BOSCH injectors

Their use depends on the engine size and the number of valves. There is no particular variety in VAZ-2114 engines, so there are only the following options:

• Nozzle BOSCH 0280 158 022. The nozzle is marked black, has a productivity of 1.9644 mg/sec, operates under a standard pressure of 3.8 atmospheres. Installed on a 1600 cc engine with 16 valves. Works with January 7.2 controller.

BOSCH nozzle: productivity 1.9644 mg/sec

• Nozzle BOSCH 0280 158 017. The nozzle is also marked black, has a thin spray and a productivity of 1.922 mg/sec. The standard pressure is identical to the previous one - 3.8 atm, can be installed on a 1.6 liter 8-valve engine. Works with January 7.2 controller.

• Injector BOSCH 0280 158 996. Used until 2006, can be replaced with BOSCH 0280 150 110. Both injectors are designed for use in an 8-valve 1.5-liter engine. The only difference is in performance - the 996 has a performance of 1.653 mg/sec, the new 110 operates with a performance of 1.7 mg/sec, which has virtually no effect on engine performance.

The new injector may have a thicker O-ring and, accordingly, a longer nozzle. The injectors are completely interchangeable. These injectors can only work with the January 5.1 controller.

In addition, you need to know which engine control controller is installed on the car, since January 5.1 and January 7.2 may require injectors of different capacities.

Siemens Deka injectors

There is no certainty with Siemens injectors, since the plant can install injectors of different markings on the same engine. However, there is a clear difference between the injectors for eight-valve and 16-valve engines.

In the first case, the nozzle is single-flame, in the second - double-flame, that is, it sprays fuel onto each of the intake valves separately.

They are marked as VAZ20734 (orange markings) and 20735 (blue markings). On eight-valve engines, a Siemens 6393 nozzle with a thick torch can be used. Its productivity is 1.662 mg/sec, and its operating pressure is 3 atm. Each of these injectors can be installed on a VAZ-2114 engine.

When to change: self-diagnosis

The fuel system of an injection engine has a fairly extensive architecture and faults can only be identified after an accurate diagnosis of each of the system elements. For example, a drop in engine power may be the result of either a malfunction of the injectors, insufficient performance of the fuel pump or a clogged fuel filter.

In addition, jerks and dips, unstable idle and difficult starting, increased consumption, can occur when the injector is simply clogged.

You can check the injectors themselves directly on the engine without removing them. To do this, just start the engine and remove the wires from the connector one by one. If the stability of the engine changes at the same time, the engine starts to oscillate, then the injector is in order. If, when removing the wires from the connector, the stability of the motor does not change, the injector needs to be cleaned or replaced.

What are the main requirements for the operation of injectors?

types of nozzles

1. Perfect atomization
2. Accuracy of fuel flow

If these requirements are met, the engine will operate at 100% of the specified standards.

But machines, as a rule, are actively used, and at the same time physical wear and clogging occurs with mechanical particles and petrochemical deposits that appear in the nozzle channel and nozzle. As a result of such contamination, the shape of the spray torch is disrupted and its throughput of the nozzles is reduced.

Replacing injectors (full technology)

Before replacing injectors on a VAZ-2114 of any generation, it is necessary to relieve the pressure in the power system.

To do this, remove the rear seat cushion, open the hatch and remove the contact block from the fuel pump. Now it is de-energized and will not build up pressure.

We start the engine and wait a few minutes until all the fuel in the system is used up. The pressure has been relieved, now you can safely remove the old injectors and replace them with new ones. We proceed according to the following algorithm:

• We de-energize the car by removing the negative terminal from the battery.

Disconnect the negative terminal from the battery

• Remove the air filter and hose from the pressure regulator in the power system.

Remove the hose from the pressure regulator

• We press the plastic latch and remove the connector from the throttle position sensor.

Disconnect the electrical connector of the throttle position sensor

• In the same way, remove the connector from the idle air regulator.

Disconnect the connector from the idle air regulator

• Disconnect the connector block from the injector wiring harness.

Disconnect the connector block from the injector wires

• Unscrew the fuel rail mounting bolts.

Unscrew the fuel rail mounting bolts

• We move the fuel rail so that each of the injectors comes out of their seat.

We dismantle the fuel rail with injectors

• We release the spring clip and remove the wires from each injector.

Squeeze the spring clip and disconnect the electrical connector of the injector.

• We remove the injector from the ramp and replace it with a new one.

Rock the injector and remove it from the fuel rail.

Installation of injectors is carried out in the reverse order. Before installation, it is advisable to check the integrity of the O-rings; if they have lost their elasticity, it is better to replace them with new ones. The injectors are installed and ready for further use. Good luck to everyone!

Pro tips: how to choose new good quality injectors

To select high-quality injectors, give preference to original parts. It is necessary to select injectors for the VAZ 2109 by catalog number, since they come in different sizes and performance.

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Sources used:

• https://vaz-russia.com/remont-vaz-2108/zamena-toplivnyih-forsunok-na-vaz-2108-vaz-2109-vaz-21099.html
• https://vaz-russia.com/remont-vaz-2108/chistka-forsunok-na-vaz-2108-vaz-2109-vaz-21099.html
• https://automanya.ru/remont/proizvoditelnost-toplivnyh-forsunok.html
• https://prosedan.ru/chistka-i-zamena-forsunok-vaz-2109-inzhektor