where is my Fuel pressure regulator??

#2 is fuel pressure regulator... if you're looking to disconnect it, first release pressure via #3 in pic
 

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I'm guessing by your sig you have an 01? I havent really looked myself under my hood for one but it has been my understanding that the 99+ cars do not have one because we have a returnless fuel system. Pressure is regulated by pump flow. Regulators are used on return style systems which the 99-04 cars do not have.