Cleaning and repairing the throttle valve on a VAZ 2115

Welcome! The throttle valve becomes dirty over time, due to this it begins to open and close worse, and uneven idling also appears, because the layer of dust that is present on the valve does not allow air to properly enter the car engine, and this is especially noticeable when the foot is the gas pedal is removed, just when the foot is removed from the pedal, the throttle is almost completely closed, but there is a small gap through which air enters the engine, and if there is a lot of dirt and dust in this place, then the air will not normally enter the engine, so it is idle the progress will be uneven.

Note! To replace this part, you will need to stock up on: A set of all the keys that you have, and in this set there must be an extension cord, or a wrench with socket heads, in addition to this, you will need a carburetor cleaner, which you can find in a car shop, and a rag, which You will remove all the dirt from the damper and by the way, stock up on all the screwdrivers you have!

Where is the throttle valve located? Before continuing to write, we will point out to you one very important nuance, the throttle valve is the wrong name for the unit that you are currently thinking about, its correct name is the throttle assembly (Indicated by a red arrow), but the valve itself is already inside this unit and plays a very large role in it, opening and closing at the moment when you need it.

When should you clean your throttle body? It doesn’t get clogged up very quickly, so it needs to be cleaned quite rarely, but it depends on how you drive and on what roads, for example, if the car is driven every day on a dirt road where there is a lot of dust, then the damper will quickly become dusty and dirty and will require cleaning, but if the car is used mainly in the urban cycle or, even better, in the countryside (in towns, etc.) on roads, then in this case the damper will need to be cleaned less often, so there are no exact figures as such when it needs to be cleaned , as they say, everything is determined by appearance and by symptoms (the car idles unstably, its speed fluctuates, it even stalls sometimes, etc., these are the symptoms of a dirty damper, but although they are due to other problems may also meet).

Note! In order for your damper to become dirty less often, we recommend changing the air filter on your car as often as possible or simply replacing it when it really requires it, and especially do not delay replacing it when it requires it (It will be covered in dust in this case and this dust will fly into the engine and the throttle valve, on top of all this it will pollute)!

Cleaning the throttle valve of VAZ 2114-2115. How to clean the damper on the “fourteenth” with your own hands?

Hi all. This is VAZ Repair, and today in the “Repair 2114” section you will learn how to clean the valve, throttle valve with your own hands , naturally.
The work is not dusty and does not require special skills and knowledge. Moreover, we have already talked about this on our website; last time the throttle valve was cleaned on the “ten”. It’s worth noting right away that there are no fundamental differences in performing this work on different VAZ models, the principle is the same - remove the throttle assembly, take a special liquid and spray it on the valve. In rare cases, you have to make more effort and rub the throttle with cotton swabs or even a toothbrush.

As always, before we begin, a few words about what a throttle valve is, why it gets dirty and how to understand that the throttle valve needs to be cleaned . Go.

Diagnostics and cleaning of IAC

Be sure to check its condition - there should be no dirt on it. Remove the regulator and connect it to the wiring block (the ignition must be on). The rod should retract completely and extend a few millimeters. Visually assess the condition of the device to see if there is any damage to it. Very often, the cause of unstable speed is a weakened or burst spring. In this case, it will need to be replaced. Cleaning the throttle valve on a VAZ-2114, done by yourself, still won’t hurt.

Use a multimeter to measure between contacts 1 and 2 - the resistance should be in the range of 50-80 ohms. If it is slightly different, there is no need to panic. There should be no resistance between the other contacts. To clean the device, you need to use a penetrating lubricant (spray for cleaning carburetors is not suitable, as it melts the plastic). Be sure to treat the contacts - if they are oxidized, voltage will not be supplied. Using a ruler or caliper, measure the distance from the IAC body to the end of the needle - it should be 23 mm, deviations are not allowed.

What is a throttle valve?

The throttle valve (VV) is an integral part of the fuel system of a gasoline engine. The main task of the DZ is the dosage of air supply, which enters the cylinders to form a combustible mixture. The throttle body is located after the air filter and before the intake manifold. Simply put, the air valve is an air valve that regulates the air supply. When the throttle valve opens, excess pressure in the intake system disappears; when it closes, negative pressure forms in the system. Every time you press the gas pedal, the throttle opens or closes, since the throttle valve is connected to the throttle cable.

When is it necessary to clean the throttle valve?

It is recommended to clean the remote control every 60-70 thousand km. mileage or if signs of throttle contamination appear.

Signs of a dirty throttle body and the need to clean the throttle body:

Poor engine starting, stalls while driving;
Increased crankshaft speed;
Floating idle speed;
Jerking while driving at low and medium speeds.

Causes of throttle valve contamination:

Air. Although it is filtered by an air filter, it still contains dust.
Oiling and crankcase gases. These two substances form an oily coating on the throttle body, preventing the normal operation of the throttle assembly. The damper begins to open and close poorly (poor response to the gas pedal).

Where is the DZ located?

Engine compartment

The entire throttle body is located in the engine compartment. It is located between the intake manifold and the air filter. In other words, the air enters the filter, passes through the mass air flow sensor, enters the remote control, and from there goes to the engine through the intake manifold (receiver). To find out where the remote control is located, pay attention to the figure (number 3).

How to flush the throttle valve of a VAZ 2114-2115

There are two types of cleaning - with and without removal. The first method involves doing the following:

1. Disconnect the air filter bellows, remove the coolant pipes, as well as the adsorber pipe. The coolant pipes must be bolted or bent and clamped to prevent coolant from spilling out.

2. Next, you need to disconnect the throttle control mount, remove the throttle cable and remove the throttle assembly.

3. After the throttle is removed, it is necessary to remove the sensors (IAC, TPS) and clean them.

4. Next, using WD-40 or a special liquid for cleaning the carburetor (for example ABRO), we clean the rear brake. This is done simply, you need to apply the composition to the valve, as well as the inner surface of the throttle and let the special tool do its job. After a few minutes everything will be clean, but if the result does not satisfy you, clean again, using cotton swabs or a toothbrush.

Attention! Never use sharp metal objects!

5. Let the remote control dry, after which everything is assembled in the reverse order.

The second method involves disconnecting the air corrugation and cleaning the throttle valve right on the spot. The principle is the same: the solution is sprayed on one side and the other of the remote control (to do this, you can turn the damper by hand at the place where the cable is attached). I have not tried the second method, because in my opinion, it does not make it possible to fully clean the throttle valve, so I cannot advise this method or talk about the results of such cleaning.

When flushing the throttle valve, I recommend replacing the throttle valve gasket. Basically everything. You can finish the article on how to clean the throttle valve of a VAZ 2114. I think the knowledge gained will be enough for you to repeat all the above steps yourself.

External cleaning

You can clean the throttle valve on a VAZ-2114 without removing the entire assembly. There is one advantage - you will do all the work very quickly, but you will not be able to clean the inside this way. As a result, the channels in the throttle assembly may remain contaminated, but this will not change the situation - all the symptoms will continue to bother you. External dirt can be easily cleaned. For work, it is best to use a special spray for cleaning carburetors. But keep in mind that it is very aggressive, so it is advisable to work in protective equipment - a respirator and gloves. Do not allow liquid to get on plastic elements - it will corrode them.

Cleaning the throttle valve on VAZ 2113, VAZ 2114, VAZ 2115

Idle air control or sensor?

The symptoms described above may not be caused by dirt, but by a faulty idle air control valve. This is an actuator, so it cannot be called a sensor. Many motorists call it an idle speed sensor - this definition is completely incorrect. A sensor is a device that allows you to measure a certain value (number of revolutions, temperature, pressure, etc.).

And the idle air control (IAC) is a stepper electric motor that opens and closes the channel through which air enters the fuel rail when idling. If you open the throttle valve slightly, the IAC is excluded from the entire operation process. Since the device does not measure anything, it cannot be a sensor.

How to clean the throttle valve on a VAZ 2113-VAZ 2115?

1. First, of course, you will need to remove it, about how to do this operation correctly, read the article that is posted on our website, entitled: “Replacing the throttle assembly on a VAZ”, as soon as the damper, or let’s say the throttle assembly correctly, is removed , start cleaning it, to do this, place it on a flat and clean surface and then take the carburetor cleaning fluid in your hands and with its help, go through the entire throttle assembly, but don’t look at the sensors and in general it’s best to unscrew them for you we recommend.

2. When the inside of the assembly is cleaned (By the way, clean with liquid exactly in the place where the throttle valve itself is located, outside the assembly, that is, on its outer part, we do not recommend that you clean it), wipe off any drops and then place the assembly in the sun or just bring it into a warm room, wait for it to dry completely and you can put it back on the car. If you want to clean it better, you can also blow it out with compressed air (Compressed air is in the compressor, in the pump, so something from this find and then use it to blow the throttle assembly from all dirt particles in hard-to-reach places).

Additional video clip: You can see the process of cleaning the throttle assembly in more detail in the video clip located just below, it not only shows everything but also describes it all, by the way, the video uses a VAZ 2112 car, you don’t pay much attention to this Please note, because the throttle units on all cars are cleaned almost identically, but this does not apply to the unit with the e-gas system, where the whole cleaning process occurs completely differently.

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VAZ electronic throttle: design, diagnostics, flushing and repair.

In this material I want to talk about the design, diagnostics and repair of the Delphi electronic throttle valve (pipe), installed on VAZ cars together with the M74 engine management system. The reason for writing this article was one very typical malfunction on a VAZ 2115 car with an atypical cause, which I will talk about a little later. I would like to warn you right away that the author of this article does not bear any responsibility for unqualified intervention and repair of the electronic throttle valve in the event of its failure and emergency situations on the road, since repair of this unit is not provided, but only replacement.

Design. An electrically driven throttle valve (pipe) is designed to dose the amount of air entering the intake manifold. Changing the amount of incoming air is achieved by turning the damper with an electric motor, which is controlled by a controller. Main parts of the throttle assembly: All photos are clickable!

1. Housing 2. Damper 3. Gearbox 4. Electric motor 5. Throttle position sensors.

The connection diagram is shown below:

Removing the throttle assembly: 1. Turn off the ignition, remove the minus terminal from the battery. 2. Unscrew the clamps and remove the intake pipe hose from the throttle body. 3. Disconnect the harness block. 4. Unscrew the 4 bolts securing the throttle assembly from the intake manifold and remove it.

Typical faults and their diagnosis. A childhood problem of the first car releases, error P2135 (Mismatch of signals from sensors A and B of the throttle position) manifests itself in the form of unstable idling, speed limit to 2000 and loss of traction. It can be successfully treated by crimping, bending and soldering the contacts of the throttle body block or by replacing the entire electrical wiring harness. On most cars it has been cured for a long time, on new ones it almost never occurs. Floating speed and unstable idle. Here we will dwell in more detail, since this phenomenon is common and appears sooner or later on almost all cars. The main reason here is the mismatch between the throttle opening angle and the amount of incoming air. On most cars it can be treated by washing. It is advisable to wash the throttle valve at least once every 20-30 thousand km. otherwise, deposits of soot and oil particles create obstacles to air movement during idle with all the ensuing consequences. Therefore, the throttle assembly must be kept clean and tidy - this is an axiom. The second reason for floating idle speed is throttle play. How does it manifest itself and how to diagnose it. Below is a screenshot of the SMS diagnostic program. The parameters were taken from a VAZ 2115 car with an M74 engine management system.

Here it is worth paying attention to the high air flow, relative filling and injection time. At the same time, the opening angle of the throttle valve is very small and the controller, trying to stabilize the idle speed, drives the ignition timing into the minus. This happens because the actual angle of the throttle valve does not correspond to the angle calculated by the control unit due to backlash. Moreover, if you initialize the throttle, then the engine may work normally for some time, but after some time or after a restart, the situation with the speed floating repeats. It is worth mentioning here that if the throttle is dirty, the parameters will also differ from the norm, with the only difference being that the valve opening angle becomes larger than usual. As an example, here is a screenshot with normal parameters:

How to eliminate throttle play. To do this, the throttle assembly must be disassembled. From the gearbox side, unscrew 4 screws (Torx 15) securing the cover.

Here we see the gears of the transmission mechanism.

The middle gear is simply removed.

On the other side there are throttle position sensors and an electrical connector. They are fastened with very rare pentagonal Torx screws. Photo below:

We're filming. The electric motor in the housing and the damper axis are visible.

Next, you need to use a press or vice to squeeze out the throttle axis from the TPS side towards the gears.

What are the signs of a dirty throttle body?

Washing and cleaning both the throttle valve and the entire assembly is not a difficult task. But nevertheless, many car owners do not know how to clean correctly, why to clean and when to clean, and having only a little experience in car maintenance, they are afraid to climb under the hood and do anything with their own hands.

In this article we will analyze the entire procedure for flushing the throttle assembly, and I hope that the typical car owner will no longer have all the questions about performing this operation.

Signs of a dirty throttle body

The most common symptoms associated with a dirty damper:

poor or unstable engine starting “every time”;
unstable idling, speed fluctuates;
when driving at low speeds, the car twitches;
Difficulties at idle, engine stalls at idle.

All of these signs indicate a dirty throttle body. But don’t rush to draw conclusions and rush to clean the unit, because... the same signs may indicate a malfunction of some sensors: IAC, TPS - these sensors are located on the throttle assembly and may be faulty. In particular, high-quality flushing of the throttle assembly can cure these sensors, but not a fact (by following the link, you can check, clean, replace the IAC, check the TPS, repair and replace it). Also, a faulty mass air flow sensor has similar symptoms. It is advisable to clean the throttle assembly at intervals of 30 thousand km.

When to clean the damper

Dust, dirt, and soot from the crankcase settle on the body from the inside and outside. The unit becomes contaminated, and along with this, characteristic symptoms of malfunctions appear.

Jerking when driving at low speed (the accelerator pedal does not move).
The crankshaft speed is either too high or varies over a wide range.
Unstable engine starting.
The engine stalls immediately after starting.

Similar symptoms are observed in case of malfunctions of the crankshaft sensors, throttle position sensors, and idle speed control. Therefore, before starting cleaning, it is advisable to perform diagnostics, at least with a simple scanner, in order to identify possible breakdowns.

Flushing the throttle valve

In this article we will describe two types of throttle valve cleaning:

These two types differ in the degree of difficulty of cleaning and, accordingly, in quality.

Superficial cleaning

The essence of this cleaning is that we will not completely disassemble the entire throttle assembly, but will go over the valve with a cloth and remove surface dirt.

For work we will need:

Any cleaning agent: carburetor cleaner, alcohol, thinner, gasoline, wd-40. They differ only in the degree of “removability” of dirt and that’s all.
Rag.
Brush.

First of all, we remove the air filter bell from the throttle valve, take our cleaning agent and spray it inside the throttle valve. We begin to clean the surface with a rag and brush. Also, do not forget to open the damper itself and clean it from the back side. This completes our process; we reinstall the air filter pipe and that’s it. But with this cleaning method, we will not be able to completely clean all the insides of the throttle valve, we will not be able to blow through all the holes and channels, so it is better to use a complete cleaning.

Complete throttle body cleaning

To completely clean the damper, in addition to a rag and cleaning agent, we will need:

Flathead, Phillips screwdriver.
Throttle valve gasket (for 1.5L) and receiver O-ring (for 1.6L) (approximate cost 20-50 rubles).
Cotton buds.
Socket wrench set to "13".
2 M13 bolts.

In this case, we need to completely remove the throttle assembly and clean it from all sides.

In order to remove the unit, disconnect the air filter corrugation and remove the ohm pipes. liquid (in the Murzilka it is recommended to drain the liquid before starting work, but do not waste time on this by removing the pipes from the throttle - just plug them with bolts so that the liquid does not spill out), remove the adsorber pipe.
Disconnect the throttle assembly mount, remove the throttle cable, and remove the throttle assembly. If you require a more detailed description of removing the throttle assembly, then read the article: How to remove the throttle assembly, valve?
Having removed the throttle valve, we disconnect and clean the IAC sensors (how to clean IAC), TPS and completely wash the damper on all sides with a cleaner, be sure to blow out all the holes with compressed air.
Then we install everything back, not forgetting to put in a new gasket.

Cleaning the throttle body

In general, I suffered with this problem for a long time. But the problem is that when you start to change gears, the car starts to howl, and the revs drop poorly.

— someone said that the IAC is faulty ( Idle Air Controller)

) - others said that the damper does not close completely

like this, but I'm fine

— there was also the option that the cable ( gas)

)ъ - and the last option was that the throttle was dirty

Well, I decided I should try it too, if everyone speaks so positively about it.

I went to the nearest auto store and bought the spare parts needed for this task:

— carburetor cleaner ( for some reason many drivers use a carburetor rather than an injector

)

- throttle gasket

- air filter, SCT SB201, as they have good reviews of it

We arrived at the garage and started working on the car.

1. First, open the hood and prepare the tools:

2. Turn on the ignition and unscrew the terminal from the battery

3. Use a Phillips screwdriver to loosen the clamp

4. Remove the air hose from the mass air flow sensor housing.

5. Loosen the clamp securing the air hose to the throttle pipe

6. Loosen the clamp securing the crankcase ventilation hose to the cylinder head cover pipe.

7. Remove the air hose assembly with the crankcase ventilation hose

8. Use a Phillips screwdriver to loosen the fastening clamp and remove the crankcase ventilation hose from the throttle assembly fitting

9. Loosen the fastening clamps and remove the coolant supply and discharge hoses

10. Using a “13” socket, unscrew the two nuts securing the throttle assembly to the receiver

11. Remove the throttle assembly from the studs and the sealing gasket

12. Unscrew the IAC (Idle Speed Control

) and another sensor where the foam ring is located.

13. Get the carburetor cleaner

and begin to carefully wash all the grooves and holes

14. Next I changed ( the air filter

)

there is a difference

15. And we begin to assemble the throttle assembly and air filter in reverse order.

Result : as a result of the work done, the car disappeared ( but a little of that problem of high revs still remains, maybe it’s because I’m already used to

)), but I still think everyone should do this.

Signs of damper contamination

The car itself may tell you that it’s time to start cleaning the damper. To do this, you need to listen to the engine. A few main signs:

when the e-gas pedal is released, the engine speed decreases jerkily;
difficulty starting in winter;
When starting, a strong smell of gasoline may be felt in the garage;
at the beginning of operation, the engine stalls, since not all cylinders start at the same time;
the car jerks during acceleration;
it is impossible to brake with the engine and coast;
when switching to low speeds, the car may stall;
When driving at low speeds, shocks are felt.

The appearance of these symptoms is due to the fact that insufficient air enters the engine and the fuel mixture becomes poorly enriched. Due to the design features, combustion product residues accumulate on the damper - unprocessed fuel, soot, drops of oil. Dust and small particles of sand are added to them from the air supply system, which makes the mass very thick. The intervals between preventive cleanings are shortened by poor quality fuel and engine oil.

When the layer of dirt becomes thicker, the damper cannot move smoothly, and its opening angle becomes smaller. Because of this, the amount of air entering the cylinders is reduced and engine power is reduced.