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Accelerator control unit > < Test fuel flow

Leon Mk2

Check the fuel pump non-return valve
Check the fuel pump non-return valve
Test conditions
l  Remote control -V.A.G. 1348/3A-, connected.
l  Pressure measuring device -V.A.G. 1318-, connected.
Testing process
  Note!
This test also checks the watertightness of the fuel supply hose connections, from the supply unit to the point of connection for the pressure measuring device -V.A.G. 1318-.
   
–  Close the measuring device's flow valve (lever perpendicular to flow).
–  Operate the remote control in successive short bursts, until the pressure gauge shows a reading of 3 bar.
  Caution
Danger of splashing when the flow valve is openend; place a receptacle in front of the open connection on the pressure tester.
–  Drain any possible excessive pressure by carefully opening the flow valve.
–  Observe the pressure drop on the pressure gauge. After 10 minute, pressure must not fall below 2 bar.
If pressure continues to drop:
–  Check the watertightness of the connections.
If no fault is found in the cables:
–  Fuel pump faulted, renew the fuel supply unit → Chapter; Fuel supply unit: removing and installing.
  N20-0117

Accelerator control unit > < Test fuel flow