Errors when cleaning the throttle assembly. How to clean the throttle position sensor

18.06.2019

All owners Vehicle can be roughly divided into two categories. The first group includes motorists who like not only to drive in a car, but also do not deny themselves the pleasure, if necessary, to carry out minor repair and maintenance work on their own. The second category includes car owners who do not like to look under the hood of the car and prefer to use the services of specialized car services. The information provided in this article will be of interest to the first category of motorists, because further we will talk about how to clean the throttle without the services of service station specialists.

Throttle assembly

On the one side throttle valve there is an air filter, on the other - an intake manifold. When you press the gas pedal, the throttle valve opens slightly, allowing air flow freely enter the collector. The more the accelerator pedal is depressed, the more the damper opens and the more air is supplied to the intake manifold. Next, the air is mixed with the fuel mixture and fed into the engine. Volume air-fuel mixture, which enters the internal combustion engine, affects the number of engine revolutions. Obviously, this part of the car performs an important task, so periodic cleaning of the throttle is mandatory procedure affecting smooth operation motor.

In the process of driving from the internal combustion engine, oil particles and crankcase gases inevitably get on the inner and outer walls of the throttle valve. The air filter cannot trap all the dust passing through it, as a result of which some of it also settles on the throttle assembly. This will inevitably cause deposits and oil stains to form inside the throttle body and on its surface, which in turn adversely affects the normal functioning of this structural element inlet system.

The main signs, pollution:

unstable start of the internal combustion engine;
failures in the engine during idling;
the appearance of small jerks of the vehicle while driving at low speed.

Throttle cleaning, like most other work carried out in engine compartment car, it is recommended to carry out with a completely cooled engine.

The vehicle must be on a level surface with the parking brake or at low gear, there must be wheel chocks under the wheels.

There are two ways to clean the throttle yourself in a garage.

Cleaning without dismantling

Surface cleaning is a simple but ineffective method of dealing with dirt that accumulates on the throttle assembly. This method does not require the dismantling of the throttle valve, because it is assumed that deposits and oil stains will be removed exclusively from its surface.

To perform surface cleaning, you must have:

any active solvent cleaner,
rag.

First of all, the throttle body is disconnected from the corrugation air filter. Then you can proceed directly to the process of removing oil stains and deposits. The cleaning agent is applied to the surface accessible for cleaning. throttle assembly, after which the dirt is cleaned with a rag. As you can see, the main advantage of this method is the simplicity and speed of its execution.

A significant disadvantage is that it is not possible to clean the throttle valve completely. Also, it will not be possible to free the holes and channels of the assembly from the dirt accumulated in them.

Complete cleaning is a more time-consuming process that allows you to most effectively remove dirt particles and oil stains from the inner and outer surfaces of the throttle assembly.

To do this job you need the following materials and tools:

cleaner,
rags,
set of flat and Phillips screwdrivers,
original throttle body gasket,
socket wrench (opening size 13 mm),
can of compressed air.

To thoroughly clean the throttle assembly, it must be completely removed. The throttle body, as in the previous case, must be disconnected from the air filter corrugations. Then the gas cable is removed, which opens and closes the throttle, and the pipes that conduct the coolant are dismantled (it should be drained into a previously prepared container). After that, the old gasket of the throttle assembly body is removed (a new one is installed instead of it during assembly), and the bolts securing the damper are unscrewed. Sometimes remnants of an old gasket can be found on the intake manifold. In this case, they must be removed.

After removing the throttle assembly, the idle speed sensor and throttle position sensor are disconnected and cleaned. Using a can of compressed air, all channels and openings are blown. A cleaning agent is applied directly to the throttle valve, which after 15-20 minutes must be removed together with oil stains and deposits with a rag. Assembly of the node is carried out strictly in the reverse order.

Get more detailed information O self cleaning throttle valve can be seen by watching the video.

Practice shows that during the procedure, you should not apply a cleaning agent to the rubber and plastic parts of the assembly, because. this can cause their partial or complete destruction.

Washing agent

Throttle assembly fastener

Knot removed

Visible soot on the gasket

Flushing damper

Why you need to clean the throttle: the importance of the procedure

throttle valve- This is a damper that is directly connected to the gas pedal of the car. Throttles and gas pedals modern cars electronic.

The main elements of the throttle

How is the engine speed controlled by the driver? By pressing on the gas, he opens the throttle, increasing the diameter of the space through which the engine is supplied with air. The more air enters the engine, the more the engine ECU (computer) supplies fuel, while maintaining the required air / gasoline ratio. A large mass of air-fuel mixture leads to an instant increase in speed (and power, respectively).

Checking operation after cleaning

So, the throttle valve is a kind of "breathing organ" of the engine. Together with the air environment it gets dust that managed to bypass the air filter.

Also in the engine there is such a system as a recirculation system crankcase gases. Gases accumulate in the crankcase, consisting of oil dust, exhaust gases, and fuel that has not had time to burn in the cylinders.

In accordance with modern environmental requirements, the designers decided to send these gases back to the cylinders in order to burn them out. The gases pass through the oil separator, but a small percentage of the oil still remains in them. Their path to the cylinders just lies through the throttle valve.

That's where it happens mixing oil dust with ordinary dust. This black, sticky mass settles in the working space of the throttle, through which air enters the engine.

The resulting layer affects the diameter, and hence the throughput throttle. This affects the operation of the engine, its reaction to a sharp pressing of the gas pedal. In addition, the oily mixture can get into the KXX, which adversely affects the idle speed. Therefore, it is necessary to clean the throttle from unwanted formations inside it.

Symptoms that may occur with a clogged throttle

With a clogged throttle valve, there is some sluggish response to the gas pedal. An engine with a clean throttle responds to pressing the accelerator much more lively.
Dirt buildup in the throttle restricts airflow and can cause unsmooth operation of the motor at idle, revolutions "float".
May be observed car jerking at low rpm and speed
At very high degree contamination, unauthorized shutdowns of the engine are possible, i.e. car stalls .
Fuel consumption. The ECU (computer) of the engine, recognizing too little air flow, increases idling, thereby increasing fuel consumption .

What to do so that the damper does not become dirty too quickly

Its condition will depend on the frequency of air filter replacement, use quality oil ICE, and serviceability of the oil separator of the crankcase gas recirculation system. In general, the cleaning procedure is not time-consuming and not expensive. Therefore, if the above symptoms occur, and simply, when passing through maintenance, it is recommended to check the condition of the throttle. The resource at the node itself is very high, but it is worth keeping an eye on it, as it performs quite important and delicate work.

Throttle valve contamination is a natural phenomenon for it. The throttle is cleaned, depending on the operating conditions, quite rarely, about once every 100 thousand kilometers. The degree of contamination is easy to determine by eye, and if the metal inside is covered with a black greasy layer of dirt, then it's time to clean it.

How to properly clean your throttle body

The throttle valve performs the function of regulating the air supply to the intake manifold in the engine. It can be performed with mechanical drive or an electric motor responsible for its timely opening and closing. The position of the throttle valve is monitored by a sensor that transmits information to the electronic unit management. Depending on the information received, the "brain" of the car corrects the operation of the engine.

When operating the vehicle in conditions Russian realities, the driver must take care of the timely cleaning of the throttle valve in order to prevent engine malfunctions. By not reacting to the formation of soot on the throttle, the driver risks losing engine power, running into problems with ignition and other troubles.

Problems in the operation of the throttle assembly have common symptoms, and they do not always occur due to the formation of deposits on the throttle valve. They can be caused by a failed throttle sensor, drive malfunctions and other malfunctions. Typical signs Throttle body contamination is as follows:

The engine does not run stably Idling- stalls, "float" speed;
Starting the engine is difficult;
At speeds below 20 km/h, the vehicle jerks when the accelerator pedal is pressed.

When checking the car's throttle assembly for the causes of a malfunction, you should pay attention to the condition of the throttle even if it is not the source of the problem. It is better to clean the mechanism in advance in order to delay the formation of deposits on it as much as possible, preventing the stable operation of the motor.

What Causes Throttle Fouling?

The formation of deposits in the throttle assembly is a process that cannot be prevented. Carbon deposits on the walls of the throttle valve and on the mechanism itself appear as a result of:

At education a large number deposits in the throttle mechanism, it will no longer perform its functions properly. Contaminants will cause turbulence in the air supply and reduce the expected volume that the ECU expects to receive. Also, carbon deposits on the throttle valve can lead to its incomplete closure and the passage of excess air.

It is believed that it is possible to clean the throttle without removing the assembly. A similar option is possible, but under conditions of extreme necessity, since it will not be possible to effectively remove carbon deposits with the help of such cleaning. This method allows you to remove deposits directly from the damper itself, while carbon deposits will remain on the walls and air channels, and soon the problem will manifest itself again.

Proper cleaning of the throttle valve begins with the dismantling of the assembly located between intake manifold and air filter. Depending on the vehicle, the assembly removal process may vary slightly, but on most vehicles it must be done in the following sequence:

Please note: When removing the throttle assembly, it is better to immediately clean the junction with the intake manifold, where a new gasket will need to be installed during assembly.

When the throttle assembly is dismantled, you can start cleaning. For this you need to purchase special remedy V car shop. A budget option for a cleaner is to use the Carbcleaner, which is designed to remove carbon deposits from a carburetor.

Attention: Before using chemicals, remove all rubber elements from the throttle assembly.

The basic rules for cleaning the throttle body are as follows:

After cleaning and complete drying of the throttle assembly, you can assemble the engine in the reverse order to removal.

Engine runs erratically after throttle body cleaning

On some vehicles, after cleaning the throttle body, it may be necessary to adjust the assembly. It is performed depending on the type of damper control.

Mechanical Throttle Control System

After cleaning the throttle assembly with a mechanical damper control system, it will be necessary to adjust the idle air control. It is performed according to the following standard algorithm:

After setting mechanical system throttle control, the motor may need to work 150-200 kilometers before idling normalizes.

Electric Throttle Control System

If the node uses electrical system throttle control, it will be adjusted in the following way:

Fulfill this procedure necessary in strict accordance with the given time.

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The injector throttle valve (DZ) is an indispensable component of the starting system for gasoline power units, which is designed to control the volume of air going into the engine. The need for cleaning it does not arise often, but it is worth knowing how to clean the injector throttle, because this can happen at any time on a used car.

Symptoms of DZ pollution

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As a rule, the following points are the symptoms of damper contamination:

the speed of the power plant fails and freezes, a complete stop of the engine is possible;
on the go, the motor is unstable, uneven;
in XX mode, revolutions float;
starting the engine for no reason is complicated.

One of the main signs of a dirty damper is bad traction cars on low revs. In addition, in the process of movement, the car twitches, especially when accelerating. Why is this happening?

How DZ is polluted

On the walls of the damper, a lot of all kinds of deposits are accumulated, which block the passage of air at small opening angles of the remote sensing. Obviously, this is not provided initially by the manufacturer. Engineers calculated the dynamics of the car, based on normal performance, on a clean DZ, as they say. For this reason, as soon as the damper becomes dirty, thrust failure begins. After proper cleaning, all processes are getting better, including fuel consumption.

DZ cleaning is required after washing the injector nozzles. In addition, the procedure is recommended for carrying out after the simultaneous appearance of 2-3 of the signs described above (maybe all together).

It will be useful to know that crankcase filtration (work) becomes the main source of pollution for remote sensing. On older engines, oil soot comes out of the crankcase. The steam settles and cools, turning into deposits.

Do I need to check the DZ often? Yes, if the car is used, definitely. This must be done every time power unit. If traces of soot are visible on the damper, as in the photo, it is urgent to start the throttle cleaning procedure.

If the DZ is combined with the IAC on the machine, then the sensor must also be thoroughly rinsed.

What is throttle adaptation or learning

DZ is allowed to be washed at home, although this largely depends on the model of car. For example, if a car with cable, mechanical pedal gas (standard), you can safely start cleaning. Not at all, if an electronic throttle is installed, the situation changes. May need adaptation.

Adaptation is reset either from the scanner or forcibly when it is simply pressed all the way and the accelerator pedal is lowered on a standing internal combustion engine. Adaptation is nothing more than a decrease in DOD (throttle opening angle). Often, after flushing the electronic throttle, the UOD opens more than necessary.

There are people who claim that after several tens of kilometers, the DZ automatically adapts, but this is not so. There were cases when, even after 200 km, floating speed remained on the car. They instantly disappeared after forced adaptation.

Here is how training (adaptation) is carried out:

the battery current is checked, which should be within 12.9 volts (with the motor standing);
the temperature of the antifreeze is checked (should be 70-99 °);
the gearbox should be well warmed up, and the steering wheel should be in the neutral position;
the car should be put on a flat area, all consumers should be turned off.

After that:

start the engine and count to five;
then quickly depress the gas pedal to the stop and release (repeat 5 times);
then count up to seven, and then press the accelerator pedal all the way and hold until the Check indicator flashes;
release the pedal after that, counting to three;
start the engine again if it stalls and count to twenty;
give gas and check that the speed automatically returns to standard in XX mode.

DIY cleaning

How do you clean the throttle body on the injector? The easiest way is with a carburetor cleaner. DZ opens forcibly, all the dirt is washed out from the inside with liquid from the carburetor. You can also clean it with a piece of soft cloth.

If the DZ is removed, then you can clean it with anything: a solvent, a brush. The main thing is not to use harsh abrasive compounds and sharp, rough objects.

When using carburetor cleaner in an aerosol can, it is recommended to wear goggles. Liquid under pressure, when washing, it scatters in all directions, and can get into the eyes.

It is not necessary to remove the DZ at all. Cleaning can be carried out on the machine, although rinsing with removal gives a much more effective result. In addition, cleaning without removal is not possible if the XX sensor is installed on the machine and it is connected to the damper.

In practice, it is quite enough to flush the DZ without removing it. There are also advantages in this procedure: there is no risk of tearing the sealing seal, which is located between the VC (collector) and the damper, you can clean it on a hot engine, there is no risk of scalding with hot antifreeze, etc.

If it is decided to clean the DZ with removal, one must not forget to bleed the air. To do this, the stopper of the tank with antifreeze is turned off.

Do not exert excessive force when cleaning the remote control, even if you have a soft rag or rag in your hands. The damper material is very sensitive, because it is coated with molybdenum for smoother air passage, in addition, the TPS (sensor) can be easily damaged.
Clean the damper only when it is really necessary.
It is better to use soft cloths for cleaning, but not brushes. Even with a soft pile, they can easily remove molybdenum along with plaque.

The function of regulating the air supply to the intake manifold of the power unit is performed by the DZ (throttle valve). Interacts:

With a mechanical drive;
With electric motor.

These mechanisms are responsible for the timely opening and closing of the damper. Throttle body cleaning is done infrequently. Work must be carried out only when there are clear signs failure of this node.

What can indicate increased soot

The driver must know by what signs it is possible to determine a malfunction or malfunction of the unit. These include:

Unstable, intermittent operation of the power unit. The car twitches at a speed of less than 20 km / h;
The idle speed “floats”, the power unit stalls;
It is possible that the engine speed is hanging;
Dips in engine speed to a complete stop;
The engine is difficult to start.

In this regard, the question arises of how to clean the throttle valve, what means to use. So, everything is in order. There are two ways to resolve the issue. Clean the throttle with your own hands or contact the service station specialists.

On a note. When carrying out cleaning, you should be aware that the process in question is recommended to be performed after the vehicle has run more than 100 thousand km.

In exceptional cases, the cleaning of the unit is carried out when the car runs after 30 thousand km. In order not to create confusion and vacillation in this matter, you should follow the manufacturer's recommendations.

Cleaning the node: stages and sequence of work

There are two cleaning options: without removing the unit and after dismantling. In the first case, the efficiency of carbon removal will be minimal. Cleaning without removal is carried out only in extreme cases, since carbon deposits are removed only from the damper, and deposits on the walls and air channels remain.

Complete cleaning gives more tangible effect. Work begins with the removal of the assembly, which is located between the intake manifold and engine air filter.

On cars different manufacturers work may differ, but not significantly. On most vehicles, this happens as follows:

the corrugation connects the damper with the air purification filter: it must be removed first;
Next, turn off the throttle position sensor and absolute pressure(if available and installed on the car);
then you need to squeeze out the load that fixes the accelerator pedal cable;
dismantle (disconnect) pipes from the coolant. At this stage, the work must be carried out very carefully. If the power unit has not completely cooled down, then hot drops technical fluid if it comes into contact with human skin, it can cause a burn, remember this;
We disconnect the ventilation hoses of the crankcase gases and the absorber;
After that, it is necessary to unscrew the fasteners of the throttle assembly and dismantle it.

After removing the mechanism, unscrew the idle speed regulator. Its washing and cleaning is highly desirable. To flush the entire assembly, you must use special tools.

Do not forget! Before flushing the assembly with chemicals, be sure to remove all rubber elements to prevent their deformation.

Flushing the throttle valve is possible using budget detergents("Carbakliner") and more efficient, but expensive. Read about it below.

Cleaning products

When completely dismantled, you can use a budget option, which was mentioned earlier. But most often flushing is carried out with a carburetor cleaner: carbicliner. It qualitatively removes dirt and deposits in a couple of minutes.

For work, you need a brush with soft bristles, or a brush, with which, after applying the chemical, you need to clean the knot.

Important! After carrying out cleaning measures, be sure to blow out the throttle valve. To do this, use a compressor.

But even after the “general cleaning” problems can arise. Don't be scared, it happens. It may be found that after cleaning the throttle body, the speed floats. This is a solvable issue.

It is necessary to check the correct connection of the sensors. There may have been an error during the build phase. After the cleaning procedure, you need to adjust and adjust the throttle. Not all drivers are aware of this. Or the setup process is not performed correctly.

If the setting is made with violations, then it is possible that the sinking and the power unit will work on increased speed constantly. This leads to an increase in fuel consumption.

The reasons are the same: incorrect adjustment and an error when connecting the sensors.

When the electronic throttle has been cleaned, it needs to be adapted. The fact is that after work, the position of the damper changes. And the electronic control unit (ECU) does not know about this, continues to issue fuel, according to previous indicators.

It is necessary to set new revolutions using diagnostic equipment, after resetting the old parameters.

Use chemicals to clear the entire node. Don't forget about remote sensing channels. Apply coolant (cleaning fluid) and let it soak in. This takes 5-10 minutes. Remove stubborn soot with a soft cloth.

throttle valve- This is a damper that is directly connected to the gas pedal of the car. Throttle valves and gas pedals on modern cars are electronic.

The main elements of the throttle

Why do you need to clean the throttle body?

Checking operation after cleaning

So, the throttle valve is a kind of "breathing organ" of the engine. Together with the air from the environment, dust gets into it, which managed to bypass the air filter.

Also in the engine there is such a system as a crankcase gas recirculation system. Gases accumulate in the crankcase, consisting of oil dust, exhaust gases, and fuel that has not had time to burn in the cylinders.

Settling dust

That's where it happens mixing oil dust with ordinary dust. This black, sticky mass settles in the working space of the throttle, through which air enters the engine.

The resulting layer affects the diameter, and hence the throttle capacity. This affects the operation of the engine, its reaction to a sharp pressing of the gas pedal. In addition, the oily mixture can get into the KXX, which adversely affects the idle speed. Therefore, it is necessary to clean the throttle from unwanted formations inside it.

Symptoms that may occur with a clogged throttle

With a clogged throttle valve, there is some sluggish response to the gas pedal . An engine with a clean throttle responds to pressing the accelerator much more lively.
Dirt buildup in the throttle restricts airflow and can cause unsmooth operation of the engine at idle, the revolutions “float”.
May be observed car jerking at low rpm and speed
With a very high degree of pollution, unauthorized engine stops are possible, i.e. car stalls .
Fuel consumption. The ECU (computer) of the engine, recognizing too little air flow, increases idling, thereby increasing fuel consumption .

What to do so that the damper does not become dirty too quickly

Its condition will depend on the frequency of replacing the air filter, the use of high-quality ICE oils, and serviceability of the oil separator of the crankcase gas recirculation system. In general, the cleaning procedure is not time-consuming and not expensive. Therefore, if the above symptoms occur, and simply, when passing through maintenance, it is recommended to check the condition of the throttle. The resource at the node itself is very high, but it is worth keeping an eye on it, as it performs quite important and delicate work.

Quick Throttle Way

Conclusion

Throttle valve in modern automobile gasoline engines is a device that, along with other systems, is responsible for adjusting the composition fuel-air mixture entering the cylinders for combustion. For different modes engine operation requires a strictly defined qualitative and quantitative composition combustible mixture and its violation can lead to precarious work engine in the appropriate modes, loss of power of the power plant and increased consumption fuel. That is why the full functional performance of the throttle valve is important, which can be impaired by contaminants during the operation of the car.

Why does the throttle body get dirty?
In addition to the fact that pollution in itself is a natural process for any operating mechanism, the pollution intensity of the throttle valve is increased by the crankcase ventilation and exhaust gas recirculation system, which, in accordance with environmental requirements, direct harmful substances for afterburning in fuel mixture. As a result of their work, a persistent coating of resinous deposits appears on the throttle.
How often should the throttle body be cleaned?
The throttle body should be cleaned as it gets dirty. On average, this can happen once every 30,000-50,000 km. You can determine its pollution by the following signs of a violation of the normal operation of the engine:

unstable operation of the engine at idle with a periodic sharp decrease in speed and their subsequent sharp increase (the so-called "failures");
jerks while driving at low speeds due to unstable operation of the idling system;
the tendency of the car to stall when trying to move immediately after starting a cold engine.

In general, any change in normal operation engine idling can be caused precisely by contamination of the throttle valve. The thing here is that at idle the engine operates with an almost completely closed throttle and any changes in the flow area between the throttle and its body, which is necessary for stable idling, immediately affect the operation of the engine just at its idle.

To make sure that the throttle valve needs to be cleaned, it is necessary to remove the pipe going to the throttle valve from the air filter side and gently push the valve to move it to the position of partial or full opening. If at the same time pollution is clearly visible, then this unit needs to be cleaned.

How to clean the throttle body
There are no special difficulties in cleaning the throttle valve. This procedure can be carried out qualitatively only by completely removing the throttle valve from the engine. Let's consider the process of cleaning the throttle valve using the Duratec 1.8-liter engine of the Ford Focus car as an example.
After the actions taken, all problems with the engine idling that were associated with throttle contamination should disappear. Power point will make you happy again stable job at idle and under load during the transition from low to high speeds.