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Home >> Mitsubishi >> 2005 >> Lancer Evolution >> Repair and Diagnosis >> Engine Performance >> System >> Emission Control -- Evolution >> Evaporative Emission Control System >> Check Valve Check
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Check Valve Check

Connect a hand vacuum pump to the check valve, apply negative pressure and check the airtightness.

CONNECTED NIPPLE COLOR NORMAL CONDITION SPECIFICATION

CONNECTED NIPPLE COLOR NORMAL CONDITION
Black Negative pressure leaks
Brown Negative pressure is maintained
Fig 1: Applying Negative Pressure
G02485812Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.