Push Connect Coupling

WARNING: This page is about a different car, the 2002 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect safety clip from male hose. See Fig 1. Install Fuel Line Disconnect (T90T-9550-S) and push it into fitting. Separate fittings.
Before installation, lubricate tube end with clean engine oil. Align tube to fitting and push until a click is heard. Pull on fitting to ensure engagement. Install safety clip.

Fig 1: Disconnecting Fuel Lines With Push Connect Coupling

Courtesy of FORD MOTOR CO.