Evaporative Emissions System Leak Test
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Connect Evaporative Emissions System Leak Tester (134-00056) to EVAP test port. Close canister vent solenoid. See CANISTER VENT SOLENOID CLOSING PROCEDURE . Pressurize EVAP system to 14 in. H2O (3.48 kPa). Monitor system pressure for 2 minutes. EVAP system pressure should not fall below 8 in. H2O (2 kPa). Repair leaks as necessary. Repeat EVAP system leak test until system pressure remains greater than 8 in. H2O (2 kPa) after 2 minutes.