EVAP 2-Way Valve Test
- Remove fuel filler cap. Remove fuel tank vapor hoses from EVAP 2-way valve. For location of EVAP 2-way valve, see VACUUM DIAGRAMS article. Connect hose to available EVAP 2 way valve port from "T" fitting connected to a vacuum pump/gauge. See Fig 4
-Fig 3
.
- 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.
- Move vacuum/pressure gauge from vacuum side to pressure side. See Fig 1
to Fig 4
. 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.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.