To find the fuel pressure, you'd need to:
* Consult a professional mechanic or a Ford dealership service department: They have access to the proper specifications and diagnostic equipment.
* Use a fuel pressure gauge: This is the only reliable way to measure the actual fuel pressure of your specific vehicle. You'd need to connect the gauge to the fuel system (often at the Schrader valve on the fuel rail), then start the engine and observe the readings. Remember to follow all safety precautions when working with fuel systems.
* Refer to a very detailed repair manual specific to your year and model: Some extremely detailed manuals might give a range or some operating parameters, but it's unlikely to be a single, precise number.
In short, there's no single answer to "what's the fuel pressure?" You need to use a gauge or consult a professional. Trying to find it online without a specific year might give you incorrect information for your engine.