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Fast Idle Valve: Testing

WARNING: This page is about a different car, the 1992 Acura NSX and 1991 Acura NSX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Remove the cover of the fast idle valve. See Fig 1 .
  3. Put your finger on the valve seat area and make sure that there is air flow with the engine coolant temperature below 86°F (30°C) and idling. If there is no air flow, replace the fast idle valve and retest.
  4. Warm up the engine until the cooling fan comes on.
  5. Check that the valve is completely closed. If not, air suction can be felt in the valve seat area. If any suction is felt, the valve is leaking. Replace the fast idle valve and recheck. See Fig 2 .
Fig 1: Removing Fast Idle Valve Cover
G00125718Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Replacing Fast Idle Valve
G00125719Courtesy of AMERICAN HONDA MOTOR CO., INC.
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