Fuel Pressure Release
WARNING: This page is about a different car, the 1994 Ford Pickup, 1994 Ford F-Super Duty, and 1994 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect negative battery cable. Remove fuel cap to release fuel tank pressure. Using EFI Pressure Gauge (T80L-9974-B), release fuel pressure from relief valve. Relief valve is located on fuel supply manifold.