The fuel rail collects fuel and distributes it between the fuel lines of individual injectors
A sensor is installed in the rail, which monitors the pressure created in it by the high-pressure pump
The signal from this sensor is used by the ECM to regulate the supply of the high-pressure fuel pump.
In addition, there is a pressure reducing valve in the common fuel line.
It works as a safety valve, releasing excess pressure if the pressure in the fuel line exceeds the set level.
Fuel drained from the common high-pressure fuel line returns to the fuel tank through the drain fuel line.
When unscrewing and disconnecting the ramp, take into account the following:
- - all open fuel lines must be immediately plugged after removal to prevent dirt from getting in;
- - the fuel pressure sensor must be removed only if it is being replaced, if the sensor was removed, it must be replaced (the ramp is supplied with a pressure sensor installed);
- - before removing, mark the location of the fuel supply line to the injectors.
Internal The ramp channels can only be cleaned with contact cleaner No. 3824510 or its equivalent.
Clean the fittings before disconnecting the tubes.
The keys used to disconnect the tubes must be clean.
Disconnect the negative terminal from the battery
Removing the recirculation system pipe
Press the lock and disconnect the wiring block from the fuel pressure sensor in the ramp
Unscrew the nut securing the high-pressure pipe to the ramp
Unscrew the nut securing the high-pressure pipe to the injector
Remove the pipe and unscrew the pipes of the other three injectors
Unscrew the nut securing the high-pressure supply pipe to the rail and disconnect the pipe from the rail
Squeeze the retainer and disconnect the return pipe tip from the ramp
Unscrew the three bolts securing the ramp to the cylinder head
Remove the ramp.
After removing and washing the ramp, you need to check the condition of the fittings installed on the ramp for cracks or scratches.
Install the fuel rail on the engine.
Connect everything fuel lines.
Bleeding the system (article -Maintenance of the fuel system)
Insert and tighten the ramp mounting bolts (tightening torque 24 Nm).
Tighten all fuel lines (tightening torque 27 Nm).