Is it worth making a larger diameter throttle body?

The throttle body on the engine is the body that controls the air flow in the engine according to the amount of fuel that is also dumped into the engine. The throttle valve opens when the gas pedal is depressed, allowing more air to enter the engine and also increasing fuel consumption. There are two variable diameters on the throttle body. The first diameter is the diameter of the inlet hole, and the second is the diameter of the throttle body hole. The location of the throttle body will vary depending on vehicles.

Inlet diameter measurement

Symptoms of pollution

These include:

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.

Tools and materials:

Key "13" for removing the throttle assembly

Set of screwdrivers for work

Carburetor cleaner

Ear sticks that can be used to clean the flap

Throttle assembly gasket

1. Screwdriver Set.
2. The key is "13".
3. Rags (you can take ear cleaning sticks).
4. Pad.
5. Flushing liquid.

Practice. Effect

Unfortunately, I myself forgot to measure the acceleration “before and after”. But on the well-known YouTube site I found a video of one guy who was just doing this procedure. At first he had a completely stock VAZ-2112 coupe. Acceleration from zero to 100 km/h was around 11.9 seconds. Then he installed a larger throttle (56mm) and it turned out that the acceleration from 0 to 100 took one second less than before, namely 10.9 seconds.

So, let's figure out what are the advantages of this tuning. Firstly, there are no difficulties during installation; it is installed in place of the standard one without any modifications. Secondly, the response to the gas pedal has become more responsive. Thirdly, low price. Fourthly, this tuning does not require any sports brains or tuning.

Disadvantages of a large throttle:

• I personally had troubles with XX (idling speed);
• twitching appeared at the “bottoms” (low revs);
• the car begins to respond more sharply to small movements of the accelerator pedal, as a result, comfort in the cabin disappears and fuel consumption increases.

Conclusion: this spare part is needed by those who “chase power.” Who cares about horses under the hood rather than comfort? Such tuning will not appeal to a careful driver who is used to driving quietly and calmly.

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1. The car becomes more playful.
2. Problems with idle speed disappeared.
3. The gas pedal becomes more responsive.

There are also disadvantages:

1. Fuel consumption according to the BC increases and supposedly the readings are incorrect, the consumption has not changed.

Other owners of “ten” cars see the effect only at 16kl. motors.

In fact, the picture described above may be presented somewhat differently. The positive effect that many people notice when installing a larger diameter throttle body is due to the fact that the old throttle body needed cleaning and the engine was not working properly. After installing the new remote control, the motor begins to operate normally, which was presented as a “new breath”. In other words, the car would become more playful and the pedal more responsive after basic cleaning of the remote control.

In addition, after installing a remote control with a large diameter, new problems appear in the operation of the engine that did not exist before. This is due to the fact that the ratio of gasoline and air is violated, and the ECU is unable to correct it. Instead of returning the throttle assembly to the standard diameter, many decide to replace the firmware.

Many people take the position that a 52, 54 or 56mm remote control is a useless thing, but if it is installed in conjunction with another engine tuning, the effect will definitely be noticeable. However, it is not clear whether this effect will be caused by the remote control or by other modifications to the motor. After all, even with a turbo engine the power of which is no more than 200 hp. They leave the standard 46mm throttle valves, and they are quite enough.

What feedback can you leave about the 52, 54 or 56mm throttle assembly?

Is there any benefit to a 52, 54 or 56mm throttle body?

Source

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.

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Which is better, a mechanical or electric damper?

Arguing about which system is better is a thankless task. Depends on what the car owner’s priorities are.

For example, a mechanical throttle can be considered “last century”, since it is not installed on modern cars, but at the same time it perfectly performs its functions. And it has clear advantages: fewer weak points (each additional sensor or motor is an additional part that can break) and ease of repair or replacement. However, let's be honest, a mechanical damper can no longer cope with today's standards of fuel economy and environmental safety.

An electronic throttle has a greater chance of failure, even purely statistically, because it contains additional elements. As soon as any sensor fails, “dancing with a tambourine” and searching for errors begin. However, it is simply impossible to imagine a modern car without precise and subtle engine control, which requires an electronic damper. Therefore, mechanical throttles are slowly becoming a thing of the past, and they are being replaced by electronics.

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.

Many VAZ-2109 and VAZ-2110 owners succumb to persuasion and replace the standard device with an improved one. After this, indeed, the engine works better and the car drives more dynamically. The reason for the improvements actually turns out to be much more prosaic: instead of the old, dirty throttle body, which had long been in need of thorough cleaning, the owner installed a new one. As a result, the engine returned to normal operation, which is perceived by the owners as the promised responsiveness and agility of the car.

Throttle valve device

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:

1. mechanical, like VAZ-2109, VAZ-2110, VAZ-2114;
2. 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.

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.

According to the recommendations in the operating manual for the domestic ten, the damper should be cleaned after every 50 thousand kilometers traveled. If you clean it in a timely manner, the throttle will last much longer and there will be no problems with the operation of the power unit.

Signs of contamination

Problems with the throttle valve can be identified by characteristic symptoms.

Signs	Explanation
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
The engine is difficult to start when cold and even when operating temperature is reached	To start the engine normally, you need to turn the starter for a long time. You can identify the problem by smell. The characteristic aroma of unburned fuel will come from the exhaust pipe. Try pressing the pedal all the way down several times. This will open the throttle fully, air will flow in, and the engine will start. But in the first few minutes the engine will still stall

Troubling the motor is a rather indirect sign, since this is how the engine can behave in various types of failure. But don't rule out problems with the throttle.

Cleaning procedure

In most cases, surface cleaning will help if the contamination is not significant. The spray is used to clean carburetors and injectors.

The process for cleaning the VAZ-2110 throttle valve (injector) is as follows:

1. Remove the corrugation from the air filter and throttle valve.
2. Apply the solution from a spray can to the valve.
3. After 5-10 minutes, remove dirt with a brush or clean rag.
4. Repeat cleaning if the dirt is not completely removed.

To completely clean the throttle valve of the VAZ-2110, you will need to dismantle it. When carrying out repairs, it is advisable to install a new O-ring and gasket. Cleaning procedure:

1. Disconnect the negative terminal from the battery.
2. Dismantle all pipes going to the throttle assembly.
3. Unscrew the two bolts securing the damper. Remove it for further cleaning. Pay attention to whether the gaskets and o-rings are damaged and what condition they are in.
4. Do not damage the sensors during dismantling. Remove them carefully, being careful not to destroy the housing and power wires.
5. Spray all surfaces of the assembly, grooves and holes with an aerosol. Wait until the product gets into all hard-to-reach places.
6. Wipe the body with a brush or rag. If necessary, repeat the procedure several times. This will allow you to clean the body and internal surfaces as efficiently as possible.

The platinum thread in the air flow sensor often becomes clogged, dust settles on it and interferes with normal operation. It is possible to clean the thread and grill using an aerosol. But you should not touch it with your hands or foreign objects - this will lead to disruption of the sensor. To prevent contamination of the fuel system, change the fuel and air filters promptly. The less dust gets into the mixture, the longer the fuel system elements will last - the VAZ-2110 throttle valve, injectors, air flow sensors, pressure sensors, idle air control.

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.

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

Removing the throttle on a VAZ 2110

So that you do not constantly run for the necessary tool, it is better to say in advance that to perform this procedure you will need the following:

• screwdriver with Phillips and flat blade
• 13mm wrench, or rather a socket head with a ratchet handle
• pliers if necessary

First of all, we open the hood of the car and unscrew the clamping screw of the inlet pipe - this is the same thick corrugated “hose” that goes from the air filter housing to the throttle assembly.

And also the second one - from a thinner hose that comes from the pipe:

Now you can slightly move the pipe to the side so that later, when removing it, it does not interfere with us:

Next, unscrew the three screws that are marked in the photo below:

And the fourth one, which is located below:

If for some reason the upper hoses are difficult to remove, you can use pliers, being very careful not to damage the hose.

Then you need to disconnect the plugs with power wires from the throttle position sensor and the idle speed control. This is clearly shown in the photograph below; more precisely, the result is already visible:

And all that remains is to unscrew only two nuts securing the throttle assembly to the receiver, as shown in the photo below:

We move it to the side and the assembly is removed without any problems:

And there are a couple more points - this is disconnecting and removing the throttle control cable. Everything is quite simple here:

1. We remove the cable fixing bracket by prying it with a flat screwdriver
2. We remove the cable from its engagement with the damper, turning it to the required torque

Cleaning Rules

Before removing and cleaning the throttle valve, you need to buy a special cleaner for it. There are many manufacturers, there is enough choice. Among the inexpensive ones, Abro is effective.

1. You need to remove the engine cover (decorative plastic);
2. Reduce the pressure in the cooling system by unscrewing the expansion tank cap;
3. Loosen the clamps and remove the hose from the forced ventilation air pipe;
4. Use a screwdriver to remove the heating hoses for the remote control (it is advisable to plug them for now);
5. Disconnect the cable and unscrew the fastening nuts. Now removal of the throttle assembly is possible;
6. Use a cleaner to wash everything very thoroughly. Most often, it is necessary to use a needle to check whether the forced ventilation channel is coked, and also to clean it;
7. Cleaning is necessary for the idle air regulator, for which it must be removed and inspected. If you find that it is jamming and adjustment is impossible, then it needs replacement;
8. After washing, reassemble everything as it was. Please make sure that the gasket is intact and in good condition, then you can leave it. If this is not the case, then only replacement.

Assembly

Installation of the remote control is strictly in the disassembly sequence, only in reverse. A cleaned remote control unit makes engine operation stable at idle, and the engine speed no longer fluctuates. There is a clear response when the gas pedal is operated. Additionally, the throttle assembly may need to be modified, but first study the video on such modifications.

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.

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

1. Disconnect the connectors of the sensor that regulates the position of the throttle valve, its drive cable and the XX regulator;
2. We partially drain the coolant;
3. 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;
4. 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;
5. Having loosened the clamp, remove the hose of the 1st crankcase gas exhaust circuit from the throttle assembly fitting;
6. Having loosened the clamps, we remove the hoses supplying and discharging coolant;
7. 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;
8. It is now possible to remove the throttle assembly from the studs;
9. 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.

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.