Anti-Afterburn Valve 2

1. Run engine until it reaches normal operating temperature.
2. Disconnect air hose between No. 2 anti-afterburn valve and air cleaner at air cleaner and ensure air is not drawn into hose.
3. Disconnect vacuum line from No. 2 anti-afterburn valve and ensure air is not drawn into air hose.
4. Connect vacuum line and ensure air is drawn into air hose for a few seconds.
5. If air is drawn for more than three seconds or not drawn at all replace valve.
6. Connect all hoses to proper locations.