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Home >> Acura >> 2004 >> RSX Base, Standard >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> EVAP System >> EVAP Two Way Valve Test >> 2002-2004 models

2002-2004 models

  1. Remove the fuel fill cap.
  2. Disconnect the vapor line from the EVAP two way valve (A). Connect the line to a T-fitting (B) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, as shown.
    Fig 1: Identifying EVAP Canister Purge Valve Line And Connections
    G03651263Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Apply vacuum slowly and continuously while watching the gauge. The vacuum should stabilize momentarily at 0.8-2.1 kPa (0.2-0.6 in.Hg, 6-16 mmHg).

    If the vacuum stabilizes (valve opens) below 0.8 kPa (0.2 in.Hg, 6 mmHg) or above 2.1 kPa (0.6 in.Hg, 16 mmHg), install a new valve and retest.

  4. Move the vacuum pump hose from the vacuum fitting to the pressure fitting, and move the vacuum gauge hose from the vacuum side to the pressure side (A) as shown.
    Fig 2: Removing Fuel Fill Cap
    G03651264Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Slowly pressurize the vapor line while watching the gauge. The pressure should stabilize momentarily above 1.0 kPa (0.3 in.Hg, 8 mmHg).
    • If the pressure momentarily stabilizes (valve opens) above 1.0 kPa (0.3 in.Hg, 8 mmHg), the valve is OK.
    • If the pressure stabilizes below 1.0 kPa (0.3 in.Hg, 8 mmHg), install a new valve and retest.
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