Air Injection: Testing and Inspection
INSPECTION1. Visually inspect hoses and pipes for cracks, kinks, damage or loose connections.
2. Install vacuum gauge.
- Using a 3-way connector, connect a vacuum gauge to the hose between the reed valve and No. 2 water by-pass pipe.
3. Inspect pair system operation with cold engine.
- The engine coolant temperature should be below 35° C (95° F).
- Disconnect the No.2 air hose from the PAIR reed valve.
- Start the engine.
- Check that the vacuum gauge indicates vacuum at idle.
- Check that a bubbling noise is heard from the PAIR reed valve.
4. Inspect pair system operation with hot engine.
- Warm up the engine.
- Check that the vacuum gauge indicates zero vacuum at idle.
- With the engine idling, check that a bubbling noise is not heard from the PAIR reed valve.
- Race the engine about 2,500 rpm and quickly close the throttle valve.
- Check that the vacuum gauge indicates zero vacuum momentarily.
- Check that a bubbling noise stops momentarily.
- Reconnect the No. 2 air hose to the PAIR reed valve.
5. Remove the vacuum gauge, and reconnect the vacuum hose to the proper location.
If no problem is found with this inspection, system is normal; otherwise inspect each part