Auxiliary Air Valve
- Disconnect hoses from auxiliary air valve. Shine a light through valve. At room temperature, valve should be slightly open. Turn ignition "ON" (disconnect wires from air flow sensor, if equipped) and see that opening is closed in less than 5 minutes. Tap valve slightly to assist in closing.
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- If valve does not operate properly, check for power at connector with engine running. Connect a test lamp across connector terminals. If lamp does not light, check fuse and wiring. If lamp lights, check resistance of auxiliary air valve. If no resistance is measured, valve is bad. If resistance is measured, clean terminals and make sure connection is good.