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Evaporative Emission System Leak Test Procedure

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: The evaporative emission system must not be pressurized to more than 3.48 kPa (14 inches H2O) or damage to the evaporative emission system may 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 H2O).
  4. Monitor the system for two minutes. The system fails the Leak Test if the pressure falls below 2.0 kPa (8 inches H2O).
  5. Repair any leaks as required.
  6. Repeat the Leak Test until the system remains above 2.0 kPa (8 inches H2O) after the two-minute test period.
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