Nozzle in a beaker
2. With auxiliary wire and clamp «crocodile» (from the VAG 1594 A kit) connect one of the contacts to the engine ground.
3. Using the VAG 1348/3A remote control, the VAG 1348/3-2 adapter and an auxiliary wire, connect the second contact of the valve injector to «plus».
Attaching the nozzle to the mass and «plus»
4. Using the wires from the set of auxiliary measuring instruments VAG 1594, bridge between contacts 1 and 65 on the test device,
5. Turn on the ignition. The fuel pump must be running.
6. Operate the VAG 1348/3A remote control for approximately 30 seconds.
7. Do this procedure with all nozzles. After sequentially applying voltage to all three nozzles of one row of cylinders (in 6-cylinder ASN engine) or four nozzles of the entire engine, place the beaker on a flat surface.
8. The nominal value for each nozzle 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 out of tolerance, turn off the fuel pump (remove the jumper, turn off the ignition) and replace any 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 out of tolerance for all injectors, there may be something wrong with the fuel supply pressure. Check fuel supply pressure (checking system pressure using VAG 1318 or a suitable pressure gauge).
11. When checking the amount of injected fuel, also check the shape of the sprayed fuel jet. The jet must be the same for all nozzles.
12. Upon completion of the test and replacement of the injectors, mount the injectors together with the fuel distributor again.
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