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Engine control unit > < Removing and installing fuel filter

Leon Mk1

checking the seal
checking the seal
  WARNING
Fuel system is under pressure! Wear safety goggles and appropriate clothing to avoid injury and contact with skin. Before loosening hose connections, wrap a cloth around the connection. Then eliminate the pressure by carefully separating the pipe.
Test requirements
l  Fuel pressure must be correct, check → Chapter
   
–  Pull off connectors -arrows- from all the injectors.
–  Unclip the cable harness from the injectors.
–  Remove the fuel rail from the intake manifold.
–  Remove the fuel rail together with the injectors from the intake manifold. (The fuel pipes remain connected).
–  Removing the rear seat.
–  Remove cover from fuel delivery unit.
  N15-10082
–  Using the auxiliary cables of the auxiliary measuring set -V.A.G 1594C-, connect the V.A.G 1348 remote control -V.A.G 1348/3A- to contact -5- of the fuel pump and to the (+) positive terminal of the battery
–  Join contact -5- of the connector and contact -1- of the fuel pump using the auxiliary cables of the auxiliary measuring set -V.A.G 1594C-.
  Note
The following operation is to make the fuel pump run when the engine is stopped.
–  Checking injectors for leakage (visual check). Only 1 to 2 drops per minute may emit from each valve when fuel pump is running.
If the fuel loss is greater:
–  Replace the defective injector → Chapter.
  Note
Always renew seals.
  N20-10204

Engine control unit > < Removing and installing fuel filter