Carburetor VAZ 2109 Solex High Fuel Consumption • Ignition fault

Quick repair and precise adjustment of VAZ 2108/2109 carburetors: instructions and tips

One of the most common models in the country produced by AvtoVAZ can be considered the “eight” or its modification, the “nine”. Owners of VAZ 2108/2109 cars have been convinced in practice of the performance of their vehicles and their ease of maintenance. In order to prevent any malfunctions in the operation of the machine in a timely manner, you need to carefully monitor its technical condition. One of the main tasks of the driver is to control the operation of the carburetor device on the VAZ. The car owner can perform almost all types of repairs and adjustments with his own hands, since the carburetor design has a simple structure.

Carburetor mechanisms of the Solex series are produced at the Dimitrovgrad Automotive Accessory Plant. The designs are intended for use with front-wheel drive VAZ vehicles, in which the engine unit is located transverse to the body.

The standard model for equipping the VAZ 2108/2109 is the DAAZ 2108–1107–10 carburetor. It is paired with a 1.3-liter engine. Carburetors 21083–1107010 are installed on 1.5 liter engines.

The DAAZ carburetor is used to equip all cars of the eighth and ninth models

Modern equipment of the VAZ 2108/2109 is provided by carburetors of more advanced models, since they are equipped with a starting device in automatic mode:

modification 21083–1107010–31 has one stage of automatic control and start in a given mode;

modification 21083–1107010–35 is equipped with two stages of air damper control, which ensures more stable operation of the power unit;

modification 21083–1107010–62 is similar to the previous version of the carburetor mechanism, but has the addition of an electrical air-fuel mixture mixing system.

— The EPHH system is faulty: Exhaust system

Increased fuel consumption due to a damaged air conditioning system Although the compressor is driven by a serpentine belt, the air conditioning system has very low efficiency and fuel consumption increases significantly. The palm belongs to the anti-advice, which may interest the car owner right now is the use of cheap types of gasoline instead of expensive ones or those recommended by the manufacturer.

Sequencing

If the accelerator pump nozzles are incorrectly adjusted, the nozzles are replaced or adjusted so that the fuel jets are directed exactly into the hole that appears when the throttle valve is opened, without intersecting. For example, in order to achieve more stable operation of the internal combustion engine at idle, it is worth abandoning the EPHH forced idling economizer mechanism and installing a plug instead.

Setting the ignition timing - Ignition fault

1. After this, you will need to disconnect two drives from the carburetor body (one goes to the air damper, the other goes to the throttle). In addition, it is immediately recommended to disconnect the return spring and its retainer from the drive.
2. Next, the wire is disconnected from the forced idle economizer screw.
3. After loosening the clamps, you will need to remove the fuel supply pipe and the hose that works “for return”.
4. The screw securing the heating block is unscrewed and the block is removed.
5. The ventilation hose and vacuum hose are disconnected from the fitting at the top of the carburetor.
6. After disconnecting all lines, it is possible to dismantle the carburetor assembly itself. To do this, you will need to unscrew the four nuts that secure the carburetor with studs to the intake manifold. The device is pulled out along with the gasket.

Ignition malfunction • Both on the VAZ 2107 carburetor and on other cars, high fuel consumption can be caused due to low tire pressure.

Breakdowns that cause increased consumption Pros and cons

Video: setting up the Ozone carburetor • When excess fuel burns, the idle speed returns to normal until the next drop falls.

Setting the fuel level

Adjusting the amount of fuel in the chambers of Solex carburetors is a simple procedure and does not require specialized equipment. Although in the factory this adjustment is performed using a special template, which simplifies and speeds up the work. But at home you can do without this template. To carry out adjustment work yourself you need:

• screwdrivers (phillips, flat);
• ruler (preferably a caliper);
• round rod with a diameter of 2 mm (wire or drill will do).

With such equipment you can quickly complete all work.

A brief historical excursion for connoisseurs

The main differences in appearance are as follows: original headlights, additional brake light, new spoiler, etc. As for the “filling”, there have been many more changes:

Considering all of the above, the owners of the VAZ 2114 can only be envied. The ride quality is stable, the control unit is reliable, the steering wheel no longer blocks part of the dashboard and leaves enough space for the driver to sit comfortably. If necessary, you can easily convert your hatchback into a station wagon by simply folding the rear seats. Thus, the car becomes a utility vehicle with a large body capacity. Comfort is also an undoubted advantage due to the same heated seats and thoughtful ventilation. All this sounds great, and it would be so if not for one big drawback - the fuel consumption of the VAZ 2114. The reasons may be different, and they will be discussed further. But the fact remains: sometimes 10 or even 13 liters of gasoline are needed per 100 km, which cannot but upset car owners. Fuel consumption is actually high. Since it is necessary to protect lovers of the domestic automobile industry with all our might, we will try to understand the issue and find a way out.

Car chassis

General diagram of the DAAZ 2108 unit. Diagram of jet placement. Diagram of purging the lid channels. Fuel jets are removed with a wooden stick or toothpick. Replacing the needle valve. This is what the floats installed on the Solex lid look like. These adjustments are carried out when the engine is unstable at idle and when certain symptoms of improper operation of the power system appear.

High fuel consumption VAZ 2109 carburetor causes Carburetor malfunction

To prevent the carburetor from creating problems for you, try to use high-quality fuel, lubricate quality screws, and check the serviceability of the choke cable. In the formula Qн 0.01 x Hsan x S Hw x W 1 0.01 x D, the basic indicator becomes the consumption without load in running order Hsan, which is individual for each truck.

Adjustment sequence - Engine malfunctions

1. Charge the battery;
2. Warm up the engine to operating temperature;
3. Turn on the headlights, audio system and other elements that consume electrical energy;
4. Achieve maximum idle speed;
5. Rotating the quality screw, reduce the speed by 50-150.

Preparatory work • Remove the air filter housing and remove the choke lever completely.

Cylinder piston and valve group • Pros and cons

• outside the city - 5.2 liters;
• in the city - 8.2 liters;
• in the combined cycle - 6.7 liters.

Malfunction of the vacuum ignition timing regulator

Increased consumption can be caused by carburetor malfunctions such as clogged air jets; malfunction of the EPH system; a loose solenoid valve and, as a result, fuel leakage between the nozzle and the channel walls; economizer malfunction; incomplete opening of the air damper, leading to constant over-enrichment of the mixture. If, under heavy load and sharp acceleration, your fingers begin to noticeably knock and engine detonation appears, you should move the distributor a little to minus, then check the car again while driving.

Owner reviews

“I have the most powerful ninety-nine with a rotary engine. I got it from my father, who bought himself a foreign car, and gave this car to me so that I could gain experience in driving and repairs. What can I say about the car. It looks quite tolerable, and my father took care of the car, so there is not even the slightest damage. The interior is poorly equipped, but all the necessary functions are available, so the ride is quite comfortable. There is a lot of space, enough for the whole family to travel, and even to throw things in. Well, the most important thing is the engine. It pulls very vigorously, and you can even reach decent speeds on the highway. Its only drawback is its high gasoline consumption, which reaches 15 liters in the city, and 8 on the highway,” Evgeniy from St. Petersburg left this review about the car.

Insufficient tire pressure, tire wear Adjust the float

• in traffic 9.1 l;
• on average 7.7 l;
• on the highway 5.5 l.

If you determine a large excess consumption of fuel using instruments, first make sure that the instruments themselves and the fuel level sensor are working properly. If not, replace them.

The volume of the fuel tank installed during production on the VAZ 21099 car is 43 liters. Before taking measurements, make sure that your car has an original gas tank. Otherwise, it is necessary to measure the capacity of the non-original gas storage tank.

To measure fuel consumption on an injection machine, you need to fill the gas tank to the neck and measure the number of kilometers traveled until the engine stalls from lack of fuel. It should be taken into account that the capacity of the fuel system as a whole exceeds the volume of the tank by 1 liter.

If your car has a carburetor, you can take a plastic bottle, fill it with fuel, place it in the engine compartment away from the engine and outlet pipes, and tightly connect this improvised gas tank with a flexible hose to the fuel pump. Next, you need to measure the distance traveled by the car before running out of fuel, and you will get accurate fuel consumption indicators.

In addition, some car owners install mechanical water consumption meters instead of a fuel filter. Cheap and cheerful, but not recommended.

VAZ 21099 1.3 MT 135hp

This is a rather rare version of the compact sedan. The main purpose of creating this modification is import. It was precisely this “charged” engine, as conceived by the designers, that should have appealed to the foreign public. The release of the 135-horsepower engine took place in the same year, 1990, as the debut of the car itself. With such a modest engine size and a non-standard amount of horsepower for Russia of that era, consumption was quite moderate: city - 12.5 liters, highway - 7 liters. Maximum speed is up to 190 km per hour. It is recommended to use AI95 for this installation.

Real gas consumption

Setting up the float chamber. Float adjustment

Again, the fuel mixture becomes very rich in fuel, since air enters it with difficulty through a heavily clogged air filter element. From this small guide, you were able to learn how to clean the carburetor and now you can proceed directly to performing adjustment procedures.

Tips for setting up, adjusting and troubleshooting Carburetor malfunction

• Incorrect cylinder pressure. On the “Nine” it should be 9.9 kg/cm2.
• Problems in the engine cooling system. This can also lead to increased friction, which, in turn, leads to excessive fuel consumption of up to 30%.
• The ignition timing was set incorrectly.
• There is a leak in one of the fuel system elements. This can also lead to overflow in the carburetor.
• Then there are problems with the chassis system. These are not completely disengaged wheels, overtightened wheel bearings, or lack of tire pressure.
• Incorrectly selected spark plugs and gaps between them.
• Malfunctions in the operation of the vacuum advance regulator.

Calibration data for the ratio of large diffusers and jets (manufacturer's plant)

To this day, they remain the most preferred, since their design is simple, while they provide excellent dynamics for the car, but their fuel consumption varies from 10 to 13, 14 liters, which repels potential buyers. To shut off the supply of gasoline to the first chamber, more precisely, to its transition device and to the XX device, a valve is used, which is called an electromagnetic valve.