The correctness of the regulator is determined on a running engine by the fuel pressure in the injector rail (see "Pressure in the Renault Logan gasoline system")
If the pressure is below normal, and the rest of the system is working, the regulator is faulty
It needs to be replaced as it is beyond repair.
The fuel pressure regulator is installed in the fuel pump module.
Remove the fuel pump module (see Renault Logan fuel pump replacement).
Disconnect the fuel level sensor harness connector.
Squeeze the tabs and remove the fuel pump assembly from the reservoir cup.
Remove the rubber o-ring
Remove thrust washer
Remove the spring
Press the latch and remove the fuel pressure regulator fitting from the seat in the module cover.
Press the latch and disconnect the ground wire
Remove the fuel pressure regulator.
Install parts in reverse order of removal