Checking valve operation
Run the engine at idle and disconnect the power wire from the valve. The motor should stop and a slight click should be heard when the power wire is connected to the valve.
Removal and installation of the valve
Unscrew the valve from the carburetor socket, having previously disconnected the power wire from it.
When installing the valve, make sure that there are no marks on the sealing cone.
Fast idle adjustment
Disconnect the vacuum ignition timing hoses from the carburetor.
Acting on the throttle actuator, achieve the opening of the throttle valve of this chamber and slightly open the air damper by 3 mm (on «316») or 3.2 mm (on «318», «320»), use a drill to check the gap.
Start the engine The engine speed should be between 1900-2000 rpm.
In case of deviation from the norm, adjust the fast idling with the adjusting nuts 1.