Where is Schrader valve on fuel rail Ford Freestar 2004?

The 2004 Ford Freestar doesn't have a Schrader valve on the fuel rail in the same way a tire does. The fuel system is under pressure, but it's accessed differently. There's no readily visible valve to check fuel pressure directly. To test fuel pressure, a specialized fuel pressure gauge needs to be connected to a test port, usually located on the fuel rail itself, but it requires a fitting and not just a simple Schrader valve. The exact location of the test port varies slightly depending on the engine configuration, but it's usually on the side of the fuel rail. You'll need a repair manual or consult a mechanic to find the precise location.