Feedback Control Solenoid: Description and Operation

Feedback Solenoid Valve (FBSV) Control System:

FBSV And SCSV Locations:

Feedback Solenoid Valve (FBSV) is installed in the carburetor float chamber cover. The ECU controls the main fuel metering circuit air-fuel ratio by controlling the duty cycle of the FBSV. The higher the duty cycle on time ratio, the leaner becomes the air-fuel ratio.