Hello -
Thanks for the info.............
Okay my friend......it looks like it is in the fuel tank and part of the pump. See below.
Is this what your rail looks like


Fuel Pressure Regulator
Fuel pressure regulator is a mechanical device, used to maintain a constant pressure across fuel injector tip. Spring and rubber diaphragm will move from an open to closed position keeping fuel pressure constant. Excess fuel is returned to fuel tank.
Regulator may be located on fuel injector rail, outside fuel tank (between tank and rear of vehicle), or with in-tank fuel pump module. On regulators located in fuel pump module, regulator includes an internal fuel filter. Excess fuel is routed directly into fuel tank without using a return line. See Fig. 2 .
Fig. 2: Cross-Sectional View Of In-Tank Fuel Filter/Fuel Pressure Regulator (Typical)
Courtesy of CHRYSLER CORP.

In-Tank Fuel Pump
Fuel pump is a positive displacement, immersible pump with a permanent magnet electric motor. Fuel is drawn in through a separate filter/strainer at bottom of fuel pump and pushed through filter to fuel outlet line (to fuel injectors). Voltage to operate pump is supplied from fuel pump relay. On some models, fuel pump relay is activated by ASD relay.
On some models, a fuel pump module may include a combination fuel filter/fuel pressure regulator, fuel pump reservoir, a separate in-tank fuel filter, pressure relief/rollover valve, fuel gauge sending unit and fuel supply line. See Fig. 3 .
Fig. 3: Identifying Fuel Pump Module Components (Typical)
Courtesy of CHRYSLER CORP.

Aug 31, 2009 at 10:02 PM