No. 2 Anti-AFTERBURN Valve
- Warm engine and run at idling speed. Disconnect the air hose running from air cleaner to number 2 anti-afterburn valve and make sure that air is not sucked into the air hose at idling speed.
- Increase the engine speed more than 3000 RPM and then decrease the speed rapidly. Make sure the air is sucked into the air hose for a few seconds while decelerating. Replace air control valve if it does not operate properly.