Fuel pressure sensor

FUEL PRESSURE SENSOR

This is fitted at the centre of the “rail” fuel distributor manifold and its task is to supply the injection control unit a feedback signal to:

• adjust the injection pressure
• adjust the injection time.

DELIVERY MANIFOLD

The delivery manifold is fitted on the intake side of the cylinder head. With its volume of approx. 33 c.c. It dampens fuel pressure oscillations due to:

• operation of the pressure pump,
• opening of the injectors.

The fuel pressure sensor is fitted at the centre of the delivery manifold. The high-pressure hydraulic connections (between manifold - pump and manifold - injectors) are made through steel pipes with an inside diameter of 2 mm and an outside diameter of 6 mm.

REMOVAL/REFITTING

• Make sure that the ignition key is in the «STOP» position, then disconnect the battery (-) terminal. - Remove the pipes from the fuel manifold to the injectors (see specific procedure).

1. Disconnect the electrical connection from the fuel temperature sensor.

2. Slacken the manifold side coupling of the pipe from pressure pump to fuel manifold using tool no. 1.870.671.000.
3. Slacken the pressure pump side coupling of the delivery pipe from the pressure pump to the manifold using a suitable wrench.
4. Remove the fuel delivery pipe from the pressure pump to the single fuel manifold pipe.
5. Slacken the nuts and remove the fuel delivery manifold.

26 ÷ 32 Nm
2.7 ÷ 3.3 kgm