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Two-Way Valve

  1. Remove gas cap and disconnect fuel vapor hose from liquid/vapor separator. Attach vacuum pump with gauge reading from 0-5 in. Hg. Slowly draw vacuum while observing gauge.
  2. Vacuum should stabilize at 0.2 - 0.6 in. Hg as 2-way valve opens. Reverse pump and gauge connections and slowly pressurize vapor hose. Pressure should momentarily stabilize at 1.4-2.8 in. Hg as 2-way valve opens. If not, check hose connections or replace valve.
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