Air Control Valve

1. With engine idling, disconnect electrical connector at air control valve and ensure engine speed drops.
2. Reconnect electrical connector and ensure engine resumes original speed. Disconnecting connector causes a large change in RPM when engine is cold, but, when engine is warm, there is a smaller or almost no change.
3. If there is no change in engine speed, proceed as follows:
a. Stop engine and disconnect electrical connector at air control valve.
b. Measure resistance between connector terminals on side of air control valve.
c. If resistance is not 8.6-10.6 ohms, replace air control valve.
4. If resistance is as described, proceed as follows:
a. Disconnect hose to air control valve.
b. Disconnect electrical connector at air control valve.
c. Apply 12 volts to connector on side of air control valve.
d. Look through hose connection to determine if internal valve operates.
e. If valve does not operate, replace air control valve.