Throttle valve diagram for VAZ 2110

Signs of trouble

The problem with many VAZ 2110s is that until a serious increase in speed, the car remains, as motorists say, in a “sluggish” state, it does not pull, and becomes more or less playful only when the revolutions reach approximately the 3000 mark.

This is very often associated with improper throttle operation. Moreover, the main culprit may be the manufacturer, but more on that later. And now - about some more signs of malfunction:

engine speed fluctuates;
there is no clear response from the car when you press the gas pedal;
when changing gears, jerking can be observed;
vibration is observed when the car is idling;
stalls when changing speed;
The engine does not start well if the car is already warmed up and then turned off.

Evidence of pollution

Don't forget that the throttle valve can become dirty. Signs of this are the following criteria: the engine begins to stall, lose speed, the engine starts with difficulty, at the minimum speed of the car, jerking begins. Always check the throttle assembly for causes of problems. Damper contamination occurs in many cases. Settlement occurs on the walls of the mechanism, entering the assembly due to ventilation of gases. Another reason is poor filter performance.

Correction of a factory miscalculation

It is quite common for a throttle assembly to come out of the factory with something that cannot even be called a defect, but can still be attributed to design errors. In theory, air should flow into the space behind the throttle, for which a channel of approximately 2.5 mm is specially made.

But the whole problem is that this channel was pressed against the wall of the receiver, thus blocking the possibility of air flow. A slight modification of the throttle assembly can help in this case.

Bored channel for air flow in the throttle

To do this, just take a file and use it to make a small groove in the indicated place. 2 - 3 mm will be enough. But before doing this, it is necessary to remove the throttle.

Dismantling

On a VAZ 2110, the throttle assembly is removed in the following sequence:

Disconnect the connectors of the sensor that regulates the position of the throttle valve, its drive cable and the XX regulator;
We partially drain the coolant;
Next is the removal of the air hose located on the body of the mass air flow sensor. Why do you just need to loosen the clamp;
We also loosen the clamps: where the throttle pipe is attached to the air hose; where the hose of the 2nd crankcase exhaust circuit is attached to the cylinder head cover pipe. We remove the connected hoses - the air and 2nd crankcase ventilation circuits;
Having loosened the clamp, remove the hose of the 1st crankcase gas exhaust circuit from the throttle assembly fitting;
Having loosened the clamps, we remove the hoses supplying and discharging coolant;
You will need a wrench with a 13mm head, with which you need to unscrew the nuts securing the throttle assembly to the receiver on a VAZ 2110;
It is now possible to remove the throttle assembly from the studs;
It remains to remove the sealing gasket and, if your VAZ 2110 has a system that traps gasoline vapors, disconnect the hose for purging the adsorber.

Cleaning

Even if the purpose of removing the throttle was to modify it, still do not forget that for stable operation it also needs periodic cleaning. To be honest, there is nothing complicated in this procedure, but it will help the engine run better, which is quite important.

For cleaning you will need:

short and long screwdrivers;
toothbrush (soft, or just old);
cotton buds;
cleaning agent;
rubber or cotton gloves.

For cleaning to give the desired result, it must be carried out very carefully. First, you can go through all the cavities with a toothbrush, at the same time cleaning the idle speed control (it must also be removed). Further, more delicate, cleaning is done with cotton swabs. Pay special attention to the area where the throttle valve is located and the place where the XX regulator fits.

Please note that cleaning the crankcase ventilation duct with conventional means is not possible, but it can be easily done using the foot pump available in each trunk. The diameter of the fitting is similar to the wheel one, you just need to add cleaning agent and pump your foot several times.

If you have problems mentioned at the beginning that started recently, cleaning should fix them. If there were problems from the beginning, do not forget about improvements. Sometimes only replacing the throttle assembly helps.

Superficial intervention or deep cleaning?

There are two ways to clean the throttle valve. The first is a superficial intervention that does not require complete removal of the entire device. And the second is a complete cleaning, which must be performed in cases where your car’s engine is not working well.

To perform the first type of cleaning, you will need a pre-purchased cleaning product and a fine brush. Open the hood, remove the corrugation, it goes from the air filter housing to the throttle valve. You will see a valve - it is easy to recognize by its completely round shape. Treat it with a chemical and let it sit for a few minutes, then remove the dirt with a brush. If necessary, use a rag. Repeat the procedure several more times until the flapper valve turns a bright color. This work can be carried out once every 3–5 thousand kilometers, fortunately, it does not take much time.

Removing the corrugation from the throttle valve

For more detailed cleaning of the throttle valve in a VAZ 2110, you need to completely remove the entire injector mechanism. It is also recommended to replace the gasket and O-ring, which are included in the throttle valve repair kit, which is easy to buy at any auto store. Before starting cleaning work, remove the terminals from the battery.

Then disconnect all air pipes connected to the throttle body. After this, remove the fastenings of the throttle cable and unscrew the throttle valve itself. It is attached to two bolts that are screwed into the engine housing. Electronic sensors must be disconnected carefully to avoid damaging them.

Disconnecting the air pipes of the throttle assembly

After that, take a chemical and treat the entire body and all the grooves of the throttle body. Do this until you completely get rid of the dirt. You can also clean the air flow meter sensor. To do this, carefully treat its hairs with a cleaning product and remove the dirt with a brush. Give the entire device time to dry completely before reassembling. Do not forget to change the gasket and ring, which are located in the corrugation. Also pay attention to whether all air pipes are intact. Perhaps some require replacement with new ones. For maximum effect, you can also replace the air filter.

Purpose and design of the throttle valve

The throttle valve in a VAZ 2110 car is a whole unit that is installed in the air duct system. At the inlet there is a pipe from the air filter, the outlet is connected to the intake manifold. The throttle must regulate the flow of air that enters the engine. Due to this, the motor power is regulated.

The design of the throttle valve (VV) uses an actuator. It can be mechanical or electronic. The throttle position directly depends on the position of the gas pedal.

An important element in the DS is the throttle sensor. On the VAZ 2110 it is made in the form of a potentiometer that produces a signal. It changes depending on the throttle angle. This signal is sent to the engine electronic system. The electronic control unit doses the incoming fuel.

During operation, the throttle valve assembly becomes dirty. Fuel combustion products can settle on the side of the collector, and dust on the other side. The presence of contamination in the throttle valve of the VAZ 2110 affects the stable operation of the engine.

The main signs of contamination in the throttle valve block:

poor vehicle acceleration dynamics;
Unstable engine operation at idle;
The car moves jerkily, there is no smooth ride.

If these signs appear, it is recommended to clean the throttle valve on the VAZ 2110. To carry out this operation, special auto chemicals are used. The most commonly used product is to clean carburetors.

Cleaning the throttle body will cost much less than buying a new throttle body for a VAZ 2110. The price of a new unit is several times higher.

To clean the throttle unit with your own hands, you must use the following materials and tools:

screwdriver;
set of tools with keys and heads;
new throttle body gasket;
protective gloves;
carburetor cleaner;
ear sticks for hard-to-reach places;
old toothbrush.

The procedure for cleaning the throttle valve on a VAZ 2110:

1. Raise the hood of the car. Remove the terminals from the battery. It is enough to throw off the negative terminal. To do this, we use a key set to 10. 2. Dismantle the receiver. Loosen the clamps on the 5 pipes. We remove the pipes. Four pipes are visible from above, the fifth is located under the throttle valve assembly. 3. Disconnect the connectors from the sensor on the throttle valve and the idle air control (IAC). 4. Disconnect the throttle control cable. 5. Unscrew the throttle block from the receiver with a key. 6. Using a screwdriver, unscrew the idle speed control crosswise. We remove the IAC from the throttle block. 7. Using a cleaning product, an old toothbrush and ear sticks, we clean the throttle unit. We pay special attention to the channels and landing sites of the IAC. Remove carbon deposits and dig. Before using a special carburetor cleaner, you can wash the unit with plain gasoline. 8. It is recommended to apply lubricant to the idle speed control rod. To do this, we use silicone grease, which will help extend the service life of the IAC and the throttle unit as a whole. 9. Assemble the throttle assembly. We screw it to the receiver, not forgetting to install a new gasket. We connect all pipes and connectors.

An important part of the throttle valve is the “nickle”. Some car enthusiasts bore out the assembly chamber and install a “penny” of increased diameter. This can achieve a more enriched combustible mixture. Motor power increases. It is better to entrust the engine tuning operation to a motor specialist. You should not carry out such an operation on your own, without good preparation.

Another reason for unstable behavior of an internal combustion engine may be a faulty throttle sensor. On a VAZ 2110, you can replace the sensor yourself. Its price is low. It is recommended to use a non-contact sensor. Its cost is slightly higher, but the sensor will last significantly longer.

You can diagnose the sensor yourself. For this you need a tester. Let's look at it step by step:

The ignition must be turned on. We measure the voltage between the potentiometer contact and the “minus”. The correct value on the voltmeter is 0.7 Volts.
We turn the plastic sector to the limit, thereby opening the damper completely. The voltmeter should show 4 Volts.
The ignition should be turned off, disconnect the connector from the sensor and measure the resistance of the potentiometer of the remote sensing sensor.
We smoothly turn the sector and observe the tester readings. If the sensor is working properly, the needle will move without jerking and smoothly. If this is not the case, then the throttle sensor should be replaced.

Throttle valve, potentiometer, idle speed controller

Gasoline is used as fuel in the internal combustion engines of VAZ-2109, VAZ-2110 and other models produced or produced by the Volzhsky Automobile Plant. However, in the cylinders it does not burn on its own, but in a mixture with air. The throttle valve is needed to prepare the air-fuel mixture in the required proportions. It is located behind the air filter in front of the intake manifold.

Basically, the throttle valve is an air valve that regulates the amount of air entering the engine. The principle of its operation is to change the cross-section of the air channel. When it is fully open, air flows freely into the intake manifold. To determine the opening angle, a throttle position sensor is used, which is connected to the engine control unit. Based on the signals transmitted by the sensor, the control unit issues a command to increase the amount of fuel injected, the working mixture is enriched, and the engine operates at maximum speed.

The smaller the throttle opening angle, the less air enters the manifold, and the lower the engine speed.

Normal operation

Air enters through the gap formed by the damper, but the regulator does not work. A mixture formation process occurs in the fuel rail - gasoline is suspended (like fog) under high pressure. Its value is constant and is regulated using a sensor and an overpressure valve. After the mixture is formed, fuel is injected into the combustion chambers - the injectors open one by one (in fact, these are electromagnetic valves). They are controlled by an electronic unit. Their operation completely depends on the readings of the sensors and the fuel map (firmware of the microcontroller control system).

Throttle valve device

The throttle valve itself is a round plate capable of rotating 90 degrees around its axis (from fully closed to fully open). It is installed inside the housing, where its drive, idle air control (IAC) and throttle position sensor are located. All these elements together form the throttle body or throttle assembly. It should be noted that on the VAZ-2109 with an injection engine, the VAZ-2110 and the VAZ-2115, the same unit is used.

The design of the throttle body is not as simple as it might seem at first glance. Among other things, it is also part of the engine cooling system. It has channels for coolant circulation. It is also equipped with pipes, one of which is connected to the engine crankcase ventilation system, and the second to the gasoline vapor recovery system.

Idle speed control

The idle air control is an electromechanical device whose task is to maintain a certain crankshaft speed when the throttle valve is fully closed. For example, while the engine is warming up or the load changes, when additional equipment is turned on. The design of the idle speed controller is as follows: inside the housing there is a stepper electric motor, to which a spring-loaded conical needle is connected. When the engine is idling, the needle, moving back and forth, adjusts the cross-sectional area of the bypass air channel through which air passes when the damper is fully closed.

The throttle valve can have two types of drive:

mechanical, like VAZ-2109, VAZ-2110, VAZ-2114;
electric, which is used on most modern cars.

Mechanical drive

For the VAZ-2109, VAZ-2110 and other outdated models of the Volzhsky Automobile Plant, the throttle valve is connected to the gas pedal via a steel cable. The mechanical drive has a very simple design and low cost, so it is still used on many inexpensive cars.

Electric

If the throttle valve is equipped with an electric drive, then there is no direct connection between it and the gas pedal. The principle of operation of an electric damper does not change, but its design is much more complex. Simplified, such a node works as follows. The force of pressing the gas pedal is recorded by a special sensor, which transmits this information to the engine control unit, the throttle opening angle is determined by the throttle position sensor, and also transmits the corresponding signals to the control unit. The controller constantly compares these values and sends commands to the electric motor to increase or decrease the damper opening angle.

The main distinguishing feature of the electric throttle valve is the absence of an idle speed control. When the engine is idling, the throttle valve does not close completely; its opening angle is set by the control unit in accordance with the operating parameters of the power unit. The electronic throttle, unlike the mechanical one, has not one position sensor, but two. If one sensor, also known as the throttle potentiometer, fails, the throttle assembly will still work.

Repair work

Now to the question of how the cleaning procedure is performed. For everything to go smoothly and without problems, it is enough to prepare all the necessary materials and tools in advance, place everything at hand and get to work.

To clean the throttle you will need:

Screwdriver Set;
13mm wrench;
Throttle valve cleaner.

Specialized preparations made from appropriate components are sold specifically for these purposes. Do not spare money on their purchase, since the funds will last for a long time. This is more profitable than changing the damper every time.

Cleaning with special means

Preparation

Let's start with the preparatory activities that will ultimately allow you to get to the throttle body and more and clean it properly.

Remove the casing that is installed on the power unit.
Unscrew the cap on the expansion tank. This will allow you to relieve excess pressure from the cooling system.
Slightly loosen the tension on the mounting clamps, then remove the forced ventilation tube.
Examine the current condition of the air pipe, which should also be removed and, if necessary, replaced.
If there are significant traces of oil in the pipe, then you can be 100% sure that the throttle is definitely clogged.
The problem is most likely in the forced ventilation duct. This is explained by the fact that contaminants in the form of gas from the crankcase and oil particles have no other way than through the ventilation branch.
Next you need to remove the damper heating tubes. To do this, just loosen the clamps with a screwdriver.
For a while, come up with plugs for them from improvised means - old spark plugs, some kind of non-hollow rubber bands. In short, anything that fits the diameter of the hole.
Remove the fuel tank ventilation system hose. To do this, you must first unscrew the clamp, remove the cable and unscrew the throttle mounting nuts.
Be sure to remove the connectors from two sensors - idle speed and throttle position. They are located on the unit being repaired, so there will be no problems with the search.

Throttle position sensor

This sensor is a potentiometer. When you press the gas pedal, the position of the damper and the voltage supplied to the controller changes. When closed, the voltage is 0.7V, when fully open it is 4V. In accordance with these data, the sensor controls the fuel supply.

If a malfunction of the position sensor occurs, the controller will not be able to correctly determine the position of the damper. This results in the following malfunctions:

in all engine operating modes, the speed begins to fluctuate; at idle, the speed will be increased;
when you switch off the gear (neutral) while driving, the engine may stall;
Sometimes the CHECK light may come on.

To check the functionality of the position sensor, you can use a multimeter. With the ignition on, the probes are connected to connectors B and C. Changing the position of the damper should lead to a change in voltage.

Why is it necessary to modernize the throttle valve on VAZ-2109, 2110, 2115

Spare parts stores sell throttle assemblies with valves of increased diameter (52, 54 and 56 mm) for VAZ-2109, 2110 or 2115 cars. According to the sellers, by installing such a valve instead of the standard 46 mm one, the car owner will receive significant advantages: the car becomes more responsive to the gas pedal, problems with idle speed disappear, the car's dynamics improve, and this is especially noticeable if you replace the standard air filter with a zero-resistance filter. The main argument that they try to convince car owners is that the engine requires more air to operate efficiently, for which it is necessary to replace the standard throttle assembly with an improved one. They even give figures: the diameter of the VAZ-2109 or VAZ-2110 receiver is 53 mm, and a damper with a diameter of 46 mm allegedly “strangles” the engine.

Tuning by replacement

The standard valve (throttle assembly) usually has a diameter of 46 millimeters; many fans of various tunings decide to replace this part with an alternative one:

VAZ 2112 throttle valve 52 has a larger diameter (there are also valves of 54 and 56 millimeters)
Is there any benefit from such tuning?
In various online stores they often offer to replace the standard 46 mm throttle body (DU) and install 52, 54 or 56 mm
The product description says that an enlarged throttle body (also known as the throttle body) leads to a decrease in air flow speed, which improves the performance of the air intake system
The effect of installing an alternative damper will be clearly visible when using a zero-resistance filter in the system
We recommend installing a unit with a diameter of 52mm, because... the diameter of its air inlet for a standard receiver is 53mm

The valve is standard (standard) on the left and new (increased flow diameter) on the right

In order to install a remote control of a different diameter, as a rule, nothing needs to be modified
The maximum necessary action is a small trimming of the gasket (this is most often necessary when installing a 56mm throttle assembly)

The following positive effects are noticed after such an installation:

The car becomes more agile
Problems with idle speed disappear
The gas pedal also becomes more responsive.

Installation disadvantages:

Fuel consumption increases, although many believe that the BC gives incorrect readings and consumption does not change
Some owners see the effect exclusively on 16-valve engines

The picture we described above may appear completely different:

All the positive effect that many people notice when installing a larger diameter remote control usually appears because the old remote control already needed cleaning and naturally the motor was not working correctly
After installing a (clean) new remote control, the engine starts working in its normal mode, this seems like a “new breath”
In other words, all the described effects appear after regular cleaning of the remote control.
And besides this, after replacing the remote control, with a larger diameter you will have new problems with the operation of the motor that did not exist before
This is due to a violation of the ratio of gasoline and air, which the ECU is no longer able to correct.
And instead of simply returning the remote control to the standard diameter, the owners are recommended to replace the firmware, the price of which is higher, but there is no point
There is also an opinion that a remote control with a diameter of 52, 54 or 56 millimeters is a completely useless thing, and only installed in combination with other engine tunings produces a noticeable effect
It remains unclear whether this effect is caused by remote control or other modifications to the engine
After all, if on a turbo engine with a power of no more than 200 horsepower, standard 46mm dampers are left and their work is quite enough

Signs of trouble

This is very often associated with improper throttle operation. Moreover, the main culprit may be the manufacturer, but more on that later. And now - about some more signs of malfunction:

engine speed fluctuates;
there is no clear response from the car when you press the gas pedal;
when changing gears, jerking can be observed;
vibration is observed when the car is idling;
stalls when changing speed;
The engine does not start well if the car is already warmed up and then turned off.

Functions

In simple terms, without terminology unnecessary for most motorists, the throttle valve is nothing more than the gas pedal of your car.

By pressing or releasing this pedal, you thereby close or, on the contrary, open this damper.

The device provides a path for additional air to enter. When you press the gas pedal to the floor as much as possible, you open the throttle fully, so the engine speed increases.

Correction of a factory miscalculation

Bored channel for air flow in the throttle

To do this, just take a file and use it to make a small groove in the indicated place. 2 - 3 mm will be enough. But before doing this, it is necessary to remove the throttle.

On a VAZ 2110, the throttle assembly is removed in the following sequence:

Disconnect the connectors of the sensor that regulates the position of the throttle valve, its drive cable and the XX regulator;
We partially drain the coolant;
Next is the removal of the air hose located on the body of the mass air flow sensor. Why do you just need to loosen the clamp;
We also loosen the clamps: where the throttle pipe is attached to the air hose; where the hose of the 2nd crankcase exhaust circuit is attached to the cylinder head cover pipe. We remove the connected hoses - the air and 2nd crankcase ventilation circuits;
Having loosened the clamp, remove the hose of the 1st crankcase gas exhaust circuit from the throttle assembly fitting;
Having loosened the clamps, we remove the hoses supplying and discharging coolant;
You will need a wrench with a 13mm head, with which you need to unscrew the nuts securing the throttle assembly to the receiver on a VAZ 2110;
It is now possible to remove the throttle assembly from the studs;
It remains to remove the sealing gasket and, if your VAZ 2110 has a system that traps gasoline vapors, disconnect the hose for purging the adsorber.

For cleaning you will need:

short and long screwdrivers;
toothbrush (soft, or just old);
cotton buds;
cleaning agent;
rubber or cotton gloves.