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 of 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.
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.
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.
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.
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Remote control position sensor
The remote control position sensor can be contact (supplied as standard) or non-contact. Most often, a non-contact TPS is installed after removing the old one and discovering that it will not be possible to restore it efficiently.
This sensor on the VAZ 2110 is located directly on the throttle pipe, attached to the throttle axis.
The following symptoms indicate that the VAZ 2110 TPS needs to be checked and it needs to be cleaned (and possibly replaced):
- “Floating” idle speed;
- When the gas pedal is pressed during acceleration, the car moves jerkily;
- Increased fuel consumption compared to before;
- It is possible (but not certain) that the "Check Engine" light on the dashboard will light up.
The main danger is that if the TPS malfunctions, it will distort information regarding the position of the damper, then your VAZ will be guaranteed interruptions in engine operation, plus excessive fuel consumption.
How to Clean Your Throttle Body - Step-by-Step Guide
1. First of all, you need to remove the plastic (decorative) engine cover.
2. Then you need to unscrew the expansion tank cap in order to reduce the pressure in the cooling system. 3. You need to loosen the clamps (see photo, they are indicated by arrows)
4. Remove the forced ventilation hose from the air pipe. Carry out a visual inspection if you find traces of oil in the air pipe - most likely the thin forced ventilation channel in the throttle assembly is clogged. If this is so, then all crankcase gases, together with oil particles, go through a large ventilation branch.
5. Take a screwdriver and loosen the two clamps, then remove the throttle body heating hoses, they can be plugged for a while with something like bad spark plugs.
6. Remove the hose of the gas tank ventilation system; to do this, you need to unscrew the clamp.
7. All that remains is to remove the cable and unscrew the two fastening nuts of the throttle assembly.
In the photo you see the removed throttle assembly, no comments necessary...
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.
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.
Cleaning
There is nothing difficult about cleaning the throttle valve. This procedure can be easily done with your own hands, without involving specialists from car services and without spending extra money.
- Using the purchased throttle cleaner, clean the channels and the entire disassembled assembly;
- Rinse the engine's forced crankcase ventilation duct especially carefully, since this is where the largest amount of pollutants comes from;
- Use sharp objects if you want to carry out the work responsibly and as thoroughly as possible. A simple knitting needle will do;
- Remove the idle air control. To do this, simply unscrew a couple of bolts;
- Be sure to wash the unit thoroughly;
- Check the condition of the rod. If it is heavily soiled or there is play, the element is easiest to replace. It's not expensive;
- Inspect the current condition of the gasket. If the gasket is damaged, be sure to buy a new one. Even if it is in satisfactory condition, we advise you to make a replacement once you have begun to dismantle this unit;
- After washing the throttle assembly elements, return all its components to their places, proceeding in the reverse order.
If you follow the recommendations, use special cleaning products and do not rush, after the washing procedure all problems with the gas pedal will disappear, the engine will again clearly respond to your “commands”.
As you can see, cleaning the throttle is quite simple. The most difficult stage can only be called disassembling the unit. And then, in the confident hands of a master, even a beginner, everything will go smoothly and without mistakes.
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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.
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 also did not go without a trace... Thank you for your attention, take care of yourself and your car.
Debugg
If you notice that the throttle has begun to perform its direct duties poorly, do not rush to go to a service station and hand over your money.
The problem with the damper can often be solved with your own hands.
Most often, a problem with the throttle occurs due to contamination, which leads to impaired functionality. To correct the situation, simply clean the element.
When Cleaning Is Required
The practice of "tens" car owners shows that on these cars the throttle becomes clogged literally just a few years after the start of active use of the car.
The biggest “pests” for the damper are particles of oil, dust and gases coming from the engine crankcase.
When the engine is running, dust mixes with air and oil, forming a kind of mixture that enters the throttle valve. Over time, this substance sticks to surfaces and accumulates on the idle rod.
Soon the thermal gap becomes covered with dirt, and access through the idle air regulator channel is significantly deteriorated. If you do nothing, the engine will begin to work incorrectly, the dynamics will drop, and the engine will respond late to pressing the gas pedal.
Signs of contamination
Problems with the throttle valve can be identified by characteristic symptoms.
Engine has difficulty returning from high to low speeds
This happens when you take your foot off the gas pedal. Instead of a smooth return to the required parameters, the speed literally drops to the 400 rpm mark. The engine may stall and begin to shake. The speed can return to the desired level, but with difficulty
Do-it-yourself throttle cleaning
Regarding cleaning or rinsing, very little can be said, since after removal everything is done in just a few minutes. It is enough to have a good carburetor cleaner on hand. From personal experience, I used a thing from Ombra (by the way, I also have such a tool).
I can’t say anything bad about the other products, since I haven’t used them, but with regards to this product, I have only positive emotions. Removes all soot and black deposits in seconds. The only drawback is the rapid consumption of liquid; the hole in the sprayer could be made a little smaller.
Also, it is worth noting that for high-quality cleaning it is better to unscrew and remove the TPS, as well as the IAC. After washing and cleaning, install everything in the reverse order. By the way, I forgot to mention the price of the cleaner: this volume of 500 ml can be purchased for 250 rubles.
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