Adjusting the VAZ 2107 carburetor, as well as all other similar models, is one of the relevant topics, not only on the Internet, but also in ordinary life.
A lot of cars of this brand were produced at one time, and it was not for nothing that they were popularly called the "Soviet Mercedes" for their reliability and design. Due to their such an impressive amount, cars with fuel injection systems still cannot drive them out of our way. That's why adjusting the VAZ 2107, 21099 carburetor and other modifications for a long time will be an urgent problem for some drivers.
General rules
Adjusting the VAZ carburetor greatly affects fuel consumption, as well as uniformity during engine operation, its throttle response. The premature wear of certain parts directly depends on it. It checks and, if necessary, adjusts the idle speed of the VAZ carburetor, the fuel level in the float chamber, the calibration of the nozzles or their throughput, as well as the condition and operation of some basic mechanisms. In addition, in some cases, an additional position is set in the carburetors for the adjusting needle in the main jet. Adjustment of the VAZ 2107 carburetor should be carried out at least once a year. It is desirable that this work is done by a specialist in the workshop. This is because the adjustment of the VAZ 2107 carburetor or other models of this automaker is similar to setting the piano for good sound. At the same time, if this musical "gentle" instrument will play poorly, then nothing terrible will happen.
But if the car’s carburetor does not work well, this will lead to
high fuel consumption, which means extra costs. This element in the power supply system of an automobile engine, inside of which a mixture is formed due to the mixing of fuel and air, starts to function poorly as a result of clogging of its calibrated holes and other components. That is why continuous carburetor maintenance and adjustment is required. VAZ 2101 from the moment of its release from the conveyor has been equipped with this exact and complex instrument of the Weber brand, manufactured at the Dimitrovgrad auto-aggregate plant.
What is a carburetor, and why is it needed
These components of a car with an injection system are designed to mix air with automobile fuel. The result is a fuel-air mixture in certain proportions. As a rule, if the carburetor adjustment is VAZ 2107, 2108, etc. carried out correctly, then for every gram of gasoline there should be about fifteen grams of air. Specialists call such a composition stoichiometric. In our country, the most popular are carburetors of the Ozone, Solex or DAAZ series. They are used on domestic "sevens" and "eights". Due to such a widespread use of VAZ 2108 and VAZ 2107 carburetors, they can be repaired even in the garage, without resorting to branded services for help. Some motorists independently carry out not only the adjustment of the VAZ 21083 carburetor, but also its repair. This was made possible thanks to the large amount of necessary information on the Internet, in books and automobile magazines, as well as due to the rather simple design of the device.
Carburetor operation
It involves precise dosing of fuel and air. And this means that you need to adjust the carburetor. VAZ 2105 and later models control this process with special plugs - “jets”. Their "performance", as you know, is determined by both the length and the diameter at the passage opening, as well as the difference between the inlet and outlet pressures. There is a nonlinear relationship between the cross-sectional area and the throughput of the nozzles. It is she who is the basis when adjusting the VAZ 2110 carburetor and earlier models. This means that by increasing the cross section by, say, ten percent, you can get increased throughput by twenty-five percent. Knowing this little trick, many motorists are trying to increase power, and at the same time to reduce fuel consumption in the car.
Where to begin
Adjustment of the carburetor VAZ 2103 and later makes begins with the procedures included in the list of its maintenance. Firstly, it is a wash or cleaning, which is a prerequisite for the simple reason that it is much more pleasant to work with a clean device. In addition, cleaning carburetor elements has a very positive effect on its performance. At the same time, a mesh filter with a float chamber and nozzles, both air and fuel, are washed.
Float chamber and fuel level in it
Adjusting the float mechanism is not very difficult, but rather a crucial stage. It is divided into three stages. The correct adjustment of the VAZ 21099 carburetor and other models is the adjustment of the amount of fuel in its float chamber. For this, a special cardboard template is prepared in size six and a half by fourteen millimeters.
Then, by unscrewing the carburetor cover, the highest level is determined by slowly closing the fuel supply hole with a needle valve. Then the removed cap is placed vertically, so that the float holder has the ability to touch the ball from the spring-loaded valve, and only came closer and in no case pressed. Then it is retracted in the opposite direction and the template is substituted. At the same time, the distance corresponding to the normative should be exactly equal to fourteen millimeters with a very slight error. Otherwise, by bending the special stop located on the float bracket, the required distance is established.
Testing the starting device
The adjustment of the VAZ 21099 carburetor at this stage consists in a quick and qualitative adjustment of the function of the mechanism of the starting assembly. To begin with, experienced motorists prepare a short piece of wire with a diameter of 0.7 or 0.8 millimeters, as well as a template made of sufficiently dense material, with a width of up to five and a half millimeters. Then the air filter of this car is removed, and then the carburetor is completely cleaned, for which its damper is completely blocked. In this case, the tail of the rod connecting the rod on the starter with the lever on the air damper must be in such a position that, without moving anything, you can take a position at the very end of the groove. Adjustment of the VAZ 2105 carburetor requires a mandatory check of the throttle openness. To do this, the device is removed from the machine. Then, on a carburetor already located outside the car, the three-arm lever is turned fully counterclockwise. Then, using a pre-prepared wire, the gap is checked, which in normal condition should correspond to a maximum of 0.8 millimeters. Otherwise, you need to bend the rod or rearrange its tip in another hole.
Idle adjustment
It is more correct to entrust this procedure to a specialist. But if the car owner is confident in his capabilities and wants to do it on his own, then he will definitely need a gas analyzer with a multimeter. The
idle adjustment of the VAZ carburetor of any model is carried out in the engine in a heated state. In this mode, the motor should be in the range from eight hundred twenty to nine hundred revolutions per minute. At the same time, it is imperative that you first adjust the ignition timing. First, the devices are connected. In this case, the multimeter is connected to the frequency demonstration mode when the engine is running. With one probe, it connects to the mass, and the other to the primary winding on the ignition coil. Then the gas analyzer is turned on, its sensor is previously inserted into the exhaust pipe of the car. Then the engine starts, as a result of rotation of the screw for the quantity of the mixture the desired speed is achieved: the set limits are from eight hundred twenty to nine hundred revolutions per minute. And when the screw of the mixture formation quality is rotated, the
VAZ 2106 carburetor is adjusted
, more precisely, the amount of CO in the exhaust gas is adjusted, during which the engine speed also changes. The operation is repeated until regulatory parameters are set. Sometimes, when adjusting the Ozone carburetor, the VAZ 2107, for example, creates a situation where, even after several visits, the result still does not match the desired one. In this case, it is necessary to pay attention to the plastic special bushings pressed on the adjusting screws. This applies only to new carburetors. For example, the screw for adjusting the quality of the fuel mixture by the manufacturer is limited for rotation to a maximum of fifty degrees, and the number to ninety. Such parameters are provided so that during the entire warranty period of the car factory adjustments are not accidentally lost. You need to remove these two bushings and start the adjustment again. And if everything is done correctly, then after abruptly depressing the gas pedal and then abruptly releasing it, the engine starts to gain momentum very clearly. And after their reduction, it will not stall.
Jet calibration
The throughput of these parts of the chassis of the car directly affects the composition of combustible mixtures. In this case, a deviation from the value or parameters established by the manufacturer, calibers, diameters for the jets to the larger or smaller side not only makes the functioning of the car engine less qualitative, but also leads to an increase in fuel consumption. With a decrease in the orifice of the nozzle or depletion of the mixture, this can be fraught with a sharp deterioration in driving performance and acceleration of the car. The throughput of these parts is measured by the volume of water flowing through them for one minute through them at a temperature of twenty degrees and under a meter head of a water column. It changes over time. The nozzle's cross-section is slightly increased, especially with frequent use of low-quality gasoline. In addition, during engine operation with a large pass of gases through the piston rings, this parameter somewhat decreases due to the formation of tar coating in the calibrated holes.
Choke actuator
Carburettor adjustment involves several adjustments. In particular, this also applies to the operation of the air damper actuator. The order of the work is as follows: first you need to remove the car air filter. Then, holding the handle of the same shutter, begin to carefully move it in the opposite direction from you. This should be done until it takes upright position. The air damper itself must also be in the same position. If this fails, then you need to make an adjustment.
Holding the sleeve from turning, and for this you need to have a seven-millimeter key on hand, the screw by means of which the thrust at the air damper was fixed is loosened. After the unscrewed part must be tightened in the opposite direction. In the fully retracted position of the handle, the inlet on the neck must be closed by an air damper. That's all. And then, in the reverse order, the removed air filter is also replaced.
Types of carburetors
Experienced motorists who have been driving the Lada for years, know that the VAZ 21213 carburetor, the adjustment of which does not cause difficulties, is better to buy from the manufacturer DAAZ. Best of all for VAZs of this model are devices from the Solex series. Their feature is that the design of these carburetors is suitable not only for front-wheel drive cars, but also for almost all brands. In addition, their necessary parameters for the preparation of the fuel-air mixture are achieved by using special sets of nozzles and diffusers of certain sizes, selected depending on the volume of gasoline engines of the car. Unlike the Ozone carburetors in Solex, the connection between the throttle valves in its first two chambers is mechanical, not gas-dynamic. Another feature of the latter is that they have a normal system at idle. Therefore, when adjusting the carburetor of this brand, the screw for the amount of mixture actually opens the throttle in the first chamber.
In conclusion
During operation, the carburetor does not need regular external rinsing. Such a need arises only with severe pollution of moving mechanisms, as a result of which the mobility of parts is impaired. In addition, "bathing" is necessary before adjusting. Of course, there is a frequency for the implementation of preventive car interventions. And if, for example, on the “Lada” of the seventh model, the carburetor can be repaired only when the old unit fails, then, without waiting for a serious breakdown, the valves must be adjusted. VAZ 2107, the carburetor of which must be checked for gaps every maximum fifteen thousand kilometers, otherwise it can get in the middle of the road, and then even without the help of an "iron horse" tow truck, it can’t be driven home. That is why it will be much easier to spend several hours to independently check it or take the car to a service point.
Nuances
For internal cleaning of the carburetor when adjusting it, the use of brushes and rags is not recommended, since fibers or bristles can accidentally get into the jets. To care for this component of the chassis of the car, manufacturers produce special preparations. Some experienced drivers for this purpose use gasoline or kerosene, as well as a solvent, sometimes compressed air. Only after cleaning the carburetor, you can begin to adjust it. Before undertaking such a serious intervention in the course of its operation, it is necessary to first make sure that all malfunctions are associated with this particular unit, and not, for example, with the ignition or fuel supply system, in which the fine filter of the pump may become clogged etc. And most importantly: despite the expansive-assertive seizure of the automobile market by injection engines, knowledgeable in cars and long experience, drivers still prefer to have a carburetor on board their "iron" friend. After all, he is the guarantee that the car will start even in severe frost. And in order for such a necessary device to work properly, you need to regularly monitor its condition: clean and adjust as necessary.