Fuel Delivery and Air Induction: Testing and Inspection

Heated Air Induction System Test

1. Remove the air cleaner housing cover and air cleaner element.




2. Check the air valve (A). The door should be open when the temperature at the wax element (B) is below 32 °F (0 °C).
- If the valve is open, go to step 3
- If the valve is not open, check the shaft for binding or sticking. If it is OK, replace the air cleaner housing.

3. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.




4. Check the air valve (A). The air valve should be closed when the temperature at the wax element (B) is above 50 °F (10 °C).
- If the air valve is closed, the heated air induction system is OK.
- If the air valve is not closed, check the shaft for binding or sticking. If it is OK, replace the air cleaner housing.