Three-Way Solenoid Valve

1. Start engine and allow to idle.

2. Disconnect wire at three way solenoid valve.

3. The engine speed should increase to 1000 RPM on except California models, and 1100 RPM for California models. If speed does not increase, the three way solenoid valve or the servo diaphragm is not operating properly.

4. To adjust servo diaphragm:

a. Inspect throttle positioner vacuum hoses for cracks or hardening. Replace as required.

b. Start engine and set idle speed to specifications.

c. Turn engine off and disconnect vacuum hose from distributor and plug hose.

d. Disconnect vacuum line at vacuum amplifier and vacuum hose at three way solenoid valve. Connect vacuum hose from servo diaphragm to vacuum amplifier so intake manifold vacuum is applied directly to servo diaphragm.

e. Connect a tachometer to engine and start engine. Engine speed should increase to 1000 ±100 RPM on all except California, and 1100 ±100 on California models. If not, adjust engine speed by turning adjusting screw on servo diaphragm throttle lever until proper engine speed is obtained.

f. Reconnect all vacuum hoses to their original positions.