Fuel pressure regulator location please?

The diagnostic computer reads fuel too lean. The fuel pressure is 70. It should between 28 and 40. Where can I find a diagram that shows me where the fuel pressure regulator is, or can you tell me?

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Car overheated wont start now turns over sounds funny but smells like gas bad fuel pump working

2004 Explorer XLT 4.0L 6-cyl gasoline; gas mileage way down to about 12-13 mpg, running very rich, had diagnosis performed, was told the "fuel pressure regulator" located at the front of the fuel rail is stuck open or not functioning. Told about $350 for part, but cannot locate equivalent part on any auto parts sites. Is the name correct, or is the device known as something else?

Trouble code read "high fuel pressure", "running rich bank 1 and 2", don't remember the code. Took the vehicle to mechanic who diagnosed fuel system condition, checked fuel pump pressure (5 psi too low), checked rail pressure (10 psi too high), took vacuum line off the "fuel pressure regulator" at front of rail, pressure is meant to drop by about 10 psi, did not change without vacuum, which lead to diagnosis of faulty fuel pressure regulator. He also recommended replacing fuel pump and fuel filter. Total cost of $900 with labor. No tune-up ever, all original engine equipment including fuel and ignition systems components. I did replace the MAF sensor recently when vehicle began rough-idling and stalling.
My question is what is the component called that bolts on (two torx bolts) to front of the fuel rail, and has a small-diameter vacuum line coming of the top of it? I can't find it in any of the online parts stores, but do remember the mechanic telling me that it is a motorcraft part only. Thanks for your help.

Thanks, I found it, it is the Fuel Injection Pressure Damper, Ford PN 9F775. Rock Auto has it for $166, Ford for $380.

Hello, where is the Fuel Pressure Regulator on my model explorer? It has the 4.0 L V6 OHV engine. I was told it was on the fuel pump assembly but I have been told other things. Could someone tell me for sure?

The regulator actually is not working properly. It starts but it is a little rough on cold starts. The cranking amps of the battery is great.

When the engine is off there is no pressure.

Ok the truck ran fine and then a hour later would not start. Replaced the fuel pump, still dont think im getting proper fuel pressure. Checked the fuel injecter wire harness for power didnt use a noid light. Used a volt meter and when turning the vehicle over showed 12 volts. So sure thats ok. But I am getting some fuel pressure out of the port. But not the 30 to 45 psi. So my question is the injectors haft to have a least 30 psi to operate, or fuel to pass through the injectors. Also where is the fuel pressure regulator located at on this vehicle?And the truck only turns over. Can spray starting fluid in intake and it will fire.