This article will talk about the VAZ-2101 carburetor. This is the main element of the fuel injection system. And there are quite a few problems with the carburetor. And not everyone knows how to properly repair and adjust it. Good masters sometimes in the afternoon with fire can not be found. Of course, before you sin on the injection system, you need to make sure that it is it that failed. Because failures during acceleration, a long start of the engine, its uneven operation can be caused not only by malfunctions in the fuel system, but also in the ignition.
Carburetor "penny"
On VAZ cars of the classic series, in particular on the 2101 model, several types of carburetors are installed. They have certain differences, for example, the size of the nozzles, the presence of a vacuum corrector. If we talk about a penny carburetor, it is suitable for installation only on engines used in this model of car. The reason for this is that the distributor is used without a vacuum corrector. More modern cars are equipped with ignition systems in which the distributor is adjusted by vacuum. And we are talking not only about BSZ, but also about contact (classic) ones. In the conditions of your garage, it’s rather difficult to carry out maintenance and adjustment of the carburetor , since it requires not only a tool, but also knowledge, understanding of the principle of the injection system. But most importantly, you should know how to connect the carburetor to the fuel supply system.
Penny Carb Systems
But you can do it yourself without any problems adjusting the idle speed, clean the jets, visually assess the condition of such an element as an accelerator pump, and in case of breakdown, replace it. You can also change all gaskets, o-rings, clean the fuel channels to bring the injection system to normal. It is worth noting that all adjustments should not happen anyhow, but taking into account the percentage of CO 2 in the exhaust system. It is worth noting that the VAZ-2101 carburetor contains a float system that allows you to maintain the required level of gasoline, as well as adjust it. The accelerator pump, the main dosing system, the econostat, the idle adjustment mechanism - we will talk about each of these systems in more detail.
Petrol level float mechanism
And it’s worth starting with a float design. To maintain a normal level of gasoline, a float mechanism is required, which is installed in the chamber of the same name. If there is a very small or very large level, then the engine will not work properly. Often, such a malfunction occurs when there is a leak in the needle valve. In the event that poor quality gasoline is used, it contains impurities, the VAZ-2101 carburetor will quickly become clogged. Impurities enter the carburetor system and clog holes. Therefore, it is necessary to carefully inspect the entire fuel line, replace the filters, and then clean the valve. If necessary, adjust the level of gasoline in the float chamber.
Trigger system and solenoid valve
Very often, the launch system, as well as the idle speed, breaks down in the “penny” carburetor. If the air damper is not completely closed during the cold start of the engine, it will be very difficult to start it. Of course, some carburetor jet could simply become clogged. In this case, complete cleaning will help. To get rid of all problems, it is necessary to carefully clean the air damper drive. And also, if necessary, adjust this actuator so that the clearance is normal between the carburetor wall and the damper itself. In the event that the engine starts to stall at idle, first of all, it is necessary to diagnose the electric valve. In particular, sometimes the voltage that is supplied from the ignition switch to this mechanism disappears. To check it, just use a piece of wire to connect its central contact with the positive terminal of the battery. If there is no click when connecting the power, this unit has burned out. Therefore, it is necessary to change it. If there is a click, then it is necessary to unscrew the solenoid valve. Then clean its channel, as well as the nozzle.
Idling: setting
The new carburetor is configured similarly. Carefully study how this process occurs. To adjust the idle speed, you need to know how many revolutions the engine must develop in this mode. You need to achieve an average frequency of 850 rpm. For adjustment, a screw is provided for the quantity and quality of the mixture. First you need to rotate the number screw to achieve the nominal speed. Then, turning the quality screw, you achieve the maximum speed. After that, turn the number screw and reduce the speed to the original 850 revolutions. Then again we begin to “play” with a quality screw. It is necessary to bring the engine to a state where it starts to shake. Make the final adjustment by rotating the quality screw a few turns counterclockwise so that the engine runs as stably as possible.
Throttle valves
Please note that you must use the most pure gasoline possible. The carburetor will quickly become worthless if there are impurities in the fuel. The first step is to adjust the position of the throttle valves in the carburetor. To make the adjustment, it is necessary that they fully open. Check their position by turning the drive lever all the way. In the primary chamber, it is necessary that the shutter opens by about 13 millimeters. The error in this case is not more than 0.5 mm. This parameter can be changed if the lower antennae is bent in the necessary direction. The secondary camera should open a maximum of 15 millimeters. The error is the same as for the primary camera. The opening value can only be adjusted by unscrewing the stem, which is located on the pneumatic actuator. The damper in the primary chamber is not fully open, the antennae on the levers should begin to touch.
Needle valve
When the lever is rotated all the way, the carburetor flap must be closed, by which the amount of air is regulated. Please note that during adjustment it is necessary that with the air damper closed, the primary chamber should be ajar no more than 0.8 millimeters. To adjust the accelerator pump, you need to turn the lever ten times that controls the throttle valves. At the same time, gasoline that leaves the sprayer must be collected in a beaker, with the help of which the volume is then measured. The maximum value should be 8.75 cubic centimeters. Please note that before starting the test, you need to pump the pump with the lever so that all the channels are filled to the maximum. Be sure to check how tight the carburetor needle valve is during all repairs. It is advisable to carry out this work on a special stand. With it, you can feed gas into the carburetor under a certain pressure. And control whether the needle valve can withstand the load.
Carburetor repair kit
Please note that with the apparent uniformity of all carburetors, the repair kit can be very different. When heading to the store to purchase a repair kit, you need to pay attention not only to the car model, but also to the type of carburetor itself. In other words, if you have Solex installed, the Ozone carburetor repair kit is simply not suitable for you. Usually in a repair kit there are two gaskets that are between the parts of the carburetor. It also includes fuel and air jets, accelerator pump sprays, a needle valve, a thimble-like fuel filter, and a spring. You can adjust the VAZ-2101 carburetor only if all its elements are suitable for use. In addition, the repair kit should have several rubber rings. Please note that you must buy original kits that are manufactured in our country, and not in China. Unfortunately, the latter may not contain some elements that must be changed during the repair of the carburetor. Sometimes even they have very poor quality, and there are also differences in size. Therefore, they simply cannot be installed.
Conclusion
Now you know the basic information about the design and tuning of the VAZ-2101 carburetor . Despite the relative complexity of the system, adjustments can be made without much labor on their own. Of course, during the work you will need a carburetor repair kit, which can be purchased at any auto parts store. Carefully look at the carburetor of which manufacturer is installed on your car. After all, the repair kit from Ozone to Weber or Solex cannot be installed, they have completely different designs.