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EVAP 2-Way Valve

WARNING: This page is about a different car, the 2001 Acura MDX, 2001 Acura Integra, 2001 Acura 3.5RL, 2001 Acura 3.2TL, and 2001 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove fuel filler cap. Remove fuel tank vapor hose from EVAP 2-way valve. On Integra, EVAP 2-way valve is located on fuel tank. On MDX, 3.2CL, 3.2TL & 3.5RL, EVAP 2-way valve is located in front of fuel tank. Connect hose end to a "T" fitting connected to a vacuum pump/gauge. See Fig 1 .
  2. Slowly apply vacuum while observing vacuum/pressure gauge. Vacuum should stabilize (valve opens) momentarily at 0.2-0.6 in. Hg. 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/pressure gauge from vacuum side to pressure side. See Fig 1 . Slowly pressurize vapor line while observing gauge. Pressure should momentarily stabilize (valve opens) at greater than 0.3 in. Hg. If pressure stabilizes as specified, valve is okay. If pressure stabilizes at less than 0.3 in. Hg, replace EVAP 2-way valve and retest.
Fig 1: Testing EVAP 2-Way Valve (Integra Shown; Other Models Are Similar)
G96D10069Courtesy of AMERICAN HONDA MOTOR CO., INC.
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