SEQUENCE OF WORKS
1. A faulty injector can be identified with a bare hand, as a normally working injector should vibrate when the engine is running. This test should be performed on a cold engine.
2. Disconnect the electrical connector from the injector and connect an LED tester (not a test lamp) to the connector contacts.
3. Start the engine. The LED tester should flash, otherwise there is no voltage supplied to the connector contacts. In this case, the engine control unit may be faulty, which can only be checked in a car repair shop.
4. Disconnect the electrical connector from the injector and measure the resistance between the two contacts of the connector on the injector. At a temperature of 20°C, the resistance of the injector should be (14.5±1) Ohm.
5. If the injector resistance differs significantly from the required value, replace the injector.
6. Remove the fuel distribution line together with the injectors.
7. Disconnect the electrical connectors from the injectors, but the fuel lines must remain connected.
8. Turn the ignition on and off several times to allow the fuel pump to create pressure in the fuel system.
Checking the tightness of the injectors
9. Check the injectors for leaks one by one. Only one drop of fuel should flow out of each injector. If more fuel flows out, replace the injector.
10. If it is necessary to check the fuel spray pattern, it is necessary to remove the fuel distribution line. The fuel lines must remain connected to the injectors. Disconnect the electrical connectors from all injectors except the one being checked and install a special glass vessel under the injector being checked.
11. Turn on the ignition, and fuel should spray out of the injector being tested in the shape of a cone.
12. Repeat the tests on the remaining injectors.
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