How do you remove a fuel pressure regulator on a 1998 Mercury Mystique 2.5 L V6?

To remove the fuel pressure regulator on a 1998 Mercury Mystique 2.5L V6, first, relieve the fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls. Next, disconnect the negative battery cable and relieve any remaining pressure by carefully loosening the fuel line fittings. Remove the vacuum hose from the regulator, followed by the bolts securing the regulator to the fuel rail. Finally, pull the regulator off the rail, ensuring any O-rings come off with it, and replace it as needed.