skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

ABOUT US
Check the fuel system for tightness > < Removing and installing the high pressure pump

Octavia Mk2

Filling/bleeding the high pressure pump and the fuel system
Filling/bleeding the high pressure pump and the fuel system
Special tools and workshop equipment required
t  Cleaning and degreasing agent, e.g. -D 009 401 04-
t  Protective goggles and gloves
  Caution
Risk of damage to the high pressure pump through running dry.
After installing a new high pressure pump, the high pressure pump must be filled up with fuel before the first engine start. Avoid the high pressure pump to run dry.
  Note
t  When installing the high pressure pump, ensure that no dirt penetrates the fuel system.
t  Only remove the screw plug immediately before installing the fuel lines.
Conditions
l  On vehicles with automatic gearbox the selector lever must be in position „P“.
l  The vehicle must be filled up.
l  The temperature of the fuel system is ≥ 15 °C.
In order to fill up the high pressure pump with fuel, proceed as follows:
–  Connect vehicle diagnosis, measurement and information system -VAS 505x-.
–  Switch on ignition.
–  Select the „Engine electronics“ in the self-diagnosis.
–  Then select „006 - Initiate basic setting“.
–  Enter the display group „35“ via the ten-key pad and confirm with „Q“.
–  Then press on „activation“.
t  The fuel pumps start running for approx. 60 seconds.
–  Repeat this work procedure 3x.
   This ensures that the high pressure pump is adequately filled up with fuel.
  WARNING
Wear protective gloves and protective googles when working with grease remover!
   
–  Degrease the union nuts -1- and -3- of the high pressure line and their surrounding area at the high pressure pump and at the fuel high pressure reservoir.
–  Start the engine and let it run at an average speed for a few minutes.
–  Carry out a visual inspection of the fuel system for leaks after switching off the engine.
If there is leakage despite the correct tightening torque:
–  Replace the related component part and repeat the filling/bleeding procedure.
If no leaks are found:
–  Then carry out a test drive with minimum one full load acceleration up to max. speed.
–  Afterwards, once again carry out a visual inspection of the fuel system for leaks.
If there is leakage despite the correct tightening torque:
–  Replace the related component part and repeat the filling/bleeding procedure.
If no leaks are found:
–  Interrogate and if necessary erase fault memory of engine control unit → Vehicle diagnostic tester.
–  Check readiness code, if necessary re-generate → Vehicle diagnostic tester.
  A23-10449

Check the fuel system for tightness > < Removing and installing the high pressure pump