Evaporative Emission System Leak Test

Fig 1: Identifying Special Tools

Courtesy of FORD MOTOR CO.

CAUTION: The evaporative emission system must not be pressurized to more than 3.48 kPa (14 inches H₂ O) or damage to the evaporative emission system can occur.

1. Connect the Evaporative Emission System Leak Tester to the evaporative emission test port.
2. Close the canister vent solenoid. For additional information, refer to CANISTER VENT SOLENOID CLOSING PROCEDURE .
3. Pressurize the evaporative emission system to 3.48 kPa (14 inches H₂ O).
4. Monitor the system for two minutes. The system fails the leak test if the pressure falls below 2.0 kPa (8 inches H₂ O).
5. Repair any leaks as necessary.
6. Repeat the leak test until the system remains above 2.0 kPa (8 inches H₂ O) after the two-minute test period.