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Wiring and component check with adapter V.A.G 1598/30 or V.A.G 1598/31 > < Removing and installing injector with needle lift sender G80

A4 Mk1

Checking spray pattern of injectors and checking for leaks
Checking spray pattern of injectors and checking for leaks
Check injectors using injector tester -V.A.G 1322- and pressure pipe -V.A.G 1322/2-.
  WARNING
When testing injectors, ensure that the jet of fuel does not contact the hands as the high pressure will cause the fuel to penetrate the skin and may cause severe injuries.
l  Pressure gauge switched on
–  Move pump lever down slowly. Read off injection pressure when injector opens. If the pressure does not match the specification, fit a new injector.
   
New injectors200 ... 235 bar
Wear limit170 bar

Checking for leaks
l  Pressure gauge switched on
–  Move pump lever down slowly and maintain a pressure of approx. 150 bar for 10 seconds. There should be no fuel leakage from the injector nozzle.
–  Renew injector if leaking.
  Note
t  This engine is equipped with dual spring injectors. The fuel is therefore injected in 2 stages.
t  If a fault occurs with this type of injector, the injector must be renewed as it is not possible to adjust the pressure setting or repair faults.
   

Wiring and component check with adapter V.A.G 1598/30 or V.A.G 1598/31 > < Removing and installing injector with needle lift sender G80