How to change injectors on a VAZ 2114

Every car owner of an injection car sooner or later encounters problems in the fuel system and begins to think about cleaning the fuel injectors. The task of the injector is to maintain the pressure created by the fuel pump and only at the right moment to open for a fraction of a second to allow the required amount of fuel to pass through. There are a lot of different additives in the fuel, which during engine operation stick to the seat of the injector locking needle. As a result, the injector begins to spray fuel incorrectly or leak fuel when it should be closed. In such cases, it is necessary to clean the injectors or replace them. The recommended period for cleaning injectors is 25,000 km - 30,000 km. Failure to properly maintain fuel injectors can lead to their complete failure, and then only replacement will be necessary.

How to understand when it is necessary to clean fuel injectors

• Loss of dynamics during car acceleration.
• When you press the gas there are jerks and dips while driving.
• The engine is running rough and unstable.
• Fuel consumption has increased.
• It takes a long time to start the engine with the fuel pump running.
• Black smoke from the exhaust pipe.

There are many instructions and methods for cleaning fuel injectors on the Internet, but we recommend using the most reliable and proven one - cleaning in an ultrasonic stand.

How to remove and clean

• Turn off the fuel supply from the fuel rail.
• Disconnect the electrical connector for the fuel injectors.
• We unscrew the two bolts securing the ramp and pull it out.
• We remove the injectors from the ramp and install them in a special stand
• After cleaning, put everything back together in reverse order.

Further in our photo report there are more detailed instructions.

1We begin to remove the fuel injectors for further cleaning. The injectors are located behind the intake manifold.

2First of all, we need to relieve the fuel pressure from the fuel rail. To do this, unscrew the plastic cap indicated by the arrow in the photo.

3And use something sharp to press on the spool valve, first placing a container so as not to pour gasoline all over it.

4Having released the pressure, screw the plastic cap back on and unscrew the 5mm hexagon bolt securing the fuel rail.

5On the other side of the manifold, between the third and fourth injectors, there is another fuel rail mounting bolt.

6It is convenient to unscrew it using a small ratchet with extensions and a 5mm cue ball.

7Under the air filter bellows we need to disconnect the fuel supply hose to the ramp using two 17mm wrenches. And disconnect the electrical connector of the fuel injector wires.

8Now that everything is turned off, lift up the fuel rail with the injectors, pulling them out of their seat in the manifold.

9And we pull out the ramp with injectors and wires towards the right wing of the car.

10Located on the table, disconnect the electrical connectors from the fuel injectors by pressing the metal brackets on the sides of the connectors.

11Pull out the metal clamps of the injectors. They can be removed by hand, but if difficulties arise, you can use a screwdriver.

12We remove the injectors from the ramp and clean them of dirt, preparing them for installation in the stand.

13In a special stand for cleaning injectors, we create WYNN'S liquid pressure and make sure that the injectors do not allow liquid to pass through themselves. Then we turn on the intermittent opening of the nozzles and look at their spray. The liquid is sprayed filling the container in the stand.

14After cleaning the nozzles by passing liquid through them, we lower the nozzles into a container with WYNN'S liquid and turn on the ultrasonic cleaning mode, setting the timer for 30 minutes.

15After cleaning, replace the injector O-rings, if necessary, and install them back into the fuel rail. We recommend lubricating the O-rings with silicone grease before installation to avoid damaging them during assembly.

16It is also necessary to lubricate the rubber bands of the injectors on the installation side of the manifold.

17Here are all the tools needed to remove and install fuel injectors.

18The work is finished. Before starting the engine for the first time, you must turn the ignition on and off several times to fill the fuel rail with gasoline.

The VAZ 2114 (2115) is equipped with engines of 1.5 and 1.6 liters (8 and 16 valves), therefore the performance of the injectors must be selected depending on the type of engine.
If you make the wrong choice, fuel consumption may increase or the internal combustion engine may lose power. The VAZ 2115 injector is no different from the VAZ 2114, so when considering the device of the “fourteenth” model, we will also keep in mind the “15th”. Model 2114 can be equipped with fuel injectors from different manufacturers, and accordingly, the cost of the injectors may also differ. Manufacturers and cost (price range in the Russian Federation): • GM (1300 - 1400 rubles), • BOSCH (1000 - 1200 rubles), • SIEMENS (800 - 1400 rubles). Which injectors should I choose for replacement?
Here you should focus on the part markings.
For example, BOSCH 0 280 158 502 is only suitable for a 1.5 l 8-valve engine. It’s hard to say anything about the manufacturer; the quality of all products is approximately the same. . It is necessary to remove the pipe from the air filter. Remove the terminals from the battery. . We take some kind of container for draining gasoline. . We take a screwdriver and a container, approach the car, unscrew the cap from the valve on the fuel rail (TR), prying the valve nipple with a screwdriver, release the pressure (gasoline will flow from the FR), then screw the cap back on. . Next, we take the keys for 24 and 21 or 22 (so for a square TR, for a round one there are most likely two keys for 24, I don’t know for sure) and try to unscrew the tube that goes to the TR under the throttle pipe on the driver’s side and try to pull it out of the ramp. . Then he unscrews the fuel pressure regulator (FPR) with a ratchet or just a 6-point 5-pointer, we also try to pull it out of the TP, to do this we carefully pull up so as not to tear the white hose that goes from the RTD to the receiver. . We disconnect the chip, impulses pass through it to the injectors. . We unscrew the fuel rail (FR) itself with a ratchet or just a 6-point 5. We pull it towards the receiver, then, when the injectors come out, we turn the FR with the injectors up and carefully pull it out towards the right wing, everything came out and went back in without any problems! . We remove the wiring from the injectors, here you need a screwdriver, press your finger on the spring (U-shaped piece of iron). We try to push it upward with a screwdriver (towards the wires coming out of the injector). Next, we move the spring forward, one end should come out, the other will remain in place, pull the chip up, i.e. remove from the nozzle. . Now you need to remove the clamps from the injectors; to do this, use a screwdriver to pry them off on both sides. Then we try to pull them out with our hands or a screwdriver (whichever is more convenient) and pull them to the side. Then we pull the injector up, if there are rings left in the ramp, as I had, then we take them out with a screwdriver, they come out easily, don’t forget about the ring on the RTD, it’s better to change it in advance, I didn’t buy rings on the RTD, I left the old one. . Everything was removed. In fact, there are quite a lot of reasons why injectors may not work well. And the most common symptoms are described below: • Difficulty starting the engine in any weather; • The engine is running unsteadily; • The engine stalls at idle; • High crankshaft rotation speed at idle speed; • Loss of power, poor response to the accelerator pedal; • When you press the gas, shocks or dips may appear; • High gasoline consumption; • If the nozzle is dirty or damaged, it should be replaced or cleaned. There is no point in repairing it. It should also be noted that today injectors cannot last even 100 thousand km. The VAZ-2114 model can be equipped with different injectors from different manufacturers. Depending on this, durability and their cost also differ. It is recommended to buy not domestic parts, but from other companies, for example, GM, BOSCH, SIEMENS
.
Also, the choice of injectors also depends on the working volume and the number of valves. For 16-valve engines, the performance of such parts will be different than for the 8-valve version. If the parts are selected incorrectly, then most likely, gas mileage will be higher or the car will lose power. If we talk about choice, then preference should be given to the BOSCH brand at number 0280158502
. This is the serial number that is suitable for an 8-valve engine with a volume of 1.5 liters. Injectors fail not only because of their quality; their performance is largely affected by fuel that contains a lot of dirt or large fractions. Cleaning injectors at service stations will not be cheap. Therefore, if you do not check and clean it yourself, then you should think about whether it might be easier to buy new parts and replace them.

Injectors are an indispensable attribute of any car fuel system based on injection type engines. The injectors act as gasoline atomizers and determine the required amount of fuel to be supplied to the combustion chamber. However, during operation there is a gradual depletion of the injectors. To optimize the operation of the entire system and increase engine power, it is recommended to periodically clean and flush the injectors.

Removing and washing injectors

In this article I will describe the process of removing injectors on a VAZ-2107 car. The owner complained about tripping and rough operation of the engine when running on gasoline. After diagnostics, it was discovered that the injectors were clogged. The car is additionally equipped with 2nd generation gas equipment, the so-called “cracker”. In this regard, the view in the photographs may differ slightly from yours (presence of a firecracker, injector emulator, etc.). In Fig. Figure 1 shows the appearance of the engine compartment of the vehicle being serviced.

Let's get started. We unscrew the clamps securing the air pipe using a Phillips screwdriver or a 7 mm socket.

We remove the pipe.

Remove the throttle cable clamp using a “flat” screwdriver, carefully prying it up.

Open the throttle valve and remove the throttle cable.

We unscrew the fastening of the throttle cable using a 10 mm “head”.

We unscrew the fuel lines with two 17 mm open-end wrenches. We unscrew the fastening of the tubes with a Phillips screwdriver.

Remove the vacuum hose from the fuel pressure regulator.

Remove the brake booster hose by unscrewing the clamp with a flat-head screwdriver.

We unscrew the two nuts securing the throttle assembly using a 13 mm “head”. We remove it, holding the washers on the studs, and move it to the side.

Unscrew the intake manifold mounting nuts using a 13 mm “head”. We remove the washers.

Removing the fuel line fasteners

Remove the intake manifold and put it aside.

Unscrew the fuel rail mounting bolts with a 5 mm hexagon.

Remove the injector harness connector by slightly pulling the lock towards you.

We take out the ramp along with the injectors. If the injectors fit tightly on the rings, then you can carefully pry off the ramp with a pry bar.

Remove the injector harness by pressing the latches on the connectors.

Remove the injector clamps by sliding them to the side along the fuel rail.

We take out the injectors. To do this, we stagger and pull them towards ourselves.

We see rust both in the injectors themselves and in the fuel rail. Somewhere a man was filled with gasoline and water.

If you are installing new injectors, you can skip the next few steps. Otherwise, wash the dirt on the injectors with a brush in gasoline. We wash them in an ultrasonic bath. We check injectors for performance and leakage in a test bench.

We install new sealing rings on the injectors, having first removed the old ones, prying them off with a screwdriver.

It is better to put a brown rubber ring on the bottom of the nozzle; it is more heat-resistant and will last much longer. If the condition of the old rings is good, then it is better to leave them, since the quality of the new ones leaves much to be desired.

If necessary, replace the injectors with new ones. You need to buy according to the number on the nozzle. In our case, Bosh 0 280 158 502.

We wash the fuel rail with gasoline or Abro carburetor cleaner and blow it with compressed air.

Read, it might come in handy: All about the VAZ-2107 carburetor

Before installing the injectors into the fuel rail, the rings on the injectors must be lubricated with something, for example WD-40. This helps to avoid damaging the rings during installation.

We install the injector clamps in place. Please note that the fourth injector is installed with the connector in the opposite direction.

We put on the injector harness. We install the nozzles in place, also lubricating the rings with WD-40.

Before disassembling, we noticed that the clapper and the throttle valve were very dirty.

Now is the time to wash the throttle assembly, idle air control (IAC) and gas firecracker.

Next, we collect everything in reverse order, but take into account some points. Don't forget to put the hose on the fuel pressure regulator.

We look at the condition of the throttle assembly gasket and, if necessary, replace it with a new one.

We install new sealing rings for the gas lines.

Be sure to change the fuel filter. For VAZ cars there are filters of the old (with “screws”) and new (with “snaps”) models. In our case, an old-style filter is installed.

To remove the fuel filter, first unscrew the fuel lines using a 17 mm open-end wrench, holding the filter housing with a 19 mm open-end wrench. Then unscrew the filter itself with a 10 mm head.

This is what came out of the filter in our case.

We install a new fuel filter and gas line O-rings. Do not forget to take into account the direction indicated by the arrow on the fuel filter housing.

We tighten the fuel lines without overdoing it and hold them, excluding cutting the fuel rings.

Let's check if we have any extra spare parts left ;). We start the engine and check for fuel leaks and air leaks.

We look at the result obtained and the smooth operation of the engine.

What injectors are installed on VAZ 2114/2115 cars

Almost all types of injectors that the VAZ 2114/2115 are equipped with at the factory can be considered interchangeable. Depending on the year of manufacture, injectors manufactured by Bosch and Siemens of different markings were installed on the car. Bosch injectors:

1. Model 0280 158 022. The product is compatible only with a 16-valve engine with a volume of 1.6 liters.

   The nozzle is black and is designed to operate at an optimal pressure of 3.8 atmospheres.

2. Model 0280 158 017. An injector with this marking is installed on 8-valve engines with a volume of 1.6 liters. The body is also black.
3. Modification 0280 158 996 is considered obsolete, since injectors with this marking were installed on cars until 2006. The model was intended for 8-valve power units.

Standard equipment for VAZ 2114/2115 injection engines Siemens injectors:

1. VAZ20734 is made in an orange case. The model can be installed on a VAZ 2114/2115 of any year of manufacture, but the modification is paired with an 8-valve engine.
2. Model VAZ20735 is intended for a 16-valve engine. In terms of its characteristics, it is practically no different from the previous model. The nozzle has a blue marking.

Depending on the marking, it can be used on different types of engines.

Replacing injectors

The difficulty in identifying problems in the operation of injectors is that the fuel system is quite branched and it is necessary to diagnose the functionality of all its parts. For example, a malfunction such as a decrease in engine power can have two reasons - failure of the injectors or exhaustion of the pump's life.

Clogged injectors can result in sudden jerking of the engine while driving or unstable idle speed. In addition, an increase in fuel consumption can be considered a sign of injector failure.

You can check the functionality of each injector even without removing them. Simply start the engine and remove the wires from the connector of each injector one by one. If immediately after removal the engine starts to twitch or stalls, then the injector is fine. If the stability of the engine does not change with removal of the wire, then the injector needs to be thoroughly cleaned or even replaced.

This material will help you to independently replace or wash the injectors on VAZ 2110-2112 cars: https://vazweb.ru/desyatka/pitanie/zamena-forsunok-vaz-2110-8-klapanov.html

Why do you need to clean or replace injectors?

The main problem is contamination of the nozzle hole when the fuel cannot be sprayed normally.

If the injector stops working completely, no fuel enters the cylinder. Another problem occurs when the injectors do not open/close completely, do not hold pressure and “pour” fuel into the manifold.

These malfunctions and problems indicate the need to clean the injector. Experts recommend performing this procedure every 40 thousand kilometers. If cleaning cannot solve the problem, then the injectors should be replaced.

Otherwise:

• the efficiency of fuel supply to the engine is impaired;
• engine power disappears;
• the quality of the fuel-air mixture deteriorates;
• the power unit operates unevenly;
• fuel consumption increases.

Causes of injector malfunctions

Normally, the injectors should work with high precision, their operating speed is also very high (opening and closing occurs several times in 1 second).

This is necessary for uninterrupted supply of the engine with an “optimal” mixture in different modes, as well as to ensure fine atomization of gasoline (for better mixing of fuel with air). It is also important that the injector closes tightly, preventing fuel leaks into the intake manifold.

However, during the operation of the car, the condition of the injector is directly affected by the quality of gasoline and the overall cleanliness of the fuel system. Even small debris can clog the injector holes, causing the spray pattern to become very poor. Also, deposits form on the nozzles, which leads to jamming, untimely and/or incomplete opening and closing, etc.

Please note that the need to replace 2114 injectors occurs much less frequently than the need for cleaning. The reason is the fairly high reliability of the injectors. As a result, problems can often be eliminated by cleaning the injectors.

How to remove

The procedure for dismantling and installing injectors is not particularly difficult, but it does take a lot of time. You need to prepare a set of tools in advance:

• 2 open-end wrenches for 17;
• crosshead screwdriver;
• screwdriver with a flat thin blade;
• hex key 5.

None To relieve fuel pressure, you must turn off the fuel pump. It is located in VAZ 2114/2115 cars in the fuel tank. The easiest way to get to the pump is through the hatch located under the rear seat cushion. For this:

1. The seat needs to be reclined.
2. Find a small hatch under the rug.
3. Unscrew the screws securing the hatch.
4. Remove the cover and remove the contact block from the fuel pump housing.

Then you need to start the engine. The engine will run on the amount of fuel that remains in the system, since the pump will not build up pressure after removing the block. You must wait until the engine has completely used up the remaining gasoline and stalls.

None The procedure for removing injectors is as follows:

1. Open the hood of the car and remove the wire from the negative terminal on the battery.
2. For ease of dismantling, it is recommended to remove the air filter box. It will prevent free access to the engine.
3. After that, use your finger to snap off the plastic retainer on the engine and disconnect the connector from the throttle valve.
4. The connector from the idle air control regulator is removed in the same way.
5. Next, you need to disconnect the connector block from the wiring harness of the injectors themselves.
6. The injectors can only be removed together with the fuel rail. Therefore, you need to unscrew the bolts securing the ramp to the body.
7. After which it will be possible to move the ramp to the side so that each of the nozzles moves slightly out of the mounting socket. The wires are removed from the injectors, otherwise it will be impossible to pull out the ramp.
8. The ramp is pulled out and placed in a clean place. Now you can easily remove all the injectors - they are pressed out using a plastic clamp.

Disconnecting the injectors is possible only after dismantling the ramp itself. Accordingly, new products are inserted in place of the old ones. And then the installation work is carried out in the reverse order.

How to clean injectors

Methods for cleaning sprayers may vary; the use of one method or another depends on the level of contamination of the holes and the nature of the deposits. If you carry out preventive cleaning or remove light contamination, you can use special chemicals, the use of which does not involve removing the injectors.

If the injectors are in a neglected state and cleaning with additives does not make sense, then you will have to dismantle the injector and replace the injectors.

First cleaning method

For this method, you will need injector cleaner, carburetor cleaning fluid (spray), a spare O-ring and a pump with a pressure gauge. The first thing you need to do is remove all the nozzles, because if you decide to clean it, you need to do this with all the nozzles, and not just one. Find a suitable container and pour the injector cleaning fluid into it. Place all the injectors in a container and leave them there for a while to allow them to acidify. While the injectors are in the container, take the prepared carburetor spray and clean the idle air control with it. Now inspect the area around the injector nozzle; carbon deposits form there - coke, which in its consistency resembles resin. You will have to take some kind of metal object and tinker with this type of contamination. In order to carry out internal cleaning of the injectors, you need to prepare a power source (from 3 to 12V) and a foot-operated mechanical pump equipped with a pressure gauge.

Remove the tip from the hose and pour injection cleaner into the resulting hole. After this, put the end of the hose on the nozzle. Pump up the pump to 6 atmospheres and apply a voltage of 3V to the injector. If you do not hear the injector click, then you need to add voltage. You need to apply voltage periodically, while not forgetting to pump up the pump to six atmospheres. Clean all injectors in this manner.

Second way

For this method you need a carburetor cleaner spray and also a pump with a pressure gauge. We repeat all the operations indicated in the previous method, only change the injector cleaner to a carburetor cleaner. It is mandatory to carry out external cleaning to remove carbon deposits. To do this, take a clean cloth and apply the cleaner to it. Treat all fuel units with this cloth. Gradually, under the action of the cleaner, the coke will soften and be cleaned off without any problems. You can help yourself with a screwdriver or toothpick.

Read, it may come in handy: How to prepare the cooling system of a VAZ-2107 for winter

Both operations should take an average of two hours of your time, but you will save a lot and learn how to clean injectors.

How to clean injectors with additives

If, during diagnostics using a multimeter, it was determined that one or more nozzles need cleaning, then the easiest way to do this is to use special chemicals. In this case, the injectors do not need to be removed from the car. However, this method is not appropriate in all cases. If the sprayers are in a neglected state, they will need to be removed and cleaned on a stand.

Washing of VAZ 2107 injectors is carried out on a special diagnostic stand. To carry out the procedure, you will need to remove all 4 sprayers from the car and install them on the stand. Special products are used as cleaning fluids. The disadvantage of this method is that its implementation will require an expensive stand. Such stands are available in car service centers, and the principle of washing nozzles is as follows:

1. All 4 sprayers are secured to the stand.
2. A cleaning liquid is poured into a special container; as a rule, it is a carburetor cleaner.
3. The program starts, and the stand automatically cleans the injectors for a certain time.

If the option of using a stand is available to drivers only in car repair shops, then the use of special preparations allows cleaning to be carried out at home. To flush the fuel nozzles along with the fuel system, you will need to use special chemicals. They are recommended to be used every 20 thousand km. The principle of their use is that the pump is disconnected from the fuel line. A special cylinder is connected to the hose, from which liquid will be supplied under high pressure.

The engine starts, after which it continues to run at idle for half an hour. After the engine has been running for 30 minutes, you need to turn it off and wait half an hour. During this time, all deposits will soften. The engine starts again, but this time you need to increase the speed to maximum. This will allow the remaining slag and other deposits to be removed from the system.

Repair of injectors VAZ 2114/2115

Repairing injectors involves carrying out a number of works at once:

• cleaning;
• purging;
• replacement of rubber seals.

After the products have been removed from the fuel rail, you need to take a good look at each of the four nozzles. If there are visible signs of leakage on the body, repair will not be practical. You will have to immediately replace the nozzle with a new one.

The differences in flushing and cleaning procedures for 8-valve and 16-valve engines are not significant. Therefore, you can be guided by the same scheme.

Video: the easiest way

If the body is clean and there are no deformations or cracks on it, then repair work is allowed . To do this, you will need to remove the seal from the body and the sprayer. It is recommended to leave these parts in acetone or solvent for 1.5–2 hours. While the parts are being washed, you can use a vacuum cleaner to clean the fuel rail. Next, you need to carefully clean the place where the injectors fit into the ramp using a toothpick or a needle.

After this, you can start purging the nozzle from the inside. You will need a roll of electrical tape, an aerosol can for cleaning carburetors and a syringe. An aerosol cleaning liquid is supplied through a thin syringe into the nozzle cavity.

It is better to wrap the joint between the syringe and the tube of the canister for sealing with electrical tape. It is recommended to repeat washing the nozzle from the inside three times. Afterwards the product must dry.

A cheap product will perfectly remove dirt and deposits from the nozzle. Before installation, each nozzle is tested for resistance. The tester readings should be in the range of 11–15 ohms.

There is also a simple way to clean the injectors, without dismantling the fuel rail. However, it is only appropriate in cases where the injectors have not yet exhausted their entire service life (120–150 thousand kilometers). The use of cleaning additives in gasoline is allowed. In this case, all elements of the fuel system will be cleaned, but its closed nature does not allow removing dirt and sediment from low-quality gasoline.

A broken fuel pump can cause serious problems. You can read more about this here: https://vazweb.ru/desyatka/pitanie/zamena-toplivnogo-nasosa-vaz-2114.html

The liquid is poured into the gas tank and, together with the fuel, cleans all elements of the system.

Replacing rubber rings and seals on injectors

Usually, when washing or repairing injectors, car enthusiasts immediately change all rubber elements. This is due to high wear rates. The cost of rings and seals is very low, but after replacement you can immediately observe the stability of the motor.

Rings and seals can be removed with one movement of the hand. However, installing new ones will require care, as it is easy to damage the rubber. The plastic element is first lubricated with gasoline, and then pulled in place of the old seal.

Spare parts for VAZ injectors can be purchased at a minimal price. Almost every driver can clean or replace the injectors on VAZ 2114/2115 cars on their own. Difficulties can arise only in the process of unscrewing the fuel rail or reconnecting the wires to the injector contacts. However, if each stage of work is carefully carried out, even a beginner can independently maintain this element of the fuel system.

• Author: Veniamin
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Before moving on to the procedure for removing injectors, I recommend that you first become familiar with what INJECTORS are and what functions they perform in the power supply system of an engine with distributed injection. You can read about this in detail on the website in the article Fuel injectors.

Checking injectors without removing them

First of all, with the engine running, you need to feel the injectors with your hand.
Normally they vibrate as they constantly open and close. If any injector does not vibrate, this indicates that it is not working. You can also additionally check the operation of the injectors by unscrewing the cap nuts with the engine running. If the speed decreases when unscrewing, the injector is working. If, after unscrewing the nut on any injector, the speed does not change, this indicates a problem with the injector.

There are several reasons for failure:

• the control signal does not arrive;
• No power supply;
• the injector has failed.

At the initial stage, you need to check the power to the injector, connectors, contacts, wiring, etc. If the diagnostics are inconclusive, the injector may need to be replaced.