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Check fuel pressure regulating valveN276 > < Removing and installing fuel pressure senderG247

Octavia Mk2

Check the low pressure fuel system
Check the low pressure fuel system
Special tools and workshop equipment required
t  Pressure gauge, e.g. -V.A.G 1318-
Test conditions
l  Battery voltage at least 12.5 V.
l  Fuel filter o.k.
l  Fuel tank at least 1/2 full.
Test holding pressure
Observe the rules for cleanliness and the instructions when undertaking all work on the fuel system → Chapter.
–  Remove engine cover → Chapter.
   
–  Remove the fuel feed line -arrow- from the high pressure pump, to do so slacken the hose clamp.
  A23-10321
–  Connect the pressure gauge -V.A.G 1318- with the suitable adapter -2- to the fuel feed line -1-.
–  Connect the second hose -3- from the pressure gauge -V.A.G 1318- to the open connection of the high pressure pump, as shown in the following figure.
  Note
  A23-10324
The pressure gauge -V.A.G 1318- is connected to the fuel feed line.
–  Connect vehicle diagnosis, measurement and information system -VAS-.
–  Switch on ignition.
–  Select the „Engine electronics“ in the self-diagnosis.
–  Then select „Initiate basic setting“.
–  Select „Test fuel pump“ in the selection list.
–  Leave the fuel pump running until the highest fuel pressure has built up.
l  Specified value: min. 0.35 MPa (3.5 bar)
If the specified value is not reached, this may be due to the following causes:
t  The fuel filter is clogged.
t  The battery voltage is low.
–  Check the fuel flow rate of the fuel pump → Chapter.
  Note
Check fuel system for cable damage and leaks.
  A23-10323

Check fuel pressure regulating valveN276 > < Removing and installing fuel pressure senderG247