The most popular carburetor model on VAZ-21083 vehicles is Solex. Most of the machines of the 8th and 9th family were produced with engines having a carburetor injection system. In the early 2000s, injection injection was first introduced. Carburetors of this model are very easy to adjust, there is practically no fine tuning, the design does not include complex components and mechanisms. In the article, we consider all the subtleties that the Solex 21083 carburetor has.
Carburetor design
DAAZ-2108 carburetors began to be used on VAZ cars in the mid-eighties. The very first machine on which they were installed was the VAZ-2108 model. They worked with engines of 1.1 and 1.3 liters. After launching production of cars with 1.5-liter engines, Solex 21083 carburetors appeared. The digital designation indicates that the device is mounted on VAZ-21083 engines, the volume of which is one and a half liters.
The main purpose of the carburetor is to prepare a combustible mixture of gasoline and air, which ensures the normal operation of the engine, regardless of the loads and speed.
Structurally, the carburetor is made of several elements:
- The main body, in which the economizer, the XX system, the main dispenser, various diffusers, and accelerator pump are located.
- A cover in which there are floats, an idling valve, a starting device, an air damper.
A carburetor is a two-chamber type device; nozzles are located in the main dosing system. They are installed in the chambers in the middle, inside the case. In the upper part, air nozzles of the dosing system were installed. The design provides for a small block that heats the fuel mixture. Hoses connected to the pipes of the cooling system are connected to it . At the bottom of the body are two throttle valves that open alternately. The opening of the dampers takes place successively, using levers. On the lid there are two nozzles that are designed to supply gas and drain excess back into the tank.
Selection of nozzles for the Solex carburetor
There are repair kits on sale. They consist of air and fuel jets of the secondary and primary chambers. There are several types of repair kits that can work with various engines. It all depends on what section the diffusers have. In some cases, it will be much better to buy a VAZ carburetor. The price of a new one is about 4000 rubles.
Since this type of carburetor can be installed on the engines of other cars, when using standard jets their cross-section is not enough. The engine has one requirement for a fuel-air mixture, and the carburetor makes it with a completely different proportion. To improve acceleration and dynamics, you can install jets with a large cross section.
But at the same time, gas mileage is much higher. You also need to know that installing such jets does not guarantee a one hundred percent positive result. You’ll do the right thing if you don’t experiment, but simply install the kit designed for this engine on the carburetor.
Insufficient engine power: reasons
If the carburetor is mounted on a VAZ-21083 engine, then it is better to use jets designed specifically for it. If even when installing jets with a large diameter, the acceleration of the machine is weak, there may be several reasons:
- Insufficient compression in the engine cylinders.
- The ignition timing is too early or too late.
- Poor spark plugs or their failure.
- Damage to high voltage wires.
- Malfunction of the ignition distributor.
There are many other reasons why the engine does not develop the required power. To identify them, you will need to conduct a thorough inspection of the car and diagnostics of all nodes.
Is it possible to install the Solex carburetor on other engines?
The advisability of installing the Solex 21083 carburetor on other car models is very doubtful, since the savings are small. And then only in the case when the driver drives carefully and does not accelerate sharply. For this reason, it is best to install a carburetor on the engine with which it will work as perfectly as possible. Jets should also be selected from those proposed by the manufacturer. It is not difficult to adjust the Solex 21083 carburetor , but to achieve ideal operation on engines with a large volume is problematic.
Before buying, pay attention to the manufacturer of the repair kit. Very often come across Chinese cheap products that do not differ in quality. The diameter of the cross section of the nozzles may differ from the declared value, so the operation of the carburetor will be incorrect. Buy the Solex 21083 carburetor for the jets included in the repair kits only from a trusted manufacturer who has proven himself on the good side.
How to adjust
Only three adjustments can be made on Solex 21083 carburetors:
- Set the fuel level in the float chamber to the required value.
- Set the idle speed of the crankshaft.
- Change the composition of the air-fuel mixture with a quality screw.
The last adjustment is quite simple, anyone can do it yourself. To do this, the engine warms up to operating temperature, and using the screw of the mixture quantity, the crankshaft speed is set to 800 rpm. Further actions are as follows:
- The quality screw is screwed in until the speed of the crankshaft decreases significantly. Engine operation will be intermittent.
- Then the screw is turned off one turn so that the engine starts to work in normal mode. If you unscrew this screw strongly, then gasoline consumption will increase sharply.
Otherwise, it is necessary to stabilize the motor with a quantity screw.
Idle System Faults
The Solex 21083 carburetor, the adjustment of which is discussed in the article, sometimes has one problem. This is the inability to adjust the idle speed using a mixture quality screw. The reasons for this behavior are:
- The nozzle is clogged in the electrovalve.
- No gas flows through the idle channels.
- There is a malfunction in the solenoid valve.
To verify the operability of the electric valve, you must perform a series of actions:
- Stop engine and remove wire from contact on valve.
- Unscrew electrical valve.
- Remove the nozzle, if necessary, use pliers.
- Turn on the ignition.
- Connect the wire to the contact on the valve, put its body to the ground.
If there is a click, and the valve stem drowned, freeing holes in the nozzle, then there are no problems with the device. Otherwise, install a new solenoid valve. Very often small specks fall, so it is necessary to blow out the nozzle. The operation of the idle solenoid valve can be checked by removing the wire from the ferrule while the engine is running. The engine should stall almost instantly, this indicates that the mechanism is working.
Setting the gas level in the float chamber
In order for the supply and consumption of gasoline by the fuel system to be balanced, it is required to set the level of the float. For this:
- Disassemble the upper part of the carburetor, remove the filter housing, disconnect the cables.
- Remove the fuel system hoses.
- Use a Phillips screwdriver to remove the screws that secure the cover to the main body.
- Between the float and the horizontal of the cover there should be a gap of not more than 1-1.5 mm. Otherwise, you need to make an adjustment by bending the plates.
When setting up, keep in mind that the floats must be at the same level. All work is done relatively simply, change the nozzles to "Solex 21083" and adjust - this is the maintenance of the injection system.