Description
The regulator maintains a constant pressure of the fuel supplied to the injectors. When the difference between the fuel pressure and the pressure in the manifold exceeds 290 kPa, the diaphragm is pressed upwards and the excess fuel is discharged back to the fuel tank through the return pipe.
Trial
Warning! Do not smoke while working on the fuel system. Do not create sparks or open flames in the workplace.
1. Screw the 12mm adapter onto the fuel filter and attach the special tool.
The pressure should be 260-310 kPa (2.7-3.2 kgf/cm2) (when the vacuum hose is disconnected from the fuel pressure regulator and it is pinched).
2. Reconnect the vacuum hose to the fuel pressure regulator.
3. Make sure the fuel pressure is rising by disconnecting the vacuum hose from the fuel pressure regulator again and pinching it.
If fuel pressure does not increase, replace the fuel pressure regulator.
Replacement
Warning! Do not smoke while working on the fuel system. Do not create sparks or open flames in the workplace.
1. Put a tissue paper under the fuel pressure regulator, then release the pressure (see above).
2. Disconnect the vacuum hose and fuel outlet hose.
3. Turn off two 6-mm fixing bolts and remove a regulator of pressure of fuel.
4. Apply clean engine oil to a new O-ring and carefully install it into position.
5. Install the fuel pressure regulator in the reverse order of removal.