What injectors to put on a VAZ 2109

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.

Carburetor. Advantages and disadvantages

Let's start with the negative points. These include:

Such engines have not been installed on production cars for a long time. In Europe, due to environmental requirements, carburetors are blacklisted. That is, they are prohibited because they heavily pollute the atmosphere;
At high speeds, the engine's capabilities drop significantly. Torque does not reach the desired levels. But at low speeds it is effective and allows you to accelerate well from zero to hundreds;
When overtaking, the carburetor is a pain. It is problematic to overtake cars normally and confidently. Especially considering the power of the carburetor nines;
High fuel consumption when compared with injection engines. On average, a nine with a carburetor in normal mode consumes about 8.5-9 liters of fuel per 100 kilometers;
The air damper is controlled manually. The exception is some versions of the latest samples, where automatic devices have been installed. Some motorists claim that manually controlling the throttle in winter has its advantages, as it allows you to feel the engine. But only experienced drivers can understand this.

Nine carburetor

But let's not just talk about the bad. The VAZ 2109 with a carburetor also has positive qualities:

The cost of a carburetor is much cheaper than an injection engine;
Engine maintenance costs less, and the work itself is easier to perform if you repair it yourself;
Fans of carburetors claim that the absence of control units and microcontrollers is an undeniable advantage. Although one can argue with him;
If the engine fails even 100 kilometers from the nearest settlement or service station, it is not a problem for experienced drivers, since repairs can be carried out even in the field. But this will require the availability of appropriate tools and passenger assistance.

Swapping a couple of armored pipes and doing a purge is a simple option for quickly repairing a carburetor yourself. The injection engine does not understand such tricks.

Injector. Advantages and disadvantages

In short, all the advantages of the injector are the disadvantages of the carburetor, and all the disadvantages are the advantages of the carburetor.

Injection nine

The key features of injection engines include:

Injectors are more environmentally friendly and meet the requirements for emissions of harmful substances;
Although the torque is insufficient at low speeds, it makes overtaking easier at high speeds. The engine seems to get a second wind;
Injector maintenance costs are higher;
For normal operation of such an engine, clean fuel is needed. The carburetor “feeds” on everything;
To check faults, it is necessary to perform diagnostics, which is time-consuming and expensive;
The injector consumes less fuel. The average is 6-7 liters per 100 kilometers;
Almost all systems function through computer control, therefore, when working correctly, the engine operates as efficiently and economically as possible;
It is possible to install HBO on the injector. But with a carburetor, such a step is fraught with a number of difficulties.

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.

Signs of malfunction of VAZ 2109 fuel injectors

There are a number of signs that indicate the need to at least remove and inspect the fuel nozzles. After this, a decision is made to replace or clean the components. Pay attention to how the vehicle and specifically the power unit behaves. They will point you to problems with the injectors. This can manifest itself like this:

The motor produces less power, and the previous acceleration efficiency is not felt.
With poor engine performance and lack of power, fuel consumption continues to increase.
Poor starting is not a rare symptom of injector failure.
If the power unit does not hold idle speed well, this may also indicate problems with the injectors.
Increased amount of toxic elements in exhaust gases.
Increasing idle speed.

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!

Choosing garage technicians: a simple and safe way

Using a milling cutter, grind the saddle all the way through one edge. The seat will weaken, lose tension and jump out of the seating hole on its own, without even having to sharpen it through, reaching the seating plane, when a little less than 0.5 mm of tension remains, the tension is no longer enough to hold on. By opening the ring, the saddle will no longer be able to resist.

A drill cutter is sold in any hardware store and costs no more than a drill, which is why this method is so affordable.

Now that the saddle is out, we need to think about what we are going to put in there.

Valve seat blank

For all popular engines, valve seat blanks are offered, both standard sizes and repair ones, with an increased outer diameter. For rare engines, blanks must be ordered or made to order.

Such blanks are quite cheap; if you don’t find one for a certain motor, you can choose the size from the available items. But don’t forget that companies that produce engine parts (Kolbenschmidt), in particular valves, also produce seats of the same sizes, so ask in stores in your city. After installation, the seat will need to be processed - chamfered for the valve.