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Home >> Acura >> 2004 >> MDX Base >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> EVAP System >> Fuel Tank Vapor Control Valve Test >> 2003-2004 models >> Float Test
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Float Test

  1. Make sure the fuel tank is less than half full.
  2. Remove the fuel fill cap to relieve fuel tank pressure, then reinstall the cap.
  3. Disconnect the fuel tank vapor recirculation tube (A), and connect a vacuum pump to the vapor recirculation hose.
    Fig 1: Disconnecting Fuel Tank Vapor Recirculation Tube, And Connect Vacuum Pump To Vapor Recirculation Hose
    G03640118Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Plug the pipe (B).
  5. Apply vacuum to the fuel tank vapor recirculation tube.
    • If the vacuum holds, replace the fuel tank (see page 11-324).
    • If the vacuum does not hold, the float is OK. Do the valve test.
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