A3 Quattro V6-3.2L (BUB) (2008)
Injection Quantity, Checking
-
Connect adapter cable (V.A.G 1598/31) (test box) to wiring harness to Engine Control Module (ECM) => [ Wiring and Components, Checking
with 121-Point Adapter Cable on ECM ] See: Computers and Control Systems/Engine Control Module/Testing and Inspection. The Engine
Control Module (ECM) is not connected.
-
Bridge terminals 1 and 65 at test box using wires from adapter test kit (V.A.G 1594 C).
-
Disconnect electrical harness connectors for fuel injectors.
-
Place a fuel injector into a graduated measuring glass of injection quantity test device (V.A.G 1602).
-
Connect one terminal of fuel injector to plus wire and an alligator clip from connector test kit (V.A.G 1594 C) to engine Ground (GND).
-
Connect second terminal of fuel injector to remote control (V.A.G 1348/3 A) using adapter cable (V.A.G 1348/3-2).
-
Connect alligator clip to battery plus (+).
-
Bridge terminals 1 and 65 at test box using wires from adapter test kit (V.A.G 1594 C).
-
Connect battery Ground (GND) cable if necessary.
-
Switch ignition on.
‹› Fuel Pump (FP) must run.
-
Press switch on remote control connection (V.A.G 1348/3 A) for 30 seconds.
-
Perform measurement at all fuel injectors using a new measuring glass for each.
‹› Also check spray pattern when testing injection quantity. Spray pattern must be the same for all injectors.
-
After all 6 fuel injectors have been activated, place measuring glasses on an even surface.
‹› Specified value of injection quantity for each fuel injector: 128 to 4.73 fl oz
If measured value of one or more fuel injectors is not within tolerance range:
-
Shut off Fuel Pump (FP) (switch off ignition) and replace malfunctioning fuel injector => [ Fuel Injectors ] See: Service and Repair/Removal and
Replacement/Fuel Injectors.
If measured values of all fuel injectors are outside specified range:
-
Check fuel pressure => [ System Pressure, Fuel Pressure Regulator and Residual Pressure, Checking ] See: Testing and Inspection/System
Pressure, Fuel Pressure Regulator and Residual Pressure, Checking.
-
Install fuel injectors together with fuel rail => [ Installation is in reverse order of removal,