Outer Vent Control Valve

When testing the outer vent control valve on Pickup, note that the valve is moved by manifold vacuum and held by the solenoid. The solenoid itself cannot move the valve.

1. Disconnect the outer vent hose from the carburetor. Blow air into the outer vent pipe and check that the outer vent control valve is open. Start the engine. With the engine idling, blow air into the outer vent pipe and check that outer vent control valve is closed.
2. Unplug the wiring connector from the solenoid. Using an ohmmeter, check the valve's resistance between the positive terminal and the solenoid body. Resistance should be 63-73 ohms at 68°F (20°C).