Vapor Tube Fittings
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Ford RV Cutaway, 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
The evaporative emission system contains fuel vapor and condensed fuel vapor. Although not present in large quantities, it still presents the danger of explosion or fire.
Disconnect battery ground cable. Disconnect vapor tube from the fitting. Squeeze fitting. Disconnect vapor tube from fitting. Inspect fitting and tube for damage. Remove any dirt or obstructions. Push tube into fitting until it snaps in place. Pull on the connection to make sure the fitting is secure.