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Removing and installing fuel delivery unit > < Checking fuel pump delivery rate - vehicles with 6-cylinder MPI engine

A4 Mk2

Checking fuel pump delivery rate - vehicles with 8-cylinder MPI engine
Checking fuel pump delivery rate - vehicles with 8-cylinder MPI engine
Special tools and workshop equipment required
   
t  Remote control -V.A.G 1348/3A- for V.A.G 1348 with adapter cable -V.A.G 1348/3-2-
t  Fuel-resistant measuring container
Test conditions
l  Battery voltage at least 12.5 V
l  Fuel filter OK
l  Fuel tank at least 1/4 full.
l  Fuel pressure regulator OK; checking → Rep. Gr.24
l  Ignition off.
  W00-0688
Test sequence
–  Open fuse box cover on left-hand side of instrument panel.
–  Take out fuse in fuse holder -S228- (left row, 5th large fuse from the top).
–  Connect remote control -V.A.G 1348/3A- for V.A.G 1348 with adapter cable -V.A.G 1348/3-2- to right-hand terminal on socket of fuse -S228-.
–  Connect crocodile clip to positive (+) terminal of battery.
  A20-0791
–  Remove filler cap from fuel filler neck.
–  Remove cover -1- at right of engine compartment.
  WARNING
The fuel system is pressurised. Before opening the system place a clean cloth around the connection. Then release pressure by carefully loosening the connection.
  A10-1030
–  Disconnect fuel return hose from hose connection on fuel rail.
–  Fit auxiliary hose -arrow- onto fuel rail and hold end of hose in measuring container.
–  Press remote control button for 15 seconds.
  A20-1008
–  Compare amount of fuel delivered with minimum delivery shown in diagram (cm3/15 sec.).
  Note
Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.
Assembly is carried out in the reverse order; note the following:
  Note
Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue.
–  Connect fuel return hose.
  A20-0260

Removing and installing fuel delivery unit > < Checking fuel pump delivery rate - vehicles with 6-cylinder MPI engine