How to flush the throttle body on. Cleaning the throttle body - a trifle or a necessity? Throttle valve, important operating features

The throttle valve or throttle is a node that serves to regulate the amount of air entering the cylinders. The degree of depression on the accelerator pedal will determine how much the specified damper opens. On modern injection cars, it determines the position of the throttle valve and the volume of air entering the power unit using sensors, after which it sends a control signal to / to supply the required amount of fuel, which will be proportional to the amount of incoming air.

Cleaning the throttle valve on a gasoline engine, as well as cleaning the throttle valve, is a necessary procedure, since contamination of this assembly leads to unstable engine operation. With a dirty throttle, the power unit may idle unevenly, the revolutions float, reactions to pressing the gas pedal may be slow, fuel consumption increases, acceleration dips occur, etc. In our article, we will talk about what cleaning the throttle body itself involves, how to properly adjust the throttle body (throttle setting, learning, adaptation), as well as what kind of throttle cleaning fluid to use.

Read in this article

Throttle valve dirty: causes

During the operation of the car, throttle contamination is inevitable. At the same time, on a serviceable internal combustion engine, even without regular cleaning, dirt, which leads to certain problems, occurs by 25-40 thousand km. run. The process can be accelerated for the following reasons:

Use of poor quality air filters or loss of airtightness during . For example, it is enough that a crack appears in the air filter housing or defects in the air supply pipe occur.
Another reason for accelerated throttle contamination is the forced crankcase ventilation system. Some car models with this system are designed so that gases from the crankcase, together with particles of engine oil, are not supplied to the intake manifold, but to the pipe through which air is supplied. The indicated pipe is located just before the throttle. A certain amount of oil is retained by the oil trap, while residues accumulate on the damper.

As a result, due to adhering oil and dust, the damper does not close well, the device may wedge. That is why it is recommended to clean the damper for preventive purposes every 10 thousand km, that is, during a scheduled oil and filter change.

Throttle Cleaner

In order to clean the throttle body, a carburetor cleaner (called a "carbicleaner") is perfect. These compositions allow you to effectively wash dirt and deposits in just a few minutes. Throttle valve cleaning is preferable with removal, which allows you to wash deposits, after which they will not end up in the engine cylinders. After applying the cleaner, it is necessary to use a soft brush or brush, which carefully removes the remaining dirt, then the throttle assembly is additionally blown with air from the compressor.

RPM fluctuates after throttle body cleaning

So, it would seem, the whole procedure is over. The damper was cleaned with a cleaner, the air filter was replaced with a new one, the sensors were connected back, that is, everything was assembled and tightened. Now you can proceed to start the engine. If the engine starts after cleaning the throttle and continues to work normally, then the procedure can be considered successful.

It should be added that this is not always the case. Many are faced with the fact that after cleaning the throttle, high engine speeds are kept constantly and do not fall. Also, many drivers notice that after cleaning the throttle valve, fuel consumption has increased. The probable cause may be a mistake in the connection of any sensor during reassembly, but this rarely happens.

Most often, after cleaning, the throttle also needs to be additionally calibrated and adjusted, which not everyone knows about or does it wrong. In other words, high idle speeds after cleaning the throttle are a clear example and at the same time the answer to the common question whether it is necessary to train the throttle after cleaning this assembly. Let's figure it out.

Let's start with the fact that in some cases a clean throttle valve really needs to be adapted (trained). Typically, throttle valve adaptation is more often necessary when the electronic throttle valve has been cleaned before. There are fewer problems with a mechanical damper, but they also exist. In systems with an electronic throttle, the computer independently sets the damper position, in mechanical systems, the idle speed controller is set. To put it simply, after removing the layer of dirt, the position of the cleaned damper changes, but the ECU does not know about it and continues to supply fuel in accordance with the previous parameters before cleaning. To solve the problem, it is necessary to set the idle speed using diagnostic equipment, since it is possible to reset the previous parameters.

You can also try to teach the throttle manually. The easiest way to learn without diagnostic equipment or a scanner for adaptation is to unscrew the negative terminal from a few seconds to 10 minutes (depending on the make and model of car). This allows you to reset the settings, that is, the existing adaptation is reset and a return to the factory settings is performed. After connecting the terminal to the battery and restarting the internal combustion engine, the idle speed should stabilize.

Note that this method works on a limited number of vehicles. In such a case, you can use another opportunity to train the throttle assembly without a computer. This method is suitable for a number of vehicles from different manufacturers. Consider such an adaptation on the example of the Japanese car brand Nissan.

First, the engine must be warmed up to operating temperature, after which the engine should be turned off.
Next, you need to wait 5-10 seconds, then turn on the ignition for 3 seconds.
Now you need to press the gas pedal all the way and immediately release it. This is done 5 times, you need to do it in 5 seconds (one click per second). The interval should be timed with a stopwatch so as not to stray.
After the last press, wait 7 seconds, after which the gas pedal is again pressed “to the floor” and held in this position until the “check” starts blinking on the dashboard, and then this light lights up constantly.
After the moment when the check code began to burn constantly, you need to wait another 3 seconds. Now the gas pedal can be released.
Next, the engine must be started, idle should return to normal.

In addition, during this adaptation of the throttle, it is important to accurately maintain the time at each stage, as well as fit into all time periods. In this case, we can talk about the successful implementation of training. It is also recommended to clarify the features and the possibility of manual adaptation for a specific car model.

Check engine light came on after cleaning throttle body

On some vehicles, the damper has a coating, as it is covered with a special molybdenum paint applied around the perimeter of the damper. If the damper is cleaned too vigorously, then there is a risk of removing this coating. Without it, the normal operation of the throttle is disrupted. Paint can be purchased separately, after which the coating should be restored. Another nuance may be the natural wear of the throttle valve, that is, the surface wears out on its own, taking into account that opening and closing occurs. At the ends, the accumulated dirt grinds off the damper, after which a gap appears. Before cleaning, the gap is clogged with deposits, but after they are removed, the development immediately makes itself felt.

If the gap is large, then the operation of the idle control control systems fails. Normally, a small amount of air flows through the damper, which is in the closed position. Air also passes in a minimum amount through a small gap that exists between the ends of the “patch” and the walls of the throttle assembly. Such air is taken into account by the ECU during the XX adjustment, the XX regulator sets the desired step and the speed is still maintained within the specified limits.

This is a simplified diagram of the operation of the idle speed controller, which closes more or more opens the channel for supplying air at idle and maintaining the internal combustion engine at a given speed. Now let's imagine that too much air is flowing through the increased gap between the damper and the walls. It is quite obvious that the idle speed will be increased. The ECU, in turn, will, through the XX regulator, attempt to keep the speed within the specified limits. In other words, the IAC will be signaled, causing the number of steps to be reduced to maintain, for example, 800 rpm.

In other words, IAC will conditionally reduce the number of steps from 25 to 5, after which the speed will become normal. Such an adjustment will be possible as long as there is a margin for the number of controller steps. If the regulator completely blocks the channel, that is, it sets the steps to zero, and the revolutions will still be at around 1000 rpm, then the ECU will detect a throttle assembly error and the “check” will light up on the dashboard. In fact, the control unit will detect an error in the idle speed control system. In this case, not only the regulator, but also the damper itself may be faulty, which leads to the need to replace the damper or the entire throttle assembly at once.

Summing up

As can be seen from the foregoing, cleaning the throttle, injectors, monitoring the condition of filters, spark plugs and other similar actions are on the list of basic operations that it is desirable to regularly perform at each MOT. As for cleaning the throttle assembly, this procedure is carried out at most every 50 thousand km. (recommended every 25-40 thousand), done carefully and with the help of special equipment, since the damper may have a special coating for smooth operation of the unit.

You should also be prepared for the fact that additional equipment will be required for subsequent adaptation. If it became noticeable that after cleaning the throttle valve, fuel consumption increased, then it is necessary to pay attention to the operation of the XX system, check the throttle assembly and the idle speed controller. Please note that if you are not confident in your abilities, and also do not have certain skills and appropriate equipment, then it is better to contact specialists.

Finally, we add that if a robotic gearbox is installed on the car, then it is optimal to carry out cleaning and subsequent adaptation of the throttle valve in parallel with the training of the “robot”. These actions together give a more tangible result, the engine responds better to the gas pedal, and the transmission runs softer, delays, jerks and shocks when shifting gears are minimized.

2 Where does the pollution come from?

It seems that since the air from here enters directly into the combustion chamber, everything should be sterile clean. However, this is not the case. The cause of deposits that require cleaning are crankcase gases carrying oil dust. They get here by accident and not completely, but still seep through the valve cover from the ventilation system of these same crankcase gases. They consist of the remnants of the unburned fuel mixture and the products of its combustion, there are also oil residues that are taken with them by the exhaust gases.

It is the oil component that settles on the damper, for this reason it requires periodic cleaning. As a rule, this is done quite easily, it is enough just to choose the right tool. The following behavior can be considered signs of pollution:

it is less and less possible to start the engine without failures;
at idle speed is uneven;
at the beginning of acceleration (below 15 km / h), the car twitches from time to time;
failure occurs when switching from idle.

3 What kind of throttle cleaner do you use?

Among the people there are many craftsmen who adapt to clean with rather exotic compounds. But now there is no need to be smart, because cleaning the throttle does not need to be repeated every week. This is unlikely to be needed more often than after 50-60 thousand km. Therefore, it is quite possible to spend money on a special tool, and there will be no harmful consequences after its use, if everything is done correctly. Such a cleaner contains a solvent and various additives, which, of course, no manufacturer will agree to announce.

The flagship of autochemistry, under the brand name of which you can find almost any necessary liquid for your car, is, of course, Liqui Moly. Although there are plenty of other tools on sale too. If, nevertheless, there was no target cleaner in the store, a carburetor spray is quite suitable. Someone manages to use the liquid WD-40 or even acetone. It may have a similar effect in dissolving oil deposits, but the likelihood of damage to some components in the throttle mechanism increases.

4 Cleaning features

There are several ways to remove dirt from the throttle valve. For example, lazy people prefer to blow the product directly into the mechanism while the engine is running. Of course, the option is not very successful and not entirely careful, it is not advisable to drag such a composition inside. Dismantling is more difficult to do, it is important to remember the location of all parts and fasteners, but then you have the opportunity to control your actions and the degree of removal of contaminants. Why is it important?

Autochemistry for cleaning the damper is quite aggressive, it can dissolve rubber and plastic elements, of which there are enough. They are just removed before the operation. Also, you can not spray the liquid mindlessly, but apply it exactly to the right places, thereby not washing off the lubricant from the rotary mechanism or at the throttle inlet. By removing dissolved contaminants with a cloth, you can rub more somewhere or even reapply the product if the clog was very old and cannot be washed off the first time.

The throttle valve itself is one of the most reliable engine components and its replacement is an extremely rare event. Without outside physical intervention, it cannot fail, however, from time to time it requires the attention of the car owner. If the engine suddenly began to run unevenly, the idle speed began to float, the car responds worse to the gas pedal, this indicates that the throttle valve needs to be cleaned.

During the operation of the car, oil deposits form inside the throttle assembly, including on the damper and idle speed control rod, which eventually begin to interfere with the free movement of the damper. She begins to wedge, because of this, the unpleasant symptoms described above occur. To eliminate them, the throttle assembly must be removed and washed. See below for how to clean it.

Why does the throttle body get dirty?

There are a number of reasons why the throttle body becomes contaminated with all sorts of deposits. Chief among them is oil dust, which penetrates through the crankcase ventilation pipe from under the valve cover. The oil in the throttle body settles on all internal surfaces, attracting dirt.

It is impossible to prevent or stop this process. The removal of crankcase gases is necessary, because otherwise the oil will lose its lubricating properties very quickly, and the extreme pressure will quickly increase in the lubrication system, and the oil will be squeezed out through all seals (gaskets, oil seals, dipstick). In all engines, crankcase gases are not discharged into the environment, but into the air system to improve the environmental friendliness of the engines.

By themselves, blow-by gases could pass through the throttle valve with little or no damage to the engine (except for some deterioration in the quality of the working mixture), but their constant companion is oil mist.

Oil attracts the dirty component of gases and, settling on the surfaces of the throttle assembly, forms a coating that needs to be cleaned.

Signs that a cleaning is needed

As dirt accumulates, the motor begins to give signals that the throttle valve needs to be cleaned. Signs of a contaminated throttle assembly are as follows:

the engine starts uncertainly, sometimes not on the first try;
at idle, the engine is unstable, the speed is floating;
when driving at low speed (up to 15 km / h), the car twitches;
when the clutch is depressed to change gear, while driving, the speed either drops very slowly, or, conversely, too sharply, while the engine may stall;
there is a dip in the region of 1000 rpm.

Removing and cleaning the throttle valve

Throttle valve cleaning is carried out after its dismantling. Removal begins with disconnecting the corrugation of the air duct and disconnecting the wires from the idle speed controller, throttle position sensor. Removal in itself is not difficult. It is only important that the motor is cold, otherwise you risk getting burned.

The next step is to disconnect the hoses connected to the throttle. Disconnected hoses can be plugged with spark plugs so that nothing spills out of them (there is probably an old set in the garage for this purpose). Finally, you need to remove the cable from the mechanical drive.

After the throttle valve is freed from all the “tails”, you can proceed to its dismantling and subsequent cleaning. It is fastened on different machines with two or four bolts or nuts. Then, from the throttle assembly, you need to remove the throttle position sensor and the idle speed controller, after which you can start cleaning.

flushing

Flushing is carried out using a special aerosol for cleaning carburetors. This composition is very aggressive, so you need to clean it carefully. Whenever possible, wear gloves and goggles. The aerosol is sprayed onto all surfaces and into all channels.

If the pollution is strong, you will have to clean it more than once. Repeat the treatment after the entire throttle assembly has dried. After all the deposits have been washed off, you need to wipe all the parts with a clean rag, and if necessary, rinse again.

Particular attention should be paid to the channel inside which the IAC needle moves and the crankcase ventilation channel, which can be heavily clogged with deposits. The ventilation channel sometimes has to be cleaned with a steel spoke, after which it must be cleaned with an aerosol.

Also, thorough cleaning is required for the idle speed regulator, the needle of which can become so dirty that it starts to wedge. However, before flushing, it is desirable to assess the overall condition of the IAC. If the needle has a lot of play or wear, it is better to replace the regulator with a new one.

Before you install the throttle assembly back, you need to pay attention to the condition of the gasket. If it is not damaged, it is quite possible to reuse it, but if it is swung a lot or torn, it needs to be replaced. The throttle assembly is mounted in the reverse order. After assembly, you may need to adjust the throttle, or rather, adjust the tension of the cable, which could loosen or stretch.

When Cleaning Doesn't Help

It often happens that after cleaning the throttle assembly, the engine still runs unevenly, idle speed floats from 600 to 1500 rpm. This clearly indicates that there is a problem with the node. The cause may be a malfunction of the throttle position sensor or IAC.

The following symptoms indicate the failure of the position sensor:

difficult starting of the motor;
increased or floating idle speed;
increased fuel consumption;
power drops during acceleration.

Repair of a faulty throttle position sensor is impractical, it is preferable to replace it. You can check the health of the position sensor either with a multimeter, or remove it and replace it with a known working one.

Symptoms that indicate a malfunction of the idle speed controller are as follows:

increased fuel consumption;
when the gas pedal is released in neutral, the speed drops very slowly, sometimes with a delay of up to ten or more seconds, or the drop occurs too sharply, up to the engine stopping.

You can try to remove and rinse the pxx again, but if cleaning did not help, then the malfunction has become fatal and replacement is required.

" you will learn, how to clean the damper, do-it-yourself throttle, naturally. The work is not dusty and does not require special skills and knowledge. Moreover, on our website we have already talked about this, last time.

It should be noted right away that there are no cardinal differences in the performance of this work on different VAZ models, the principle is the same - we remove the throttle assembly, take a special liquid and spray it onto the damper. In rare cases, you have to make more effort and rub the throttle with cotton swabs, or even a toothbrush.

As always, before proceeding, a few words about what a throttle valve (DZ) is, why it gets dirty and how to understand what is needed throttle body cleaning. Go...

What is a throttle valve?

throttle valve (DZ) - an integral part of the fuel system of a gasoline engine. The main task of the DZ is the dosage of the air supply that enters the cylinders to form a combustible mixture. The throttle is located after the air filter and before the intake manifold. Simply put, DZ 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 is formed in the system. Each time you press on the gas pedal, the damper opens or closes, since the remote control is connected to the gas cable.

In what cases is it necessary to clean the throttle body?

Signs of a dirty throttle, as well as the need to clean the throttle:

Bad engine start, ;
Jerks while driving at low and medium speeds.

Causes of throttle body contamination:

Air. Although it is filtered, it still contains dust.
Oiling and crankcase gases. These two substances form an oily coating on the DZ, which prevents the normal operation of the throttle assembly. The damper starts to open and close poorly (bad response to the gas pedal).

How to flush the throttle valve VAZ 2114-2115

There are two types of cleaning - with and without removal. First way provides for the following points:

1. Disconnect the air filter corrugation, remove the pipes, as well as the adsorber pipe. The coolant pipes must be bolted or bent and clamped so that the coolant does not spill out.

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

4. Next, using WD-40 or a special carburetor cleaning fluid (for example, ABRO), we clean the DZ. This is done simply, it is necessary to apply the composition to the damper, 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, repeat the cleaning, you can use cotton swabs or a toothbrush.

Attention! Never use sharp metal objects!

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

Second way provides for disconnecting the air corrugations and cleaning the throttle valve right on the spot. The principle is the same: the solution is sprayed from one side and the other side of the DZ (for this, you can turn the shutter by hand at the place where the cable is attached). I did not try the second method, because in my opinion it does not make it possible to clean the throttle valve in full, so I cannot advise this method or talk about the results of such cleaning.

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

One of the most indispensable parts of every car is the throttle valve design. Despite its tiny size and invisibility, it is forced to fulfill a very important purpose by regulating the air supply to the intake manifold.

There are options with a mechanical drive or the presence of an electric motor, which is responsible for the timely opening and closing. The damper position is controlled by a sensor capable of transmitting the collected data to the electronic control unit. The received information is processed by the appropriate microprocessor, after which the operation of the power plant is adjusted.

With prolonged use of the vehicle in our climatic conditions, the risk of damage to such a tiny but very important part becomes maximum. In order to prevent unforeseen phenomena, it is important to regularly clean the element from carbon deposits and other defects. If you do not respond to their appearance, this can cause a loss of engine power, poor ignition, and some other problems.

Malfunctions in the operation of the throttle structure are accompanied by the appearance of some symptoms, although they are not always caused by the formation of plaque or deposits. Often the problem is due to the usual damage to the throttle sensor, malfunctions of the drive system and other breakdowns. Among the typical signs of pollution, it is important to highlight the following:

When carefully checking the throttle assembly for faults, pay attention to the condition of the damper, even if it remains fully operational. Timely cleaning of the assembly can protect you from additional difficulties, maximizing the life of the mechanism.

Causes of pollution

The appearance of soot in a node is an inevitable process. This problem is due to several factors, including:

If a lot of such deposits form in the mechanism, most likely the device ceases to cope with its basic duties and begins to “jump” a lot. Further pollution causes a decrease in the estimated volume that should fall on the computer. In addition, carbon deposits can cause incomplete closing of the damper and the passage of excess air.

Important Tip: when removing the assembly, do not forget to clean the junction with the intake manifold, where you will have to place a new gasket. If the assembly is completely dismantled, start the cleaning procedure.

In this case, you need to use special throttle cleaner. If you do not have extensive financial opportunities, try to opt for the Carbcleaner tool, which is capable of effectively cleaning carbon deposits.

Before applying chemical solutions, make sure that all rubber elements on the throttle assembly are removed.

Basic cleaning rules

After thorough cleaning and drying of the throttle assembly, you can start assembling the engine in the reverse order.

If the motor still malfunctions after reassembly, the problem may be due to improper adjustment of the assembly. It is performed taking into account the type of control.

Throttle control systems

If we talk about models with mechanical damper control, most likely the motorist needs to change the configuration of the idle speed controller. It is carried out in the following way:

Having dealt with the setting of the mechanical control system for the throttle assembly, it is necessary to provide the engine with 150–200 kilometers of work, which will normalize idling.

As for electric models, they are configured as follows:

When performing this action, follow the established guidelines and avoid irreparable errors.

Cleaner Liqui Moly

The product is based on a special active solvent that performs a comprehensive cleaning of typical dirt, deposits and deposits that accumulate at the intake and throttle valves in cars with gasoline units. It can dissolve and remove all deposits such as oil, resin, glue and others.

In addition, it provides reliable cleaning of injectors and internal parts, ensuring maximum functionality and mobility of parts. At the same time, fuel consumption indicators are reduced. The option is only suitable for gasoline units.

The product is sold in an aerosol package based on a mixture of solvents. It is applied to the surface, resulting in the dissolution, softening and cleaning of the throttle assembly from deposits. Among the advantages of such a substance:

quick and productive cleaning of the node;
no mandatory need to dismantle the damper;
simplicity and economy of operation;
compatibility with catalysts;
the presence of a probe with a sprayer in the kit;

With the timely use of Liqui Moly, you will be able to effectively get rid of all kinds of defects on the dampers.

WD-40

On the shelves of automotive stores you can find a lot of blue jars with the inscription WD-40. Unfortunately, not all motorists know what is contained inside such containers.

But they are a highly effective tool for precise machining of the most inaccessible places, such as a hub nut that has succumbed to rust and now cannot be unscrewed. Along with the jar, a red thin tube is included, which is necessary for a more thorough cleaning of the structure.

As for the history of matter, it goes back to 1958. The first version of the tool was introduced in California. Among the main purposes were:

protective functions to protect the structure from rust;
moisture repellency;
breaking rust formations to loosen rusted nuts and bolts;

The true composition of VD-40 is not a trade secret, so any information of interest can be found on the Web. It is known that it comprises:

The main area of application is automotive service centers where it is necessary to unwind rusted connections, especially when cleaning throttle bodies. With the help of such a substance, you can quickly and efficiently unscrew almost any nut. Probably every self-respecting car owner has a jar of such a tool in his tool kit or in the trunk.