As is known, fuel-injected cars use many sensors that are necessary to monitor and control the operation of the engine. To operate an internal combustion engine, you need not only fuel, but also air, and the accelerator pedal actually regulates engine speed by supplying air to the cylinders. The more air entering the cylinders, the more fuel is needed for the correct fuel mixture ratio.
In injection cars, which is the VAZ 2114, a special unit called a throttle valve is used to regulate the air.
This article talks about the VAZ 2114 throttle valve, namely its purpose, design, signs of malfunction, cleaning and removal.
Cleaning the throttle assembly of VAZ 2114
As is known, fuel-injected cars use many sensors that are necessary to monitor and control the operation of the engine.
To operate an internal combustion engine, you need not only fuel, but also air, and the accelerator pedal actually regulates engine speed by supplying air to the cylinders. The more air entering the cylinders, the more fuel is needed for the correct fuel mixture ratio. In injection cars, which is the VAZ 2114, a special unit called a throttle valve is used to regulate the air.
This article talks about the VAZ 2114 throttle valve, namely its purpose, design, signs of malfunction, cleaning and removal.
Necessary tool
Because To most effectively clean the throttle body from oil deposits and dirt, the assembly should be completely removed; the following tools will be useful:
- Phillips and flathead screwdrivers;
- A 13mm spanner or a set of ratchets with heads (for easier dismantling);
- Cleaner for carburetors and throttle valves. It is most convenient to use the “cleaner” in the form of a spray, because... they can reach all throttle cavities;
- Compressor with compressed air (or car pump);
- When dismantling the damper, the old gasket may become unusable, so in case it wears out, purchase a spare gasket.
Note that it will be quite difficult to wash the throttle valve on a VAZ 2114 without special chemicals, because Old oily dirt deposits are very difficult to wash off with plain water.
Important! When cleaning the throttle, do not use metal brushes, sandpaper or a file, as You risk damaging the inner surface of the throttle, which will lead to a loose fit of the valve to the body of the unit.
Purpose
The VAZ 2114 throttle valve is designed to regulate the air flow supplied to the cylinders. On the 14th Lada model, two types of throttle valves were used: mechanical and electronic.
The damper is mounted on an axis, which is movable and opens when you press the gas pedal, thereby opening the air supply line. The throttle valve also contains additional sensors necessary for engine operation, such as: TPS and IAC.
These sensors regulate idle speed and are responsible for the stability of engine speed.
Design
The throttle assembly is made of aluminum, and there are many mechanisms inside it, such as a damper actuator and a damper position sensor control drive. The TPS is installed on the same axis with the throttle valve. A little lower than the TPS there is an idle speed controller; this is a worm-type DC motor on the shaft of which there is a valve that blocks or opens the air flow necessary for the engine to idle. For IAC, the remote control has a special channel through which air flows when operating at IAC.
Types of remote control
The VAZ 2114 was equipped with two types of throttle valves: mechanical and electric. Let's look at each of the dampers in more detail, and also talk about the pros and cons of these units.
Mechanical damper
Such a damper is controlled using a gas pedal cable, that is, a cable runs from the pedal assembly in the car interior to the remote control, which opens the damper when you press the gas pedal. Such a throttle was installed on the VAZ 2114 from the very beginning of its production. The mechanical throttle contains additional sensors necessary for engine operation.
The mechanical remote control is equipped with heating, and it is through it that the engine cooling system pipes pass.
This part is quite reliable and lasts for a very long time without any damage, but, like all components, it has its pros and cons.
Pros:
- Simple design;
- Throttle heating;
- Simple mechanism;
Minuses:
- The presence of two sensors that often fail;
- Frequent contamination of the XX channel;
Electric damper
An electronic throttle unit appeared on the VAZ 2114 in 2011 and became known as the E-GAZ system; this damper made it possible to abandon the TPS and IAC sensors. All necessary processes for adjusting the air supply at idle and at speed are regulated by the damper itself.
On this throttle, heating was abandoned, since it was no longer required. This damper has become much more advanced and modern.
Pros:
- No IAC and TPS;
- Reliable design;
- The damper gets dirty less often;
Minuses:
- Many people complain about the gas pedal being laggy and responsive;
How to check IAC?
Checking the DXX should begin with a visual inspection. Sometimes you can notice oxidation of the contacts or damage to the wiring or the part itself. And to fix the problem, you will need to clean the contact connections, restore the integrity of the wires, or replace the sensor.
If no external defects are found, diagnostics should be performed with a multimeter. You can make sure that voltage is supplied to the regulator as follows:
- Turn on the car ignition;
- Switch the measuring device to voltmeter mode;
- Install the negative terminal of the voltmeter on the motor housing;
- Connect the positive terminal of the device to contact A of the regulator, and then to D.
The device screen should display a value of approximately 12 Volts. If it is different, then there is a break in the wiring. To check the IAC itself, you need:
- Remove the sensor from the car;
- Set the multimeter to ohmmeter mode;
- Connect the tester terminals to contacts A and B of the part, and then to C and D. If the sensor is working, the device will show 50-53 Ohms;
- Connect an ohmmeter to terminals A and C, B and D. The resistance should approach infinity.
If the tester readings are different, the regulator has failed. If it breaks, it needs to be replaced. You can diagnose and replace the element yourself. There is usually no need to contact a car service center with such a problem.
Cleaning the throttle
The throttle valve must be cleaned every 50-70 thousand km of the vehicle. Because due to its design, the throttle often becomes dirty, which leads to uneven idling and other problems associated with engine speed.
To clean the throttle, it must be removed from the vehicle.
- To do this, unscrew all the pipes and hoses suitable for it;
- We remove the connectors from the sensors if it is a mechanical throttle;
- We unscrew the nuts securing the throttle to the receiver: electronic remote control – 3 nuts, mechanical – 2 nuts;
- We take out the throttle;
Attention! On an electronic throttle, it is prohibited to press on the valve, as this may damage the mechanism.
- Flushing consists of cleaning the throttle walls and flap from carbon deposits; for this it is best to use a carburetor cleaner;
- On a mechanical throttle, it is also necessary to flush the IAC channels; to do this, it must be removed;
- After washing the remote control, we install it in place, not forgetting to replace the gasket, if it is torn, between the remote control and the receiver.
Cleaning video
Car service nuances
It's no secret that many car owners prefer repairs at service stations. There are many reasons for this.
If you need to clean your throttle body, you won't have to pay a lot of money for it. Today such a service costs about 500 rubles.
But there are several nuances that should be taken into account when visiting a service station.
In addition to cleaning the damper, the technicians will begin to assure you that additional cleaning of a number of components is required, as if without this the repair will not be complete and the effect will not be achieved. All this is a banal attempt to charge you more money for unnecessary work. They may start telling you that the damper is cleaned every 15, or even 10 thousand kilometers, they will offer their services, maybe even provide a discount as a regular customer. Again, the simplest trick. This figure is completely untrue. The frequency of cleaning the throttle valve on a VAZ 2114 car recommended by the manufacturer is 60-70 thousand kilometers. But in practice it turns out to be about 50-60 thousand kilometers.
You just need to monitor the condition of the unit and pay attention to the symptoms of contamination that we have already introduced you to today.
https://youtube.com/watch?v=Xh9LUV37tiE
Whether to do the work yourself or have it done at a car service center is entirely up to you. The most important thing is not to let the problem get worse, as it can result in really expensive repairs.
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Signs of a dirty remote control
The most common symptoms associated with a dirty damper:
- Poor engine starting.
- Unstable idling, speed fluctuates.
- The car jerks when driving at low speeds.
- Difficulty idling, engine stalls.
All these signs indicate a dirty remote control. But do not rush to draw conclusions and start cleaning the unit, because they may also indicate a breakdown of some sensors: IAC, TPS - they are located on the throttle assembly and may be faulty. In particular, high-quality washing of the remote control can cure them, but not a fact (by following the link, you can check, clean, replace the IAC, check the TPS, repair and replace it). A faulty mass air flow sensor also has similar symptoms. It is advisable to clean the remote control at intervals of 30 thousand km.
ABOUT THE PREREQUISITES FOR ITS CLEANING
The following signs of a dirty throttle body should alert the driver that it is time to clean the throttle body:
- The smooth transition from high to low speeds disappears. The motor may stop spontaneously;
- It is very difficult to start the engine in the cold season. It may be accompanied by the smell of gasoline from the exhaust pipe;
- When starting the engine, vibration and “triple” are observed, since there is not enough working mixture for all cylinders;
- Inability to coast or engine braking.
To get rid of all this, you need to clean the throttle body. In some cases this happens earlier, in others later, but it is necessary to clean the throttle valve. The main culprits of pollution are small particles of dust, which still penetrate through the air filter, and the fuel mixture. When they get on the moving parts of this unit, they impede their movement, reduce the flow area of the intake tract, and clog the channel and rod of the idle speed sensor. Various sources recommend carrying out preventive work when a car runs away from 40 to 50 thousand km. When operating the car in areas with heavy dust, the car will not reach these mileage figures, the unit will clog earlier. Operation in areas where snow cover persists for a long time, this mileage may be even longer.
The quality of the fuel and engine oil used influences the timing of flushing the throttle assembly. Please also consider this issue very carefully.
Flushing the remote control
In this article we will describe two types of DS cleaning:
- Surface.
- Full.
They differ in the degree of complexity and, accordingly, in quality.
Superficial cleaning
Its essence is that we will not completely disassemble the entire remote control, but will go over the damper with a cloth and remove surface dirt.
For work we will need:
- Any cleaning agent: carburetor cleaner, alcohol, thinner, gasoline, wd-40. They differ in the degree of “removability” of dirt.
- Rag.
- Brush.
First of all, we remove the air filter corrugation from the air filter, take our cleaning agent and spray it inside. We begin to clean the surface with a rag and brush. Also, do not forget to open the damper itself and clean it from the back. At this point the process is completed, we install the filter pipe back, and that’s it. But with this cleaning method, we will not be able to completely clean all the insides of the remote control, blow out all the holes and channels, so it is better to use a complete cleaning.
Step-by-step instruction
All repairs are divided into two stages - disassembly and cleaning. The cleaning time depends on the degree of contamination of the damper and the general wear of the engine. There is no need to use great physical force here; each stage can be done alone without outside help.
What you need for washing
Repairs must be carried out after the engine has cooled down. To remove the throttle assembly, you will need two screwdrivers, as well as a 13mm socket wrench. Almost every car enthusiast has these tools. Any cleaning agent is suitable for working with the damper itself, the main thing is that it removes oil and soot well. For better cleaning, we recommend using cotton swabs; they will help you reach the most difficult to reach places.
Cotton swabs will help to better clean the damper from dirt
When disassembling the mechanism, it may turn out that some consumables are no longer suitable for further use. Therefore, it is better to purchase a throttle valve gasket or a receiver O-ring in advance, depending on the engine size.
Removing the throttle assembly and cleaning it
The throttle assembly must be removed in the following sequence:
- Having opened the hood, remove the plastic cover that covers the top of the engine.
- Remove the rubber vent hose. If there is a large amount of dirt, remove it with a regular rag. Remove the ventilation hose using a screwdriver
- Before removing the mechanism itself, we will need to relieve the pressure from the cooling system. To do this, remove the hoses with the antifreeze liquid, having previously wrung out several clamps. We remove the hoses with antifreeze liquid, having previously wrung out the clamps
- To protect the holes from dust during repairs, it is better to immediately cover them with small plugs.
- To gain access to the valve itself, you will need to remove another hose that ventilates the fuel tank.
- Now you can remove the damper by first unscrewing the two mounting bolts and disconnecting the cable that connects the part to the accelerator pedal. We remove the damper by first unscrewing the two bolts
For further work, you need to decide which cleaning method you will use. For minor contamination, choose the simpler and faster surface cleaner. If the mechanism is covered with a large layer of dirt, and some elements are coked, then a complete cleaning is suitable. Surface cleaning does not require further disassembly of the mechanism. It is enough to remove oil deposits from internal and external surfaces with a rag and cotton swabs. We recommend using gasoline or thinner as cleaning agents.
Tip: Adjust the damper during cleaning to completely remove dirt from the inner surface of the mechanism.
When completely flushed, we will need to replace the gasket or o-ring. To disassemble the tool, take a small screwdriver and a 13mm wrench to unscrew two more bolts. After cleaning, mechanics recommend blowing out all the holes with a stream of compressed air - this will remove excess moisture and small dust particles.
What does the throttle valve look like before and after cleaning?
When disassembling the throttle assembly, we recommend paying special attention to the idle speed sensor. The efficiency of fuel use and the smooth movement of the vehicle depend on its correct operation.
To clean it, it is better to use WD 40 and thin cotton swabs. We remove dirt from the case and thoroughly clean the contacts of the device.
