System Operational Test

Purge Control System Inspection:

1. Disconnect the red striped vacuum hose from the throttle body, connect a hand vacuum pump to the hose and plug the nipple.
2. While the engine is cold (coolant temperature less than 60 degrees C or 140 degrees F) allow the engine to idle and apply 50 kPa or 14 in. Hg of vacuum and verify that vacuum holds.
3. Increase engine speed to 3,000 rpm, apply 50 kPa Hg or 14 in. Hg of vacuum and verify that vacuum holds.
4. Allow the engine to warm up (engine coolant temperature greater than 70 degrees C or 158 degrees F).
5. With the engine operating at idle apply 50 kPa Hg or 14 in. Hg of vacuum and verify that vacuum holds.
6. Within three minutes of engine start increase engine speed to 3,000 rpm. Attempt to apply vacuum and verify that vacuum leaks.
7. After more than three minutes have elapsed since engine start increase engine speed to 3,000 rpm, apply 50 kPa Hg or 14 in. Hg and verify that vacuum is held momentarily then leaks. (Note! Vacuum will leak continuously if the test is being performed at elevations greater than 2,200 m (7,200 ft.) or intake air temperature is greater than 50 degrees C or 122 degrees F.