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Skoda Workshop Service and Repair Manuals

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Inspecting the holding pressure of the fuel (checking the non-return valve of the fuel pump) > < Inspecting the operating and holding pressure of the fuel

Fabia Mk1

Checking fuel operating pressure
Checking fuel operating pressure
  WARNING
The fuel feed line is pressurized! Place a clean cleaning cloth around the connection point before detaching wiring. Reduce pressure by carefully removing the wiring.
  Note
The operating pressure in the fuel system is controlled by the fuel pressure regulator, which is a component of the fuel filter or mounted separately. The fuel pressure regulator regulates the fuel pressure to approx 0,3 MPa (3 bar).
   
–  Pull out the fuel feed line -2- and catch the fuel which flows out with a cleaning cloth.
  S10-0389
–  Connect the pressure gauge -V.A.G 1318- with adapter -V.A.G 1318/11 - and -V.A.G 1318/17 - to the fuel feed line, the shut-off valve on the measuring device must be in position -A-.
–  Start engine.
Specified value of the pressure: 0.29 ... 0.32 MPa (2.9 ... 3.2 bar).
If the specified value is higher than 0.32 MPa (3.2 bar):
–  Check fuel return-flow line between the fuel filter and the fuel pump for continuity or replace fuel pressure regulator (fuel filter).
If the specified value is lower than 0.29 bar (2.9 MPa):
–  Check the fuel lines, the fuel distributor as well as the injection valves for leaktightness.
  S20-0106

Inspecting the holding pressure of the fuel (checking the non-return valve of the fuel pump) > < Inspecting the operating and holding pressure of the fuel