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Anti-AFTERBURN Valve

  1. Remove air cleaner assembly cover and start engine. With engine at idle, check for vacuum at valve inlet. Raise engine speed to 3500 RPM and close the throttle quickly. See Fig 1.
  2. Vacuum should be felt at valve inlet as throttle closes. If not, check and ensure that vacuum port is clear. Clean as necessary and repeat test. If vacuum is still not present when throttle is closed, replace anti-afterburn valve and retest.
Fig 1: Testing Anti-Afterburn Valve
G09309877Courtesy of AMERICAN HONDA MOTOR CO., INC.
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