Lower the nozzle into the beaker.
Start the engine, let it run at about 2000 rpm, and check that the fuel injected from the injector is in the shape of a regular cone.
Stop engine. In this case, not a single drop of fuel should appear from the atomizer of the nozzle.
Check the other injectors in the same way.
More accurately, you can check the technical condition of the injectors using a stand that includes a hand pump and a nanometer.
Connect the injector to be tested to the stand according to the operating instructions and check the fuel injection pressure. A properly working injector should inject fuel 2 at a pressure of 2.5-3.5 kg/cm2.
Check the tightness of the injector. To do this, using the bench pump, create a pressure of 0.5 kg / cm2 less than the fuel injection pressure by the injector, and maintain it for 15 s, during which no injector spray should leak drops of fuel.
Press the stand pump lever at a frequency of one stroke per second. In this case, fuel should be sprayed from the injector atomizer with a hum in the form of a cone at an angle of approximately 35°.
If the nozzle does not meet at least one of the above requirements, it must be replaced.
![](https://www.audimanual.ru/img/80/2095.jpg)
Injection nozzle section: 1 - sprayer body; 2 - sealing ring; 3 - nozzle body; 4 - conical filter.
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