1 BBL Carter YFA carburetor on 1980 300.

There is an electric solenoid valve mounted to the side of the carburetor using a footbal style two screw flange.

Appears that the valve opens and closes some type of bypass port(s) internal to the carburetor. There are three slotted holes on the side of the carb and three matching slotted holes on the solenoid device mounting flange.

Other YFA carburetors do not have this feature.

The FY carburetors have a cast ion throttle base ,while the YFA has a pot metal throttle base. So the carb is definetly a Cater YFA
The carb also has electric choke and heat tube to choke chamber.

Questions:
1. What is the function of the three slotted hole ports?
2. What signal controls the electric solenoid port valve?
3. Why have combined electric and hot air choke?

 

It's entirely likely a vehicle sold in the People's Republic of Kalifornia in 1980 would already have some early incarnation of the feedback carb. Controlled by an EEC. Assuming the rest of the vehicle is intact there should be a wiring harness and O2 sensor, temp sensor, MAP, etc. that ties it all through the firewall into the passenger area.

Later model Fords used an electric assist along with the cllimactic choke. The choke should work okay with exhaust and no electric assist but not so well with the electric and no exhaust heat. Voltage from the stator is ~7 volts, iirc, generally not enough to reliably open an aftermarket electric choke either. It could be used to open/close a relay, though.

 

Thank you for your response.

Yes, the doner truck, 1980 f150 300, was previously registered in Country of Kalifornia before retiring to the scap yard.


A Bing search for YFA images revealed only one image out of many that incorporated the side mounted solenoid valve controlled bypass ports.

Stator 7vdc?
Should the combination electric/hot air choke fully open with 12vdc, applied and no hot air?

Should the carb operate with no 12vdc to the solenoid valve.

 

It's the feedback sensor, relays information to the computer. ~Bill

 

After doing some research have identified the name of what was thought to be a solenoid valve this Carter 7427S YFA carburetor
Actually, it not a solenoid valve, but rather a stepper motor that called a "mixture control " or sometimes referred to as the "feedback control".
This device controls the air to fuel mixture using the electronic EEC with multiple feedback inputs from the oxygen sensor and temperature sensors, etc.
The carburetor also incorporates another electrical device called an idle control stepper or idel stop solenoid.

Believe this carburetor will work just fine without an EEC by blanking off the mixture control port with a steel plate and removing the electric idle stop solenoid.

 

 

The Carter feedback carb WILL NOT work successfully without the EFI system functioning. The moveable mixture control pintle will not move as directed by the computer. It is possible for the vehicle to run in this mode but it will basically be in "limp home" mode with power and fuel consumption suffering. If that is acceptable in your case then "yes" it can work successfuly.