Anti-AFTERBURN Valve
- Warm up engine and run it at idling speed. Disconnect air hose (air control valve-to-air pump) at air pump. Place a finger over air hose opening and make sure that air is not sucked into air hose at idling speed.
- Increase engine speed more than 3000 RPM then decrease engine speed rapidly. Make sure that air is sucked into air hose for a few seconds while decelerating. Replace air control valve, if necessary.