Clean the throttle valve VAZ 2112 16 valves without removing

Do-it-yourself cleaning of the throttle valve on a 16-valve VAZ-2112

After the car has been intensively used for several years, its throttle assembly will become dirty. In this case, it will need cleaning, as the engine will become unstable.

You can find out more about cleaning the throttle assembly on a VAZ-2112 in the video below:

Malfunctions

Symptoms of the problem can manifest themselves in different ways, but this mainly affects the engine’s throttle response.

Signs of a malfunction of the TPS, indicating its breakdown:

• difficult starting of a cold engine;
• unstable idling until the engine stops completely;
• forcing the gas causes failure of the engine followed by a sharp increase in speed;
• idle mode is accompanied by increased speed;
• fuel consumption increases unjustifiably;
• the temperature indicator tends to go into the red zone;
• From time to time, the “Check Engine” message appears on the dashboard.

Worn resistive sensor track:

Symptoms of pollution

1. It becomes difficult for the engine to switch from high speeds to lower speeds and vice versa.
2. The engine stalls while moving with shaking and has great difficulty restoring normal speed.
3. The engine stalls at idle speed.
4. Cold starting of the engine is difficult. In order to start the engine, you need to turn it with the starter for a long time.
5. You will smell gasoline from the exhaust pipe.
6. The first few minutes after starting the engine will “triple”.

It is recommended to clean the damper every 50-60 thousand kilometers . You should also periodically perform certain preventive actions.

Causes of pollution

A mixture of dust and oil particles slowly covers the surface of the valve during operation. This is especially noticeable in places where there are air turbulences.

If you do not clean it on time, then over time the thermal gap will become overgrown with such plaque. Also, the valve stroke in the damper, which regulates the idle speed of the car, will decrease.

Cleaning the damper

This work must be done with the engine turned off. You also need to wait until it cools down to avoid burns.

Source

Removing the unit

The purpose of the throttle assembly (abbreviated as DU) is to regulate the air supply to the engine cylinders. Thus, it controls the enrichment or leanness of the fuel mixture. The appearance of remote control malfunctions causes improper operation (interruptions) of the motor. If problems arise, the remote control is usually replaced with a new one, but often such problems are solved by removing and washing the remote control yourself.

What you need for cleaning

To remove and clean the assembly you will need:

• Screwdriver Set
• Head "13" with ratchet
• Old toothbrush with stiff bristles
• Cleaner
• Cotton swabs
• Latex gloves

• We remove the terminals of the VAZ battery, de-energizing the electrical network of the motor
• Disconnect the connectors from the throttle position sensor, idle speed control, and also remove the cable from the throttle valve actuator
• To avoid losses, partially drain the coolant
• Then loosen the clamp securing the air hose to the throttle body
• Then a clamp securing the ventilation hose of the 2nd circuit (crankcase gases) to the pipe on the cylinder head cover
• Now you can remove the air hose along with the crankcase ventilation hose

After releasing the clamps, remove the air hose

• Take a Phillips screwdriver and loosen the clamp, then remove the hose for crankcase ventilation (from the 1st circuit) from the remote control fitting
• Then we loosen the clamps securing the hoses that discharge and supply coolant, and remove these hoses
• Now, using the “13” head, unscrew the nuts that secure the throttle assembly to the receiver, photo below

Using a ratchet and a socket “13”, remove a pair of nuts that secure the unit to the receiver

• Then we remove our throttle assembly from the studs and loosen the clamp to disconnect the hose for purging the adsorber (this is necessary if your car has a system for collecting fuel vapors)
• Carefully remove the sealing gasket under the assembly
• If you have never carried out the steps to clean the remote control, then it will most likely be necessary to replace the gasket
• Then we unscrew the screws that hold the IAC (idle speed regulator) and then remove the regulator (don’t worry, the holes for attaching the regulator are designed in such a way that it will not be possible to mix it up when installing it)

Self-cleaning of the VAZ 2110 throttle body

After several years of active use, the throttle assembly becomes seriously dirty and requires immediate cleaning; under the negative influence of crankcase gases, as well as small particles of oil and dust, the operation of the carburetor becomes unstable. Cleaning the throttle valve (DZ) should be done every 50-60 thousand km. in addition, it is necessary to carry out preventive maintenance from time to time with mandatory partial disassembly of this unit.

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.

1. Remove the casing that is installed on the power unit.
2. Unscrew the cap on the expansion tank. This will allow you to relieve excess pressure from the cooling system.
3. Slightly loosen the tension on the mounting clamps, then remove the forced ventilation tube.
4. Examine the current condition of the air pipe, which should also be removed and, if necessary, replaced.
5. If there are significant traces of oil in the pipe, then you can be 100% sure that the throttle is definitely clogged.
6. 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.
7. Next you need to remove the damper heating tubes. To do this, just loosen the clamps with a screwdriver.
8. 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.
9. 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.
10. 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.

Source

Symptoms of a dirty throttle valve:

1. It is difficult for the engine to switch from high speeds to idle when the accelerator pedal is suddenly released. For example, when you brake or coast in neutral. Instead of a smooth return to speed, they rapidly drop to 400-600 per minute, after which, as a rule, the engine stalls with characteristic shaking or with great difficulty is restored to the required speed.

2. Also, an engine with a dirty throttle assembly has difficulty with “cold” starting, and in some severe cases, “hot” starting. Before starting such an engine, you have to turn the starter for a long time, and the characteristic smell of gasoline can be heard from the exhaust. However, as soon as you slightly open the throttle several times by briefly pressing the gas pedal, the engine “comes to life” and starts. As a rule, the first few minutes it “troubles” a little. Perhaps the carburetor is tripping for another reason; read about how to adjust the carburetor here.

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.

This material will help you install engine crankcase protection yourself: https://vazweb.ru/desyatka/dvigatel/zaschita-dvigatelya.html

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.

Causes of throttle valve contamination

A mixture of air and oil, as well as microscopic dust particles that pass through the air filter from the crankcase ventilation system. When used on a car, this substance slowly covers all internal surfaces, especially in places where there is strong air turbulence, that is, behind the throttle valve, as well as on the idle air control rod. From long-term operation, the thermal gap itself becomes “overgrown” with dirt, and the cross-section of the bypass channel of the idle air regulator in the throttle valve decreases.

Today I will talk about how to clean the throttle valve of a VAZ 2110 with your own hands with a detailed description of the entire process.

Cleaning the idle speed sensor itself

Pay attention to the sensors on the ring, which must remain in place.

• Clean all parts of the throttle valve, all recesses and compartments.
• When everything is cleaned, we put everything in reverse order.
• We tighten everything well, otherwise air will leak and the engine will not work properly.
• You shouldn't have any difficulty. You have to be attentive and careful.

Now directly about how to clean the throttle valve of a VAZ 2110

1. Take the previously prepared cleaner and thoroughly clean the throttle valve, including all channels of the assembly. Pay SPECIAL attention to the calibrated positive crankcase ventilation duct; as a rule, it is so coked that you have to use a needle or a steel spoke to clean it.

Self-cleaning of the VAZ 2110 throttle body

2. Unscrew the two bolts and remove the idle air control (IAC). Properly rinse its channel in the throttle body, pay attention to its condition, the service life of the IAC is approximately 100 thousand km. If during the inspection you find that the idle air control rod is very dirty, sticks, has a lot of play or wear, I recommend replacing it with a new one.

3. If the gasket in the throttle assembly has a “human” appearance, there is no need to change it, but if it is damaged, replace it.

For those who like photos in the “before and after” style, I specially compared two images for greater clarity and demonstration of the work done.

Assembly is carried out in reverse order. That's all there is to cleaning the throttle valve, put everything back together and check the result. The result will be incredible, I can say from personal experience that after I cleaned the throttle valve the car seemed to have been replaced, everything changed, the engine performance, idle speed and sound changed so much that it seemed to me that the engine of my car had been replaced, or I had done something wrong » in the adjustments. While driving, an unprecedented throttle response and sensitivity came from somewhere, the engine began to gain speed faster and “eat” less fuel. The idle speed has stabilized, in short, the result is simply stunning. I hope your throttle valve cleaning was also successful. Thank you for your attention, take care of yourself and your car.

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Replacing TPS

Replacing the auto sensor takes place in several stages, it is quite simple, even a novice car enthusiast can do it. First you need to turn off the ignition and disconnect the wire from the negative terminal on the battery. Then you should press the plastic latch and also disconnect the block with the existing wires from the sensor. To completely remove the device being replaced, unscrew the two bolts using a Phillips screwdriver.

Foam rubber is used as a seal between the throttle pipe and the sensor. It is a component and also needs to be replaced. When installing a purchased device, you need to carefully tighten the mounting screws until the ring is completely compressed.

After installing the sensor, you should connect the wires. Since no further adjustment is required, the work can be considered complete. The entire process of changing the device takes no more than a quarter of an hour.

Let's sum it up

Here everyone decides for himself, we will not enter into disputes, there are simply different opinions, and we are obliged to warn about the pitfalls and the other side of the coin.

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.

Location

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.