Without Fuel Pressure Gauge
WARNING: This page is about a different car, the 1998 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
If fuel pressure gauge is not available, disconnect Inertia Fuel Shutoff (IFS) switch. For IFS location, see INERTIA FUEL SHUTOFF (IFS) SWITCH LOCATION table under ENGINE SENSORS & SWITCHES. Remove fuel cap to release fuel tank pressure. Crank engine for 15 seconds to release system pressure.