EVAP Two Way Valve Test
|1.||Remove the fuel cap.|
|2.||Disconnect the vapor line from the EVAP two way valve (A). Connect it to a T-fitting (B) from the vacuum gauge (C) and the vacuum pump (D) as shown.|
|3.||Apply vacuum slowly and continuously while watching the gauge.|
The vacuum should stabilize momentarily at 0.8-2.1 kPa (6-16 mmHg, 0.2-0.6 in.Hg).
If the vacuum stabilizes (valve opens) below 0.8 kPa (6 in.Hg), or above 2.1 kPa (16 mmHg, 0.6 in.Hg), 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.|
|5.||Slowly pressurize the vapor line while watching the gauge. The pressure should stabilize momentarily above 1.0 kPa (8 mmHg, 0.3 in.Hg).|