See illustration It is the last part installed and retains the guts of the regulator in place
SOURCE: Can't find Fuel pressure regulator on 2000 Jimm
you need to remove the upper intake manifold to get to the FPR
SOURCE: cant find the fuel pressure regulator on a 2000 mecury mystique
This vehicle is most likely a returnless system,only one fuel line to the fuel rail. If it is returnless the fuel pressure regulator is part of the fuel pump module in the tank.
SOURCE: Where is the fuel pressure regulator on a 2003 oldsmobile alero?
There are 2 fuel lines connecting to the fuel injector rail. The larger line is the pressure line and the smaller line is the return line. The smaller line attaches to the fuel pressure regulator. You will notice that the regulator also has a vacuum line attached to it. If you are planning on changing it your self, let me know. There is a specific way to change it for safety reasons.
Let me know.
Regards,
SOURCE: 2000 Chevy Venture Fuel Pressure Regulator
use the pressure test port on the top of the engine, it is on the fuel rail that supplies fuel to the injectors, looks like a tire valve, will have a plastic cap on it.
SOURCE: fuel pressure regulator had no vacuum line connected
another engineers wet dream. think of it this way . what is normally in the intake when the engine is running.. answer vacume, hence the regulator gets its vacume without a hose connected to it as its already in a full time vacume chamber.no hose required . ps be carefull to seat the regulator and o rings securely into the housing befor you reattach the secureing metal clip.
good luck chris
I'm assuming you're talking about the "pressure" regulator. It's right on the fuel rail (see pictures) and is just held on by a snap ring. Don't forget to release the fuel pressure before you remove it. Hope this helps.....
WARNING: Fuel
in the fuel system remains under high pressure even when the engine is not
running. WARNING:
Before working on or disconnecting any of the fuel lines or fuel system
components, the fuel system pressure must be relieved. CAUTION:
Check for fuel leakage after installation is complete. 
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury. WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury. CAUTION: Use O-ring seals that are made of special fuel resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse O-ring seals. WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury. WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury. CAUTION: Use O-ring seals that are made of special fuel resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse the O-ring seals. 
Fig. Fuel pressure regulator
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