Escort L4-116 1.9L VIN 9 2-bbl (1986)
Feedback Control Solenoid: Description and Operation
Feedback Solenoid
Carburetor Feedback Motor - 7200
The Actuator is part of the Carburetor Feedback Control System, used on 7200 model carburetors. The actuator is threaded into the carburetor body, and
its actuator shaft moves a fuel metering pintle valve to produce a richer or leaner air/fuel mixture at the carburetor. In response to an electronic signal
coming from the Exhaust Gas Oxygen (EGO) sensor and conditioned by the EEC (or MCU) System, the actuator shaft moves in and out.
Carburetor Feedback Solenoid - YFA
This solenoid assembly is an integral part of the YFA feedback carburetors
In a feedback system, it operates as a pulse width modulated (dithering) solenoid, varying the air bled into the idle and main fuel metering circuits, in
response to commands from the MCU or EEC, thereby varying the fuel/air ratio delivered to the engine.
Carburetor Feedback Solenoid - 2150A
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. Also new to the 2150 carburetor is a throttle position sensor required by the
EEC system. This new sensor was designed for the 2150 carburetor and was made non-adjustable to reduce production and warranty costs. To package
the throttle position sensor and the feedback system changes were made to the booster assembly, main body, airhorn, throttle shaft and to certain choke
linkage parts (fast idle cam, cam hub, cam rod, fast idle level & choke shield).
