How to adjust the carburetor on a VAZ 21043

How to adjust carburetor idle speed?

Adjusting the idle speed of carburetors 2105, 2107 Ozone and their modifications is one of the most frequently performed operations in carburetor maintenance. As a result, it is necessary to achieve stable engine operation at crankshaft speed

revolutions per minute, as well as normalizing the content of CO and CH in the exhaust gases.

Tools required for adjusting XX speed

— tachometer (you can use the one built into the instrument panel) — slotted screwdriver (3 mm) If you don’t have a tachometer, you can adjust the idle speed by ear. But for this you must have at least some experience in car repair, since it is necessary to distinguish when the speed is normal and when it is increased or decreased.

Preparatory work

Before making adjustments, you must first make sure that the ignition timing is set correctly. The distributor cover, breaker contacts, armored wire and spark plugs are in good condition.

If the carburetor is after disassembly and reassembly or you simply need to set the initial value of the adjustment screws, then first tighten them completely, and then turn out the “quality” screw by 2-3 turns, and the “quantity” screw by 3-4.

— Warm up the engine to operating temperature (85-95). — With the engine stopped, connect the tachometer and start it again.

procedure for connecting an autotester (tachometer)

Adjusting the idle speed of an engine with a carburetor 2105, 2107 Ozone We carry out the adjustment in four stages.

1. Turn the “quality” screw and set the maximum idle speed.

Rotate the screw counterclockwise.

turn the “quality” screw of the fuel mixture of the carburetor 2105, 2107 Ozone counterclockwise, thereby increasing the supply of gasoline to the fuel-air mixture

2. Use the “quantity” screw to set an even higher rotation speed. For example, 80 rpm more. Rotate the screw counterclockwise.

rotate the “amount” screw of the fuel mixture counterclockwise, increasing the total amount of fuel mixture entering the engine cylinders

3. We check with the “quality” screw whether these revolutions are the maximum for the given position of the “quantity” screw.

Simply rotating it back and forth.

We check by rotating the “quality” screw in different directions whether the set idle speed is maximum

If not, then we carry out the above adjustments again.

4. Keeping the position of the “quantity” screw of the fuel mixture unchanged, tighten the “quality” screw so much that the speed drops to 850-900 rpm.

Adjustment in this way is very simple, but at the same time convenient, since it does not require special equipment.

— whether the fuel and air jets of the main dosing system are dirty; — whether the main fuel jets of the first and second chambers are reversed; — whether the fuel level in the float chamber is increased; — Is the needle valve working? - Is the fuel jet of the idle system clogged; — whether the holder of the fuel jet of the idle system or the solenoid valve has turned away; — whether the tubes have come off the electro-pneumatic valve; — whether the rubber o-ring on the fuel mixture “quality” screw is damaged.

— In some cases, it makes sense to modify the carburetor idle system. See “Modification of the idle system of Solex and Ozone carburetors.”

Five more articles on the site on adjusting and tuning carburetors 2105, 2107 Ozone

Design, repair and operation

The smooth operation of the engine of the VAZ 2104, 2105, 2106 and 2107 family of cars directly depends on a correctly adjusted carburetor. The quality and quantity of the mixture supplied to the combustion chamber must be balanced. Otherwise, the car engine will not work stably.

Carburetors prepare the combustible mixture and distribute it evenly among the engine cylinders. There are several ways to mix fuel with air. The carburetor device can be float or needle.

Before you start adjusting the VAZ carburetor yourself, you need to understand what type is installed on your car (float, needle).

If you have a vacuum ignition corrector installed, then your car is equipped with the latest modification of the VAZ 2103 or VAZ 2106 engine. This means that the modification of your carburetor has an index of 1107010-20.

If you have a VAZ 2106 engine installed, but there is no vacuum corrector, then you have a modification of the carburetor with index 1107010-10.

Adjusting the VAZ 2104, 2105, 2106, 2107 carburetor requires knowledge of its structure and the ability to correctly identify a malfunction. Since the carburetor of a VAZ car is responsible for the stable operation of the engine, its malfunction can be determined by some signs.

engine is bad;
when you press the accelerator pedal, jerks, dips and jerks appear in the engine;
low dynamics of car acceleration;
increased fuel consumption

If the above symptoms are typical for your car, then you need to adjust the carburetor.

If you remove the carburetor cover, the float chamber protrudes in front of us. This is where you can start making adjustments. The free play of the float is 6.5 mm on one side and 14 mm on the other. The free play of the float can be adjusted using a special template placed vertically in the chamber. This will cause the float to lightly touch, but not press, the valve ball.

If the free play of the float is less than 6.5 mm, then it is necessary to carefully bend the tongue of the needle valve, marked in the figure with the letter “A”.

Next, you can begin to adjust the needle valve that supplies fuel to the float chamber. When the float rises, the fuel supply decreases, and when you sharply press the accelerator pedal and open the throttle, the fuel supply increases and the float drops.

Next, we will adjust the degree of deflection of the float in the other direction. To do this, you need to move the float as far as possible from the cover and, using a 14 mm thick template, check the distance. If the distance of the float from the cover does not correspond to 14 mm, then it is necessary to stop the float mounting bracket so that it does not exceed the required value.

After adjustment, the free play of the float should be about 8 mm. Adjusting the carburetor of VAZ 2104, 2105, 2106, 2107 also involves checking and cleaning fuel strainers and filters.

Self-adjustment of the carburetor of VAZ family cars necessarily includes setting the starting device. The starting device is used to confidently start a cold engine. In this case, the fuel mixture is several times richer than when starting a warm engine.

The carburetor trigger with index 1107010 is triggered at an engine speed of 1500 rpm. This speed is recommended by the manufacturer when starting a cold engine.

When starting a cold engine, the driver pulls the “choke” towards himself, thereby preparing the starting device. The three-arm lever is “cocked” with a cable counterclockwise, while dragging the telescopic rod, which, in turn, rotates the air damper using the lever. The second arm of the lever exerts pressure on the axis of the throttle valve 1 of the chamber. In this case, the air damper is completely closed, and the throttle valve of chamber 1 is slightly open for starting, forming a starting gap.

Carburetor VAZ

Now you need to measure the gap between the wall and the edge of the throttle valve (chamber 1). For carburetors of VAZ cars, this gap should be 0.85-0.9 mm. The gap can be measured using a calibrated feeler gauge.

In order for the gap to meet the required values, it is necessary to bend the drive rod on the throttle valve.

Next, you need to set the gap “A”. It is located in the lower part between the edge of the air damper and the channel wall:

We close the damper.
We recess the starter rod to simulate rarefaction of air.

At this time, the rod pulls the rod along the slot, as a result of which the air damper opens. Gap “A” should be 5-5.4 mm.

Before adjusting the idle speed, you must make sure that the ignition system is adjusted correctly, the engine is warm and all wires are in good condition.

We begin adjusting the idle speed, for which you need to:

Turn the fuel quality screw counterclockwise to maximum speed. In this case, the combustible mixture is enriched with fuel:

3. Using the “quality” screw, we check whether it is possible to increase the speed further?

The purpose of this operation is to reduce the quality with a regular quantity, reaching a stable 850-900 rpm.

The number of revolutions can be monitored by the tachometer on the dashboard, or by ear or using an electronic tachometer.

The VAZ 2105 “Ozone” carburetor is used to operate the engine of the “five” known to many Russians, which was produced in 1980–2010.

Experts say that it is possible to adjust the carburetor without necessarily removing it from the vehicle. A float mechanism is responsible for ensuring the required volume of fuel in the described device, which is adjusted as follows:

the engine is started and it idles for several minutes;
The carburetor cover is removed and the fuel level is measured, which should be 28 millimeters.

bending the float tongue touching the needle valve (more precisely, its ball) to a value of 6.2 to 6.75 mm;
After visual inspection, align the parallelism of the float with respect to the lower level of the cover, as well as the perpendicularity of its tongue to the axis of the valve (needle);
align the position of the bracket in situations where the distance between the float, allocated to the greatest length, and the cover gasket does not fall within the range of 13.5–14.5 mm.

bring the internal combustion engine to 850 rpm using the quantity screw;
then set the speed to maximum using the quality screw;
reduce the speed to the previous level (up to 850) and raise it again to the maximum;
turn the quality regulator at 850 rpm to the “motor shaking” position.

The carburetor cover is removed.
The current level of fuel fluid in the chamber of the float mechanism is checked (its digital indicator should ideally be 28 mm).

close the air damper (this is done using the thrust handle located in the car interior);
check the location of the rod shank, which must be at the end of the groove of the carburetor rod to start the system;
measure the gap level from the edge of the valve to the chamber wall (measurements are taken when the rod is recessed) - the norm is 5-5.5 mm.

The motor is brought out using rotational movements of the mixture quantity screw - the norm is 850 rpm:
to reduce the speed you need to rotate the quantity screw (to the desired level of 850).
Tighten the quality screw as far as it will go (rotational movements are performed until the motor stops shaking).
Unscrew the same screw in the opposite direction three turns.

screw it in as far as it will go;
Unscrew it in the opposite direction - 4-5 turns (no more).

Adjusting the throttle drive

If the car stalls frequently, then you need to pay attention to the air damper drive. To adjust it, you will need a 7mm wrench and a slotted screwdriver.

The figures below show the positions of the air damper with the choke recessed and extended.

Adjusting the air damper of the carburetor VAZ 2104, 2105, 2106 and 2107 is as follows:

We recess the suction.
Using a slotted screwdriver, unscrew the screw securing the rod (the spring sets it vertically).
Tighten the screw.
We check the movement of the air damper.

If you feel that the engine response is extremely low, and the acceleration dynamics leave much to be desired, then we recommend that you pay attention to adjusting the throttle valve drive, in other words, the “gas” drive. It is better to use a partner in this adjustment.

The tools we need are a screwdriver, a flashlight, a caliper and a 8mm wrench.

Turn down the choke completely or close the air damper.
Next, the partner must fully depress the gas pedal all the way to the floor. In this case, the air damper should open completely, as shown in the figure below. After releasing the gas pedal, the damper should close completely without any residual gaps.
Using a caliper, we measure the length of the rod - it should be eight centimeters. For traction, it is adjusted by rotating the tips, having previously unscrewed the lock nuts.
We put the rod in place and re-check the degree of opening of the air damper using the gas pedal.

In this article, we described to you how to independently adjust the carburetor of a VAZ 2104, 2105, 2106, 2107. We hope that our article was useful to you.

If you don't take care of the drive, the car may stall. To do this, you will need a simple Phillips screwdriver and a 7 mm open-end wrench.

The positions of the damper are shown above with the “suction” extended and recessed.

To adjust the drive, do the following:

drown the “suction”;
Unscrew the rod fixing screw with a screwdriver (the spring will push it out vertically)
Tighten the screw;
Check the valve stroke.

If this drive is incorrectly configured, the car's engine response drops and acceleration dynamics deteriorate. The setup is done with an assistant.

You will need the following tools: a screwdriver, an 8-mm open-end wrench, a flashlight, a ruler or a caliper.

Turn down the “choke” (air damper drive) completely.

Have your assistant press the gas pedal all the way to the floor. The throttle valve will open completely, as shown in the picture below, you can shine a flashlight into the first chamber. When you release the pedal, the damper should completely close the first chamber without any gaps. If there are gaps, then proceed to the next step.

Next, we measure the length of the rod with a caliper; it should be exactly 8 cm. To adjust the length of the rod to the required size, rotate the tips by unscrewing the lock nuts.

After all these operations have been completed, put the rod in place and repeat the check. Nowadays, rods are made of low-quality plastic, which shrinks over time. Therefore, you need to check the operation of the traction after a week or two.

We looked at all the ways to adjust the carburetor yourself. We hope this article helped you, if you have any questions, ask them in the comments and we will definitely answer.

When is adjustment needed?

Adjusting the carburetor unit is no more difficult than adjusting the clutch drive on a VAZ 2107 , since it only involves adjusting the jets. In some cases, they need to be cleaned of resins and other contaminants; the presence of contaminants is felt by power dips in the process of accelerating. Many car owners claim that Ozone carburetors are not a very good option and recommend replacing them with Solex.

However, the signs that the device has begun to prepare an enriched mixture and needs to be adjusted are the same for both types of units:

Increased fuel consumption.
Frequent overheating of the motor.
Black smoke from the exhaust pipe and pops.
Loss of power.

The preparation of a lean mixture is characterized by the following characteristics:

Popping sounds in the carburetor.
Loss of power.
Engine overheating.

Of course, you don’t always need to immediately grab a screwdriver and turn the adjusting screws - perhaps it’s something else. For example, when the idle speed floats, air may leak through the intake manifold gasket, or there may be a breakdown of the brake booster diaphragm. But even the reasons listed are not all the options, so specific recipes for eliminating certain problems cannot be given. The issue should be addressed comprehensively, taking into account the connection between vehicle systems.

The second stage - we adjust the starting device of the VAZ-2105 carburetor

On the fifth model Zhiguli we are interested in, the main power unit is a four-stroke four-cylinder internal combustion engine with a volume of 1.45, 1.29 and 1.57 liters.

The most commonly installed models were 2105-1107010-20 and 2105-1107010-10. Their difference lies in the size of the cross section of the two elements:

additional pipe;
fuel main jet located in the primary chamber.

Carburetors of these modifications have five main mechanisms:

econostat system;
dosing main chamber;
system for starting a cold engine and warming it up;
accelerator pump;
idle system;
system responsible for maintaining the required level of gasoline.

The VAZ 2105 carburetor jets are marked as follows:

2105-1107010-10. Air jet: main system - 170 for the first and second chambers, idle speed - 170 and 70, respectively. Fuel: main system - 109 and 162, idle - 50 and 60. Accelerator pump: 40 (bypass and fuel).
2105-1107010-20. All markings are similar to the previous model, with the exception of the fuel cell of the main system - 107 (in 2105-1107010-10 marking 109).

In general, the “five” carburetor is a rather complex device that ensures stable operation of the car engine in different modes, mixes vehicle fuel and air in a given proportion, and then supplies the resulting combination to the cylinders of the power plant. Its correct setting guarantees economical fuel consumption and stable operation of the “heart” of the car.

The process of adjusting the VAZ-2105 carburetor is a simple task that can be completed by any car owner who knows the device and the sequence of necessary operations. The principle of operation of a carburetor is to create a fuel-air mixture by mixing gasoline with oxygen and then feeding it into the combustion chamber.

Today in the car market, carburetor engines are in less demand than injection units. This is due to the trend created by world leaders in the field of mechanical engineering. They offer a new filling with a wider range of capabilities and improved characteristics. However, carburetors have a number of advantages that make them most effective in certain situations.

Only they can ensure successful engine starting the first time in the most severe frosts. A small volume of vapor is retained in the inlet manifold, which allows you to start the engine on the first try at low temperatures. Also, on domestic VAZ-2105 cars there is a choke. With its help, the fuel system is enriched, the concentration of the combustible mixture is increased, thanks to which the engine warms up much faster.

Useful tips

Valve position. It must be pushed in so that the idle jet touches its connector (seat) in the device body. To do this, it is recommended to lubricate the rubber seal with engine oil.
The position of the air damper of the cold pass system, with the choke handle lowered, must be in a strictly vertical plane.
When the quality adjustment screw is screwed in all the way, the engine should stall. If this does not happen, the reason may be incorrect adjustment of the VAZ-2105 carburetor. Using the appropriate bolts, you need to change the speed up.
Vacuum in the tube between the carburetor and the ignition distributor. When the engine is idling, there should be no vacuum in the vacuum tube. The reason for its occurrence may be a tightly tightened locking screw of the throttle valve. Adjustment of this element is carried out using a locking screw. In the correct position, the damper does not jam in the diffuser and provides sufficient tightness. When 2-3 cm 3 of fuel is poured into the chamber, it should not noticeably leak through the valve. When you press the gas pedal, it moves smoothly without jerking. An identical method is used to test and adjust the damper on the second chamber, with the exception of the tube, which is only in the first chamber.
Solenoid valve. In carburetors designed for engines with a displacement of 1500 cm 3 or more, in place of the holder of a conventional fuel jet there may be an electromagnetic valve with an XX jet. If it is included in the design of the device in question, it is necessary to check its functionality and ensure the integrity of the electromechanical element. With the ignition on, you need to remove and put the connector on the valve. The occurrence of clicks during these operations will indicate the serviceability of the part being tested.
For the summer season, it is recommended to reduce the idle speed to 800-900 units, and in winter to increase it to 900-1000 rpm. This setting will improve the efficiency of the power unit taking into account climatic conditions.

The carburetor on any vehicle is one of the components of the fuel system of an internal combustion engine. It mixes air with fuel liquid, and this mixture is supplied to the cylinders of the internal combustion engine. As you can see, this automotive part plays a very important role in the functioning of the vehicle as a whole. Therefore, the carburetor must be adjusted periodically. You will learn how to do this correctly on a VAZ-2105 from this article.

Experts immediately warn inexperienced car enthusiasts: if you don’t know where the carburetor is located in the car and what it consists of, then you shouldn’t even start adjusting. By incorrectly changing the parameters of the fuel system, the entire vehicle can be damaged. It is best to entrust this procedure to qualified auto mechanics from a service station.

So, to begin adjusting the carburetor of a certain vehicle model, you need to study its structure. Thus, the VAZ-2105 carburetor contains several important systems:

dosing;
starting and warming up the engine;
maintaining an optimal level of fuel fluid;
starting idle;
econostat system;
accelerator pump.

Three of all the listed systems are subject to standard adjustment:

Starting and warming up the internal combustion engine (the starting device is configured).
Maintaining the fuel fluid level (the float mechanism is adjusted).
Idle speed (speed calibration is performed using a specific screw).

check the distance from the cover gasket and the float itself (this is done at the moment the needle valve ball comes into contact with it) - the norm is 6.5 mm (-0.25 mm);
bend the tongue;
check the maximum stroke of the valve needle - the norm is 8 mm;
check the distance from the cover gasket to the maximum retracted float - the norm is 14 mm (-0.5 mm).

If the indicators do not meet standard standards, they can be adjusted using a bracket. If the optimal level of fuel fluid in the float chamber was not obtained after adjustment, the needle valve will have to be replaced.

Useful tips

Useful tips

Valve position. It must be pushed in so that the idle jet touches its connector (seat) in the device body. To do this, it is recommended to lubricate the rubber seal with engine oil.
The position of the air damper of the cold pass system, with the choke handle lowered, must be in a strictly vertical plane.
When the quality adjustment screw is screwed in all the way, the engine should stall. If this does not happen, the reason may be incorrect adjustment of the VAZ-2105 carburetor. Using the appropriate bolts, you need to change the speed up.
Vacuum in the tube between the carburetor and the ignition distributor. When the engine is idling, there should be no vacuum in the vacuum tube. The reason for its occurrence may be a tightly tightened locking screw of the throttle valve. Adjustment of this element is carried out using a locking screw. In the correct position, the damper does not jam in the diffuser and provides sufficient tightness. When 2-3 cm3 of fuel is poured into the chamber, it should not noticeably leak through the valve. When you press the gas pedal, it moves smoothly without jerking. An identical method is used to test and adjust the damper on the second chamber, with the exception of the tube, which is only in the first chamber.
Solenoid valve. In carburetors designed for engines with a displacement of 1500 cm3 or more, in place of the holder of a conventional fuel jet there may be an electromagnetic valve with an XX jet. If it is included in the design of the device in question, it is necessary to check its functionality and ensure the integrity of the electromechanical element. With the ignition on, you need to remove and put the connector on the valve. The occurrence of clicks during these operations will indicate the serviceability of the part being tested.
For the summer season, it is recommended to reduce the idle speed to 800-900 units, and in winter to increase it to 900-1000 rpm. This setting will improve the efficiency of the power unit taking into account climatic conditions.

What's the result?

Taking into account all of the above, it becomes clear that even with the relative simplicity of the design, the carburetor still needs timely additional care. To maintain the cleanliness and performance of the device, some experts recommend cleaning and adjusting the carburetor at least twice a year. It is recommended to do this in the off-season, that is, before the onset of severe frost or heat. This measure allows you to maintain fuel consumption at an optimal level.

If noticeable dips are noted when pressing the gas pedal, then, in parallel with cleaning the carburetor itself, remove the carburetor cover, after which you need to pay attention to the accelerator pump nozzle. This element should be thoroughly cleaned using a carbicleaner; additionally, you can blow it with air under pressure from a compressor.

In other situations, it is better to disassemble and clean the dosing device at the first opportunity. This statement is also true if the carburetor is very dirty for some reason or has never been cleaned before.

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