solenoid supplies fuel to the jet mixture portion of the carburetor. The ECU controls this solenoid in response to signals from oxygen sensor.
When oxygen sensor detects a lean condition, ECU increases the jet mixture solenoid duty cycles to enrich the mixture. When the oxygen sensor detects a rich mixture, ECU decreases the jet mixture solenoid duty cycles to lean out the mixture.