Examination
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Remove the decorative engine cover (see "Engine trim panel - removal and installation").
3. Disconnect the injector wiring harness connectors.
4. After turning on the ignition, use a voltmeter to measure the voltage at the power terminal 3 of the control system wiring harness connector, which should be no less than 12 V (the terminals are marked with letters on the connector, the negative probe of the device should be connected to the engine ground).
Warning! After completing the voltage measurement, turn off the ignition.
Note: If the voltage does not reach the connector or is less than 12 V, the battery is discharged, the power supply circuit is faulty, or the ECU is faulty.
5. We check the electrical resistance of the injectors, for which we use an ohmmeter to measure the resistance between terminal 3 and the other four terminals of the injector wiring harness block and the detonation and camshaft position sensors. The connector terminal marked with the number 8 corresponds to the injector of the first cylinder, and terminals 7, 2 and 1 correspond to the injectors of the second, third and fourth cylinders, respectively. Serviceable injectors should have a resistance of 13 Ohms.
6. Using two wires directly from the battery, apply 12 V to the terminals of connector 2 - connect terminal 3 to the positive terminal of the battery, and terminals 8, 7, 2 and 1 in series with the negative terminal of the battery. If the injector is in good working order, a characteristic click should be heard when the valve opens.
7. Replace faulty injectors.
Removal
1. Remove the fuel rail (see "Fuel rail - removal and installation").
2. We check the condition of the injector nozzles 1 by visual inspection.
3. Remove the injector holder 2. Remove the injector 3 from the fuel rail.
Recommendation. Injectors with clogged nozzles should also be replaced, as should injectors with faulty windings.
4. Remove the injector from the ramp.
5. Similarly, remove the three remaining injectors.
(Article based on data from the website: www.LadaMan.ru)
Installation
Note: The manufacturer recommends replacing the sealing rings.
New injectors are usually supplied as spare parts already with seals. In the event that the injectors have to be removed for purposes other than replacement (for example, when performing other repair work), then before installation it is necessary to purchase new sealing rings.
1. Install new sealing rings on the injectors. Before installation, wipe the injector sealing rings with engine oil.
2. Install the injectors in reverse order.