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Home >> Acura >> 1997 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - GS-R >> Emission Systems & Sub-Systems >> Evaporative Emission System >> EVAP 2-Way Valve
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EVAP 2-Way Valve

  1. Remove fuel filler cap. Remove fuel tank vapor hose from EVAP 2-way valve. EVAP 2-way valve is located on fuel tank. Connect hose end to a "T" fitting connected to a vacuum/pressure gauge and vacuum pump. See Fig 1 .
  2. Slowly apply vacuum while observing vacuum/pressure gauge. Vacuum should stabilize (valve opens) momentarily within specified range. See EVAP 2-WAY VALVE STABILIZING PRESSURE  . If vacuum stabilizes within specified range, go to next step. If vacuum stabilizes less than or more than specified range, replace EVAP 2-way valve and retest.
  3. Move vacuum pump and vacuum gauge from vacuum side to pressure side. See Fig 1 . Slowly pressurize vapor line while observing gauge. Pressure should momentarily stabilize (valve opens) within specified range. See EVAP 2-WAY VALVE STABILIZING PRESSURE  . If pressure stabilizes as specified, valve is okay. If pressure does not stabilize as specified, replace EVAP 2-way valve and retest.
    EVAP 2-WAY VALVE STABILIZING PRESSURE

    Application in. Hg (kPa)
    Vacuum 0.2-0.6 (0.7-2.0)
    Pressure 0.4-1.4 (1.3-4.7)
    Fig 1: Testing EVAP 2-Way Valve
    G96D10069Courtesy of AMERICAN HONDA MOTOR CO., INC.
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