Niva carburetor: we set up and repair it ourselves

The carburetor on models 2121, 21213 and other cars has basically the same device. Functionally, it is located in the propulsion system, and with its help the fuel is mixed to the state of a combustible mixture. A carburetor, as a rule, consists of several main elements - a float chamber, a so-called jet (with a spray), a diffuser, and a throttle valve. It can have from one to four cameras on different cars, sequential or simultaneous opening of the throttle valves, horizontal, downward or upward movement of the working mixture.

What kind of carburetor is installed on the Niva initially?

The Niva car is equipped with carburetors from the classic “Ozone”, which is not the best two-chamber unit with an idle economizer.
The economizer is an autonomous system with a solenoid valve that automatically comes into operation when the ignition is turned on. When the speed increases above 1000, it is turned off, and the engine is maintained using an air damper.

The updated model received the French Solex design. The 1.7-liter engine required an increase in the amount of air-fuel mixture, and therefore Ozone was no longer used.

We adjust the speed on the VAZ 2101-VAZ 2107

Check out the photo below:

Note! The photo shows the screws that carry out the adjustment. They are located deep in the carburetor throttle body, so the screw under the number “1” is not visible in the image. On some cars, bushings are pressed onto both screws, thanks to which the screws can only be turned half a turn. If the bushings prevent the idle speed screw from turning properly, remove the screws and break the bushing heads. Wipe off the remaining broken bushings and screw the screws in their place.

Which Carburetor is Better to Put on Niva

Which carburetor is best to install on the field?

21213

More than fifty years later, the Russian auto industry continues to firmly hold its favorite position in the automotive market. The VAZ family has a very reasonable price and is quite standard in service.

There was great demand for the Russian VAZ-21213 jeep and its analogues. This type of VAZ car has achieved great success in world motorsport, setting unattainable records. Working with wag-com; battery management; decent taxi fleet; THE USSR; Photo; how to sheathe a roof profile; what tires to put on the field in winter; Daewoo Winstorm max. Chevrolet Front Hub. This car model is very intensively exported to European countries and beyond.

Motorists who do not have much experience in servicing this type of car often encounter various problems associated with the operation and repair of Niva. One of these common problems is carburetor repair and replacement.

Many drivers do not know which model is better

choose how they differ and how to manage them when choosing one or the other.

Often the carburetors on different Niva models are very similar and located in the same way. They are located in the drive system and create the desired fuel mixture of fuel, combining fuel with air, and supply it to the engine. The carburetors ordered are also identical. Key elements include:

1. Float chamber (jet).
2. Diffuser.
3. throttle

Depending on the car model, the carburetor can have from 1 to 4 chambers; the flaps can be opened alternately or immediately; The movement of the flammable consistency can be horizontal, downward or upward.

Inexperienced motorists can use a carburetor diagram, which will list all the parts and describe their positions and functions. It will be much easier to find and change a specific part.

Niva 21213 replaced the previous VAZ-2121 and became more sophisticated and refined. The updated model has:

• 1.7-liter engine, the founder of which was the engine from the Russian “six”;
• five-speed gearbox;
• 
  Solex carburetor
• contactless ignition using a microcontroller.

To always be confident in your car, you need to thoroughly know all its “inner money”, understand its features and understand its details. Later in this article we will look at the design of the Niva 21213 carburetor in order to have an idea of ​​this part and learn the intricacies of its operation.

53 No worse, maybe even better 73 per car 21 213 1.7 l

Carburetors on a world map near you! Purchase of nails.

Does he want something NIVA?! (About choosing a carburetor)

In this video, Nil Poroshin talks about which carburetor

NIVA
5 doors !

Carburetor in field 21213 what I put

Initially, when the VAZ 21213 was designed and manufactured by the manufacturer, it had a carburetor

Ozone brand.
In 1994, the manufacturer decided to update the Niva. In addition to the engine and other parts, it was replaced carburetor . Car owners still argue about which division is better Niva owners have varying opinions, and each type of carburetor does have many pros and cons. which model of the unit is better
.

The ozone has an old switch installed, but there is no vacuum masker. Solex does not have a microswitch on the economizer, which negatively affects the cleanliness of the exhaust and fuel consumption. Both types of carburetors have both pros and cons. But VAZ engineers preferred Solex as a more modern model. However, many car owners often complain about this type of carburetor due to its malfunction. Experts believe that this may be due to poor quality gasoline. Also sometimes the reason is the need to replace the fuel or air filter. In addition to the proper operation of the carburetor, it and its entire ventilation system must be regularly cleaned of oil contaminants. Some Niva drivers with Ozone installed are automatic Solex carburetors Most people agree that this has a positive effect on the performance of their vehicles.

regulation of VAZ-21213 carburetor

Sometimes adjustments can solve most problems and change the carburetor

no need. While driving, you may try to adjust the device while driving, feeling immersed, unsteady at idle. Knowing the fuel consumption for such tasks will be an additional advantage. Carburetor tuning work on a VAZ-21213 can be done independently without the help of a mechanic. This work will be no more difficult than tuning a VAZ-2121.

Car owners distinguish between two methods of regulation:

1. The carburetor
   must be removed .
2. This can be adjusted without removing parts.

Of course, the second method is better for car owners. It will take less time and hassle.

Remove the air filter first, but let the car run for a few minutes before doing so. You can then remove the fuel hose and remove the carburetor cap. Then use a caliper to measure the distance between the beginning of the float chamber body and the fuel level. Indications that correspond to the norm. 24-25 mm. If the data does not meet the standard, the float arm should be bent. Probably, such manipulations will need to be performed several times until you achieve the desired result. Every action is controlled by distance measurement. When the readings return to normal, the carburetor and turned around.

Next, adjust the engine to idle speed. For this you need a quality screw

Unscrew the mixture completely, then unscrew it 4 turns.
Start the engine, turn on the lights and cooler. The suction handle is completely recessed. The speed should be up to 800 per minute. Then raise it to the maximum and lower it again to 900. We do this while the motor is not running. At this point, the quality screw is turned 1 turn and with its help we reach the desired level. In summer it should be about 800-900, in winter. 900-1000 rpm.

Operating principle of the main dosing chamber

Under the influence of vacuum that occurs in the engine cylinders, air is drawn through the filter. Next, oxygen is supplied to the first chamber. It passes through diffusers. Due to the fact that the air flow speed has increased, an even greater vacuum is created in the nozzle area.

Under its action, the fuel rises from the emulsion well from the atomizer. At the same time, air passes through the air nozzle into the emulsion tube and is then mixed with fuel. As a result, an emulsion is formed, which is sucked at high speed into the carburetor channels, where it connects with the air flow. The installed Solex 21073 carburetor on the Niva operates on this principle. Its design may vary depending on the modification. But the principle of operation of the systems is approximately the same for all devices.

Carburetor repair for dips and jerks

Carburetor repair may be necessary if the engine idles unstable, and adjusting the quantity and quality screws does not always help. Often the reason lies in over-enrichment of the mixture, which may be a consequence of incorrect adjustment of the float system or malfunctions in the vacuum economizer system for power modes. In the latter case, a torn diaphragm may need to be replaced or the economizer valve through which fuel is leaking may need to be repaired.

Model 2121 may cause jerking, swaying or dips when moving. In this case, there may be several reasons for their occurrence, which may require carburetor repair to eliminate them. Dips that appear when the throttle valve is slowly opened are often associated with clogging of the idle jet. Here it is necessary to adjust the fuel level and check the level of clogging in the main fuel jets.

If the car gives a deep failure when trying to open the first or second throttle chambers, then in addition to clogged nozzles, the reason may be poor installation of small diffusers in the corresponding sockets.

When the Niva 21213 gives slight twitches at low and medium speeds and accelerates sluggishly, it may be due to poor fuel dosage on the shut-off valve side due to its wear. In this case, repairs are needed in terms of replacing the shut-off valve with a shut-off needle made of metal with a valve that has this needle made of a different material.

Cars of the 2121 series sometimes give failures when any sudden opening of the throttle valves, which then disappear within 5 seconds when the engine is running at the same pace. Often such problems are associated with a malfunction of the accelerator pump, which leads to a lack of or an incorrect drop in gasoline flows. A similar situation can result from a diaphragm rupture, a rubber O-ring on the sprayer holder being destroyed, or the lower part of the valve being destroyed.

Troubleshooting

Car components do not last forever, and sometimes the installed Solex 21073 carburetor on the Niva fails. Repairing it must begin with diagnostics. It may be possible to get by with a simple adjustment. So, during operation, solid particles can enter the carburetor, which ultimately causes clogging of the jets. Low-quality gasoline leads to the formation of deposits on the walls of the channels in the device. This significantly reduces their cross section. Failure of carburetor systems can be diagnosed by the following symptoms:

• Increased fuel consumption.
• Difficulties in starting the engine. Reduced power and dynamic performance.
• Unstable operation at idle.

Reviews about installing other carburetors on Niva 21213

Reviewed by: Ssan40

Main dosing systems

The first and second chambers are equipped with diffusers. There is one large and one small element. Spray devices are also made together with small diffusers. The latter are connected through channels to the emulsion wells, and they communicate through one channel with the float chamber. To ensure that gasoline flows in certain portions, the main fuel jets are located below in the emulsion wells. These same wells have special tubes. Each of them is equipped with an air jet at the top. Air is supplied to them from the neck of the device.

Do-it-yourself VAZ 2121 carburetor repair

Repair of the carburetor unit on the Niva may be required in different cases. If a car enthusiast has practical skills in servicing his “four-wheeled friend,” then performing repair work independently will not be difficult for him. However, it should be noted that the design of carburetor mechanisms is highly complex, so high-quality work without preparation is unlikely.

Signs and causes of malfunctions of Ozone carburetors

External manifestations of the operation of the engine unit and the driver’s own sensations, as a rule, may indicate the occurrence of any malfunctions in the operation of the carburetor. The most common signs of malfunctions on Ozone are:

unstable operation of the power unit at idle;

the car loses its dynamics;

after reaching a speed of 90 km/h, engine productivity drops sharply;

difficulty starting;

increase in fuel consumption.

Thus, if Ozone shows one or more of these signs of malfunction, this means that repair work is necessary.

Video: carburetor starter repair

The engine receives too much gasoline - the carburetor is flooded / the needle is stuck

If a car owner notices that the carburetor is constantly being filled with excess gasoline, we can conclude that the needle valve is faulty. Over time, it can lose its throughput, which is why at first there are difficulties in starting the engine, fuel drips appear on the carburetor, and then it will be impossible to start the engine at all.

The way out of the situation is to replace the needle valve yourself. To do this you will need:

Remove the cap from the carburetor.

Align the float along its original axis.

Disconnect the needle valve.

Screw a new valve into the vacant space.

Screw the lid into place.

The car cannot maintain idle speed and immediately stalls

In this case, the economizer will need to be replaced. Most likely, the reason lies in this component, since it ensures the supply of fuel to the engine at idle. In rare cases, the idle speed control unit on Niva carburetors may fail.

To determine the cause of the malfunction, it is recommended to disassemble the carburetor and inspect the economizer and idle devices. Their condition will be visually noticeable (adhesion of a large amount of soot and dirt, deformation). If devices fail, the procedure for replacing them is as simple as possible: a new one is installed in place of the old component.

Adjustment

If the installed Solex 21073 carburetor on the Niva fails, repairs and adjustments help bring the device back to life. The settings allow you to restore optimal modes in which the motor will operate as efficiently as possible. Fuel consumption is at an average level. First of all, start the engine and warm it up a little. Next, you need to remove the fuel hose and the device cover. It is recommended to remove the latter with extreme caution so as not to damage the float. Next, using a measuring tool, measure the distance in each of the carburetor chambers. Measure from the mating surfaces to the edge of the fuel. This size should be approximately 24 mm. If this distance is less or more, then it is adjusted by bending the float. Then you need to start and warm up the engine again. When the level adjustments are successfully completed, you can proceed to adjusting the idle speed.

The engine is turned off. To set up, you will need a flathead screwdriver and a little time. There is a hole on the base of the device in which there is a screw that regulates the quality of the fuel mixture. It is twisted all the way. Then from the extreme position the same screw is unscrewed by about five turns. Then the engine is started. There is no need to use a suction. If you unscrew the “quality” screw, then the carburetor will change the engine speed. Then it is twisted again. It is required to rotate until the operation of the motor is stable and stable. When the engine starts to run smoothly, then the element is unscrewed no more than one turn. As a result, the idle speed will be set at 900. If the engine starts to stall, it is better to slightly increase the idle speed.

VESKO-TRANS.RU

AutoNews / Reviews / Tests

Which Carburetor to Put on a VAZ 2121

Which carburetor

better
put it on Levels 2121

Niva 2121 , or VAZ-2121 is considered a small-class SUV, which has a supporting body and permanent all-wheel drive. The first model of this car had an engine with the same markings. VAZ-2121. I entered his package and the Daaz 2107-20 or “seven by twenty” carburetor If this doesn't work, is it best to use a Niva 2121 carburetor from modern models?

Engine 21213 (1.7l 79hp)

ENGINE VAZ 21213-1000260.

How to adjust the Solex carburetor
CHARACTERISTICS OF THE VAZ 21213 ENGINE.

The engine is carburetor, the camshaft is located on top.

Cylinder displacement:

Power at a crankshaft speed of 5200 rpm:

Minimum crankshaft rotation speed rpm:

Maximum torque at 3400 rpm:

Cylinder operating order:

Octane number of gasoline:

Fuel supply system:

Engine Features.

The VAZ-21213 engine is installed on Niva-2121, 21213, 21214, 2131 (long Niva) cars; VAZ -2120 Nadezhda

Designed specifically for Niva-21213.

Engine cylinder block 21213-1002011 with a center-to-center distance of 95 mm and a height of 214.58-0.1 mm (distance from the axis of rotation of the crankshaft to the upper surface of the block). The cylinder diameter is 82mm. (repair sizes of cylinders - 82.4 and 82.8) Cylinders come in five classes A, B, C, D. The size of each class differs from the previous one by 0.01 mm. The cylinder block markings are located on the bottom surface.

Crankshaft 21213-1005015 corresponds to the crankshaft of the VAZ-2103. The shaft has additional counterweights that reduce vibration. There are two oil supply holes on each connecting rod journal. The diameters of the shaft journals are increased by 0.02 mm. When using standard bearings, this reduction in clearances optimizes the thickness of the oil layer between the shaft journal and the bearing surface. Crankshaft 21213 is recommended for installation instead of shaft 2103.

New piston group. Piston 21213 has a special oval hole on the bottom. Hole for piston pin D=22mm. The hole in the piston for the pin is offset by 1.2 mm from the piston axis. Piston pin length 67mm Piston weight - 347g. Connecting rod 21213-1004045. Connecting rod length 136 mm. Hole sizes: for the crankpin - 47.8mm; under the piston pin – 22mm.

Cylinder head 21213-1002011 (1.7 l.) Cylinder head height 21213 - 111.0 mm (1.8 mm lower than head 21011) Combustion chamber size - 81x52 mm, volume 30 cm3.

• Camshaft 21213-1006010. The shape of the cams has been changed to increase the intake valve stroke.
• Valves and valve mechanism from the VAZ-2101 engine.
• Timing chain 2103. Extended tensioner shoe.
• Carburetor 21073 SOLEX.
• BSZ ignition system (non-contact ignition system): Ignition distributor (distributor) 3810.3706 (21213-3706010) or equivalent 2107.3706.010-21. Switch - 3620.3734 SOATE or 133.3774-01 (2108) Ignition coil - 27.3705 (2108)

Source

Which carburetor is better to install on Niva 21213

The domestic auto industry, after more than fifty years, continues to firmly hold a leading position in the car markets.
The VAZ family has a very reasonable price and is quite easy to maintain. Huge demand has appeared for the Soviet SUV VAZ-21213, as well as its analogues. This type of VAZ car has achieved enormous success in world motorsport, setting unattainable records. This type of car is very actively exported to European countries and beyond.

Car owners who do not have much experience in servicing this type of car quite often encounter various problems associated with the operation and repair of the Niva. One of these common problems is carburetor repair and replacement.

Many drivers do not know which model is better to choose, how they differ from each other and what to follow when choosing one or the other.

Often, carburetors on different Niva models are very similar and are designed in the same way. They are located in the engine system and make the necessary combustible mixture from the fuel, mixing fuel with air, and supplying it to the engine. Carburetors are also designed in the same way. The main elements include:

1. Float chamber (jet).
2. Diffuser.
3. Throttle valve.

CXX

When the power plant operates at low speeds, the damper closes almost entirely. In this case, the diffuser vacuum drops to such an extent that the supply of fuel from the gas pressure zone stops.

At XX, to prepare the fuel assemblies, the air hose zone under the diesel protection is put into operation, and the fuel is supplied by a separate part of the carburetor.

Idle system

Fuel liquid enters through nozzles from the float chamber. Air is mixed with it, sucked through a separate jet. As a result, a normal fuel mixture is supplied, capable of powering the internal combustion engine.

CXH is often called an autonomous system, and rightly so. Its influence on the main characteristics of internal combustion engines is well known. Many people think that CXX is the most simplified carburetor system, however, in fact this is not the case. It is with idle speed that problems and abnormalities often arise, requiring the motorist to intervene and adjust the screws.

The CXX operates when the damper of the first chamber is completely locked, when the GDS is turned off. It turns out that the idle system is a kind of separate mini-carburetor that complements the main one. Fuel liquid and air are supplied to it, the necessary fuel assembly is created, which is sucked into the inlet. Thus, in XX mode the device is entirely dependent on the mini-carburetor.

Adjusting screws are mandatory elements of the CXX. They interact with the dispensing needle. For example, using the quality screw you can adjust the gas supply, and using the speed screw you can adjust the number of shaft rotations per minute.

Among the other important parts of the SHS, we can also highlight the bypass channel. Without it, it is extremely difficult to regulate the fuel assembly, since the element is very sensitive and responds to any error in the location of the needle valve.

Features of servicing DAAZ-21073 devices

Electrical diagram of VAZ 2121 Niva carburetor

All possible disruptions in the operation of the device directly depend on the quality and frequency of service. Despite the design differences between the VAZ DAAZ-21073 and the DAAZ-4178 carburetor on the UAZ, their maintenance is not much different. The technically required work includes:

• external cleaning;
• washing the float chamber strainer;
• cleaning the float chamber;
• cleaning jets;
• adjustment of the float device;
• adjustment of the starting device;
• stabilization of the XX system.

Washing the external and internal parts of the carburetor unit is carried out using kerosene, white spirit or preparations in aerosol cans. The aerosol composition is injected into the chambers and jets while the engine is running. The cleaned apparatus is blown with compressed air.