Nozzle in a beaker
2. Using an auxiliary cable and an "alligator" clip (from VAG 1594 A kit) connect one of the contacts to the engine ground.
3. Connect the second contact of the valve injector to the "plus" using the VAG 1348/3A remote control, the VAG 1348/3-2 adapter and an auxiliary wire.
Connecting the nozzle to the mass and "plus"
4. Using the wires from the VAG 1594 auxiliary measuring kit, short-circuit contacts 1 and 65 on the test device,
5. Turn on the ignition. The fuel pump should work.
6. Operate the VAG 1348/3A remote control for approximately 30 seconds.
7. Repeat this procedure with all injectors. After sequentially applying voltage to all three injectors of one cylinder bank (in 6-cylinder ASN engine) or four injectors of the entire engine, place the measuring cup on a flat surface.
8. The nominal value for each injector is:
- in the ASN engine from 90 to 125 ml,
- in the ALT engine from 85 to 105 ml,
- in the AVJ engine from 125 to 145 ml,
- in the ALZ engine from 85 to 105 ml.
9. If the measured value for one or more injectors is outside the tolerance range, turn off the fuel pump (remove the jumper, turn off the ignition) and replace all defective injectors. In the case of a 6-cylinder ASN engine, also check the injectors of the second row of cylinders.
10. If the measured values are outside the tolerance range for all injectors, there may be something wrong with the fuel supply pressure. Check the fuel supply pressure (checking the system pressure using VAG 1318 or a suitable pressure gauge).
11. When checking the amount of fuel injected, also check the shape of the spray jet. The jet should be the same for all injectors.
12. After testing and replacing the injectors, reinstall the injectors together with the fuel distributor.