Pickup 2WD L4-2559cc 2.6L SOHC (4ZE1) (1993)
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Evaporative Check Valve: Testing and Inspection
Check And Relief Valve
- Remove the valve.
- Apply less than 40 mmHg pressure to the tank side of the valve.
Air should not pass through valve.
- Apply 40 mmHg pressure to the tank side of the valve.
Air should pass through valve.
- Apply less than 20 mmHg vacuum to the tank side of the valve.
Air should not pass through valve.
- Apply 20 mmHg vacuum to the tank side of the valve.
Air should pass through valve.
- Replace the valve if it fails the above tests.
