Bronco II 4WD V6-171 2.8L (1985)
Carburetor Solenoid: Description and Operation
2150A Carburetor Feedback System
Fig. 4 2150A feedback fuel control
This carburetor feedback fuel control, utilizes a pulsing solenoid to introduce fresh air from the air cleaner into the idle and main system vacuum
passages to lean the fuel and air mixture from the maximum rich condition (0% duty cycle-solenoid closed) to the maximum lean condition (100% duty
cycle-solenoid fully open). The solenoid operates under the control of the EEC-IV system. This carburetor also incorporates a throttle position sensor,
Fig. 4.