Fuel pressure regulators are normally located in the fuel manifold. They are either vacuum controlled or electronic controlled to maintain the right fuel pressure for engine requirements and to shut off the fuel pump when the ignition is turned off
If your manually adjusted unit will not do all that then you are asking for fault codes to appear and all sorts of problems to occur
SOURCE: ford focus fuel pressure
you are interferring with something you know nothing about,dont you have an annual vehicle inspection to check that vehicle conforms to whats on the paperwork,or are using this just for track .as a vehicle with this sort of modification with no cat on either is illegal to use on the road.the brakes cant cope with extra power the suspension ,the chassis in fact everything is not designed for this if you want a faster car buy a nice jag or a porsche evan consider ferrari or lamborgini
SOURCE: Where is the fuel pressure regulator located on an 2002 f150 v6?
in the center of the motor,in the rear on the fuel rail
SOURCE: fuel pressure regulator location
the fuel pressure regulator is on the fuel injector rail. it is where the fuel line for input connects to
SOURCE: fuel pressure regulator
Two places to look...if you have separate injectors for each cylinder then regulator should be at the front end of the fuel rail. If you have throttle body injection it is on the throttle body itself.
SOURCE: how to change a 2005 nissan sentra fuel pressure regulator
If you want to replace the fuel pump regulator you are better off getting the whole fuel pump module I know its expensive.The problem is you went on line and there is a bunch of chatter about the fuel pump causing delayed starts. They are right. There is a TSB Nissan put out this includes the fuel pump and there is no mention of the regulator that I know of.
Fuel Pressure Regulator is located on the fuel rail.
1. Disconnect the negative battery cable.
2. Properly relieve the fuel system pressure.
3. Remove the air cleaner outlet tube(s).
4. Remove any necessary components to access the pressure regulator.
5. Disconnect the vacuum hose from the pressure regulator.
6. Remove the pressure regulator attaching screws.
7. Remove the pressure regulator from the fuel rail.
To Install
8. Discard the O-rings on the pressure regulator and replace them with new ones.
9. Lubricate the O-rings with clean engine oil.
10. Install the regulator into the fuel rail and tighten the retaining screws.
11. Connect the vacuum hose to the regulator.
12. Install any components removed to access the regulator.
13. Install the air cleaner outlet tube(s).
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