Fuel consumption for VAZ 21099 carburetor

In 1990, the production of the well-known “99” – VAZ 21099 – started. Now, it does not lose its popularity among buyers. The fuel consumption of the VAZ 21099 per 100 km is of interest to almost every future owner - it is about 11 liters
. Driving a car, engine type, and road surface directly affect fuel consumption. In addition, there is a strong dependence on the year of manufacture; the newer the car, the more economical it is and uses less fuel. Next, we’ll talk more precisely about how to reduce the gasoline consumption of a VAZ 21099 and what can be modified for the desired savings.

What determines the cost of a VAZ?

A front-wheel drive sedan is considered a Russian car, which is intended for traveling on Russian highways. Lada models from 2000 to 2007 have an engine capacity of 1.5 liters. Based on driver reviews, we can conclude that the car feels better in the city than off-road.

Fuel consumption for the VAZ 21099 (carburetor) depends on:

• year of manufacture of the car;
• on the cleanliness of the filters;
• filled with good quality oil;
• on engine volume;
• on the condition of the injectors;
• depending on the type of ride;
• maneuverability;
• from technical characteristics.

Every experienced driver knows that the filter must be changed frequently to function properly.

Getting around the city

The type of driving and all maneuvers around the city result in high fuel consumption. After all, the engine does not work smoothly, often changes speeds, switches, and because of this, LADA gasoline consumption per 100 km exceeds 12 liters.

It is worth noting that if you live in a big city, where you have to stand in traffic jams for a long time in the morning and evening every day, then it is better to turn off the car so that there is no overheating and excessive consumption of gasoline

The fuel consumption of the Lada 21099 on the highway at average air temperature is about 7 liters, this is an economically advantageous fuel consumption. VAZ is a financially convenient car if you monitor its technical condition.

Official data (l/100 km)

One of three gasoline engines could be installed on the car. The smallest - 1.1 liters, had a power of 54 horsepower. The fuel supply here was carried out by a carburetor. Fuel consumption per 100 km was 8 liters in the city and 5.3 liters on the highway. A slightly larger 1.3 liter engine. It is already capable of developing 64 horsepower.

Fuel is also supplied via a carburetor. There is also a 1.5 liter engine, which, depending on the fuel supply system, develops different power. If a carburetor is installed, the engine can produce a maximum of 72 horsepower. If the injector is 78 hp. But then the consumption has increased - it is 9 and 7.5 liters, respectively.

What reasons influence high fuel consumption?

Already experienced drivers can tell exactly why their car, for one reason or another, has high gas mileage. We would like to give you an example of several problems that the owner of a VAZ 21099 car may encounter:

• poor or incomplete opening of the carburetor damper;
• lack of oil in the gearbox - leads to a reduction in transmission;
• the ignition timing is poorly set - early or late ignition reduces power;
• the vacuum accumulator sensor is faulty;
• when a large amount of fuel enters the carburetor.

Such nuances should be taken into account if you decide to find the problem of high fuel use.

How to reduce gasoline consumption in a VAZ

VAZ 21099 is a rather rare modification of this car brand, created for import to other countries. All its embedded data indicates average fuel consumption, power, speed, convenience and practicality. In terms of fuel consumption VAZ 21099, the injector also has advantages over its predecessors. To reduce fuel consumption on a VAZ, you need to do the following:

• clean the fuel filter;
• check for fuel leaks;
• adjust the carburetor;
• configure lambda umbrella;
• warm up the engine to operating temperature so that the fuel does not just flow out, but warms up and is consumed.

The owner of a VAZ 21099 already knows in practice what still needs to be done to reduce gasoline consumption.

Fuel consumption outside the city

VAZ 21099 with a 1.5 liter engine and 135 horsepower is quite practical for driving outside the city, through fields. But do not neglect its practicality and go on dirt roads in the rain and slush. On such a road, a VAZ may require about 10 liters per 100 km.

Therefore, after filling the tank, you need to calculate the distance, as well as the necessary additional consumption. When off-road, try to drive at one speed, do not switch from one to the next, and then back - this will lead to an increase in the amount of gasoline used.

Fuel consumption Lada 2109 1987, hatchback 5 doors, 1st generation

Consumption of VAZ 21099 with carburetor

Initially, the car was equipped with several modifications of gasoline engines of various designs and volumes. The most affordable was the 1.3 engine with 64 horsepower. It, like other versions of the car, was equipped with a five-speed manual transmission with front-wheel drive. The car accelerated to hundreds in 14.5 seconds with a top speed of 140 km/h. With a carburetor fuel supply system, the fuel consumption of this engine was:

• city ​​9.1 l;
• average 7.7 l;
• on the highway 5.7 liters.

A rotary version of the engine of the same volume with 135 horsepower was offered, but it was supplied to special services and for export. The installation of this power unit improved the dynamics, but at the same time fuel consumption increased:

• in city mode 12.5 l:
• in a mixed cycle 10 l;
• on a free road 7 l.

The most popular was the 1.5 engine with 70 horsepower; it was distinguished by its reliability, accelerating the car to 150 km/h, and to the first hundred in 14 seconds. It is fueled with AI 92 or AI 95 with fuel consumption similar to the less powerful version:

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

Owner reviews

• Vladimir, Petrozavodsk. On occasion, I purchased a VAZ 21099 car with a 1.3 rotary engine with 135 horsepower. The power is felt, the car starts briskly at traffic lights, and feels good on the highway when overtaking. But the motor is capricious; you often have to adjust the carburetor. Consumption data in the city is 13 liters per hundred square meters, on the highway it turns out to be about 8 liters.
• Sergey, Kharkov. I have a Lada 21099 with a 1.3 engine with 64 horsepower. A very reliable car, passable, suitable for our rough roads. The power is not enough, but I don’t race, and that’s enough for me. But you can drive around the city or to the country without any problems. Average consumption is 7-9 liters, depending on the time of year and the quality of the road.
• Alexey, Krasnodar. Since 2004, there has been a carburetor VAZ 21099 with a 1.5 engine of 70 horsepower. I consider it the best option for our realities. Repairs cost pennies, the chassis copes well with the loads, I made an overhaul in 2014, and since then I have only changed the oil and filter. Consumption from 6 liters on the highway to 10 in city mode.

VAZ-2109 1.1 carburetor

The VAZ-21091 model was equipped with a derated carburetor four-cylinder VAZ-21081 engine with a volume of 1.1 liters. It developed a power of 54 hp. and a torque of 79 Nm at 3600 rpm. The engine was paired with a 4-speed manual transmission, but production of this model did not last long - until 1991, since the engine power was clearly not enough.

Gasoline consumption VAZ-2109 1.1 carburetor per 100 km. Reviews

• Yana, Odessa. My husband and I bought a VAZ-2109 with a 1.1 liter engine in 2013. At first we were surprised, we didn’t think there was such an engine, but it turned out that it was the original engine. The car was produced in 1990, but is in good condition and the engine is actually not as weak as it seems - there are four of us in the family plus a trailer - it drives fine. Consumption on the highway is about 5.5 liters, in the city – about 8.5 liters.
• Vladimir, Kozlovsk. The engine is not original - after mine burned out, I had to replace the engine. I couldn’t find a 1.5 liter one from my family, but through friends I managed to get a 1100 cm3 engine. What can I say about the dynamics - there is none at all, acceleration is generally slow, it does not accelerate more than 100 km/h at all. But in operation it is quiet and economical - 8 liters in the city, 5.5-6.0 liters on the highway.

Consumption of VAZ 21099 with an injector

Injectors began to be installed on the VAZ 21099 in 2000. Direct fuel injection made it possible to increase the power of power units, while reducing their fuel consumption. The most popular injection modification of the car comes with a 1.5 engine. The designers increased the power to 78 hp, acceleration to hundreds is 13.5 seconds with a maximum speed of 155 kilometers per hour with fuel consumption:

• in traffic 8.8 l;
• on average 7.4 l;
• on a country road 5.4 liters.

The most powerful version with a volume of 1.6 produces 81 hp, reaches a speed of 165 km/h, and the first hundred in 13 seconds. At the same time, the car’s appetite remains quite modest:

• on busy streets 9.1 l;
• mixed mode 7.7 l;
• track 5.7 l.

Real consumption according to reviews

• Svyatoslav, Chelyabinsk. I took the “99” model in 2012 as a workhorse. I chose the option with the 1.5 engine. A very reliable option with an injector, I’m very happy with the car, I go both for work and for fishing, the ground clearance allows me to go outdoors without problems. The consumption of AI 95 in a circle is about 8 liters.
• Sergey, Barnaul. VAZ 21099 2003 with an injector. The car was in excellent condition, nothing had to be done. Over time, I treated the body and repaired the chassis several times - but this is a necessary evil on our roads. The 1.5 engine is very good - it pulls consistently, I only change consumables, I didn’t have to clean the injector. Consumption in the city is no more than 9 liters, and on the highway the car takes 6-7 liters.
• Dmitry, Ulyanovsk. In 2004, I took the most sophisticated version of the VAZ 21099 Lux with a 1.6 engine. The car is powerful, reliable, roomy, and passable. Repairs cost pennies, and they have to be done infrequently; I didn’t do anything to the engine, gearbox, or injector. The average consumption is 7-9 liters, which corresponds to the passport data.

VAZ 2109 1.1 53 hp

Fuel consumption rate per 100 km

This is the weakest version in the entire line of engines. The start of sales of this modification (VAZ 21091) took place in 1987. But this particular installation was not widely used and was discontinued in 1997. The hatchback itself has front-wheel drive and only a manual transmission. The power supply system is a carburetor. The only plus in this variation is consumption: in the city - 8.2 liters, and on the highway - 5.4 liters. Maximum acceleration is up to 139 km per hour. Acceleration to hundreds is carried out in 17 seconds.

Fuel consumption on Russian roads

• Pavel, Gorodets. It is difficult to measure consumption on a 1991 “nine” with a 1.1 liter engine. Not a hint of the on-board computer. I understand that I came across a real exotic, but for a novice student driver this is the only available option for now. I won’t say that a glass of gasoline is enough for her, but the approximate consumption is within 8-9 liters in the city.
• Sergey, Vyborg. I was able to withstand only one year on the 1.1-liter version of the “nine” produced in 1992. Well, the car doesn’t pull along the highway at all. It feels like it was made for grandfathers who can handle 40 km/h. By the way, the consumption of the VAZ 21091 is no less than that of the same model with a one and a half liter engine. On average 9 liters per 100 km in the combined cycle.
• Artem, Elista. For a summer resident, like I am, the main thing is to deliver garden tools and all rubbish safe and sound. So my nine is 1.1 liter. I don't regret 1989. It can withstand speeds of 100 km/h. Moreover, 20 liters is enough for two full trips (a total of 370 km).
• Alexander, St. Petersburg. My VAZ 21091 1.1l. 1992 - the car is clearly not for the track and long trips. The engine strains a lot when you try to reach a cruising speed of 120 km/h. In the city, the differences with the 1.5 version are almost imperceptible, both in terms of consumption (8.5-9.0 liters) and dynamics. That is, if you move 60 km/h, then there are no complaints about such a motor.
• Sergey, Ufa. Some kind of defective 1.1 liter version. I got my hands on a 1993 Nine with just such an engine. Neither accelerate normally nor move off. I thought maybe the consumption would be minimal. I was mistaken, it consumes the same engine as a regular model with a basic 1.5-liter engine (city - 8 liters per 100 km, highway - 6 liters).

How to reduce fuel consumption

Despite the efficiency of the VAZ 21099, there are often reviews of increased gasoline consumption. The most popular reason is the subjective factor. Driving too dynamically increases consumption by up to 50%. It is recommended to move off smoothly, change gears in time in the range of 2-3 thousand revolutions, and move on the highway at a speed of 90-100 mph. There are other problems that, by eliminating them, can reduce fuel consumption on the VAZ 21099:

1. Engine wear. If the compression in the cylinders drops below 8.5 atmospheres, a major overhaul is necessary; after running in, the engine's appetite will decrease.
2. Pressure in the slopes. The manufacturer recommends 2 atmospheres. A decrease in pressure is especially harmful; the car begins to “float” on the road, and consumption increases.
3. Open windows at high speeds increase consumption by 1.5 liters, the turned on air conditioner takes 1 liter per hundred, so it is better to use it on long trips.
4. There is no need to overload the car with tools and other items.
5. Periodically adjust the carburetor and clean the injector; they become clogged, the quality of the mixture is impaired, which leads to overspending. If you don't pay attention to this, the car will simply break down.

Fuel consumption Lada 2109 restyling 1991, hatchback 5 doors, 1st generation

How to reduce fuel consumption on a VAZ 2109 carburetor

If you have high fuel (gasoline) consumption and you don’t know what the reason is, then for a VAZ 2109 car with a new carburetor or an old one

, this article may be useful, it is also relevant for other cars with similar characteristics.

It should be noted that the main reason for the increase in fuel consumption is a violation of the standard regulation of the power system. For this reason, many vehicle owners are interested in how to reduce fuel consumption on a VAZ 2109 carburetor that is configured incorrectly.

In order to find the cause of the malfunction, first of all, it is recommended to look under the air filter cover.

Common reasons for increased fuel consumption:

• Even a slight opening of the throttle can cause an increase in fuel consumption. A similar defect is quite common on Solex carburetors. • For Ozone carburetors, a common malfunction is poor operation of the shut-off valve in the float chamber. Thus, an engine idling will experience wet diffusers due to fuel leakage. It is also recommended to pay attention to filters. A dirty filter can cause the mixture to become too rich. • Another reason for high fuel consumption is a loose solenoid valve on DAAZ carburetors. Such a problem can lead to wear of the conical part of the jet, as well as the seat directly in the carburetor body. • Incorrectly set ignition timing. • Oxidation of the socket in the distributor cover and oxidation of the contacts of high-voltage wires. • Spark plugs working intermittently or not working at all. • Even poorly adjusted toe-in, defects in the brake system (seized pads) and insufficiently inflated tires can lead to increased fuel consumption.

The first way to reduce fuel consumption:

• A working engine should be warmed up to 80 degrees Celsius. • Looking at the position of the tachometer needle, set the speed approximately 15% higher than recommended in the car instructions. Adjustment is carried out using a quality screw. • Next, also use the quality screw, increase the speed even higher. At the same time, use the screw to reduce the speed to the starting position. • The adjustment procedure should be carried out until turning the screws (quality, quantity) does not produce an increase in speed. • Now, the quality screw should be tightened until the speed drops to the level specified in the instructions.

As a result, a level is reached at which the mixture will not become excessively lean, and the CO indicator will correspond to the norm. Next, you should check the operation of the engine. The mixture is too lean if the engine starts to stall when closing the throttle quickly or braking hard. In this situation, you need to slightly unscrew the quality screw.

The second way to reduce fuel consumption:

• For a serviceable engine, warm up the engine to 80 degrees Celsius. • Unscrew the quantity screw and set the crankshaft rotation speed to a level that should theoretically correspond to the parameters specified in the instructions supplied with the vehicle. • Next, also turn on the quality screw and increase the rotation speed a little more. • Slowly tighten the quality screw until the engine begins to “shake”, so to speak. In some cases, at the same time the speed screw should be added, especially if there is a strong drop in speed. • Then, unscrew the quality screw by approximately one-third of a turn so that the motor begins to operate stably. • Change the crankshaft rotation speed with the screw to the level specified in the instructions. At this stage, the adjustment can be considered complete.

What causes high fuel consumption on the VAZ-2109

The reasons are mainly as follows:

1. The carburetor air damper is not open enough. When the motor is running, this mechanism is carefully closed and in a vertical position. In this case, the “choke” handle should be pulled out towards you. If the damper is slightly open, it causes a malfunction. In this case, gasoline is consumed in large quantities, and the volume of air that enters the fuel mixture decreases. To solve this problem, some owners close the carburetor air damper, thereby enriching the fuel mixture. However, this threatens to increase fuel consumption several times. It is better to adjust the air damper drive, and then the problem will be partially solved.
2. The fuel nozzle holder is not installed tightly enough. With this problem, the fuel mixture enters the cold running system, bypassing the fuel nozzle. This leads to fuel entering the cylinders not only at idle, but also in any mode. To fix this problem, you need to check the tightness of the holder. Over-tightening is not allowed because this can lead to deformation. You need to tighten it carefully, but at the same time so that the holder can twist itself out from vibration. On a carburetor with a solenoid valve, you need to check how well it functions. On the motor you need to remove the plug and put on the wire. If the valve is working properly, then shut off the fuel supply by turning the housing clockwise.
3. Lack of tightness of the needle valve of the float chamber. With this problem, excess gasoline enters the float chamber and then into the engine cylinders. This often occurs if the needle valve is faulty. In this case, you need to check the tightness of the device. This procedure is described in any instructions or manual for using the car, so it will not be difficult to perform. It is advisable to replace the needle valve if this problem occurs. There is no point in repairing, since you will have to pay more for repairs than for a new mechanism.
4. There are fuel jets for the main metering system. In such a situation, the fuel becomes over-enriched. Here you need to check the markings of the jets. This is a rather complicated procedure, so it is better to ask specialists for help.
5. The jets are too clogged. This is a fairly common reason, which is absolutely easy to solve. You need to clean the jets by removing the carburetor cover. This can also be done without removal, but in this case you will have to spend a lot of time and effort.
6. Malfunction in the forced idle economizer. The solenoid valve or other system mechanism may be faulty here. This usually occurs due to rough idling of the engine. You need to check the system and troubleshoot problems.
7. The engine filter is clogged. The fuel mixture is greatly enriched in fuel as air enters it through the filter element. It is necessary to clean the clogged elements, and then the problem will be eliminated. This must be done carefully so as not to damage anything.

It should be noted that too much fuel can be consumed not only due to problems with the carburetor.

It happens that such a problem is provoked by the following phenomena:

• faulty motor or injector;
• problem with engine thermal conditions;
• the ignition timing is incorrectly set;
• lack of tightness of fuel system elements. In this case, gasoline simply flows out of the gas tank;
• The car wheels do not release the brakes well. This is the most common reason for fuel consumption. This happens due to the fact that the rolling resistance of the machine increases;
• Wheel bearings that are too tight. In this case, the resistance to movement of the vehicle increases, resulting in fuel consumption;
• low tire pressure. This can be checked using a pressure gauge;
• wheel mounting angles are broken;
• problems with spark plugs;
• problems with the centrifugal and vacuum regulators.

High fuel consumption VAZ 2109 carburetor reasons

If gasoline consumption is high, you need to check the following systems:

↑

Compression and piston problems

If there is a significant increase in consumption, the first thing we recommend is to pay attention to the condition of the power unit. While driving, the engine performance is assessed by sound and visually. Signs of incorrect operation, as a rule, are: blue smoke from the exhaust pipe, extraneous sounds produced by the unit (ringing, knocking, rattling, etc.), decreased power, and others. If even one of the above symptoms appears, it is worth measuring the compression in the cylinders. However, experts recommend performing this procedure even if the engine operation is close to normal. Since with reduced compression, fuel consumption may increase without a noticeable decrease in the dynamics of the car. And in this case, it will not be possible to obtain normal fuel consumption by manipulating the carburetor.

Compression measurements are carried out only on a warm engine, approximately as follows. Initially, all spark plugs are unscrewed. The central high-voltage cable is disconnected from the distributor and secured approximately 1-2 cm from the ground. Next, a compression gauge is connected to the hole of the spark plug (on different devices the procedure is performed differently - the device’s fitting is screwed in or pressed against the hole). Upon completion of installation, one person turns the starter on command, and the second records the readings. The operation should be repeated for all cylinders.

The operating pressure indicators for different types of engines are individual and must comply with the technical documentation of the vehicle. Also, during normal engine operation, the difference in readings for all cylinders should not exceed 1 kg/cm2. If during the inspection it turns out that the pressure in the cylinders is below normal or the difference in readings is too large, the engine definitely requires repair. Typically, the root of the failure is either in worn rings or in a violation of the tightness of the valves. To find out this fact, you need to pour 3-4 ml into each cylinder. engine oil, then check the compression again. If the instrument readings have increased, this indicates wear of the rings; if not, then there is a loss of valve tightness.

Useful fact! If the problem has arisen in the rings, or rather in their coking, there is one tricky way - to eliminate it. 10 ml can be poured into the cylinders. a mixture of acetone, kerosene and motor oil in a ratio of 50/25/25, crank the crankshaft 2-3 times and wait 8 - 9 hours. Then measure the compression again. An increase in indicators will indicate decoking of the rings.

Carburetor malfunction

The next most common case is a faulty carburetor. In this case, the engine can operate normally and the compression will be within normal limits, and the consumption will be higher than permissible. First of all, it is important to inspect the air damper for its full movement. In normal condition, it should open completely (with the choke in the recessed position) and completely close (with the choke in the extended position). Otherwise, if the damper remains slightly open while driving, this promises a significant increase in fuel costs. Usually the problem is resolved by adjusting and cleaning the entire mechanism.

Solenoid valve failure

Another reason may be a malfunction of the solenoid valve or insufficient installation of the fuel nozzle holder. To eliminate this problem, the operation of the solenoid valve is checked (before checking, it is recommended to clean the idle jet). First you need to turn on the ignition and disconnect the wiring block from the electrical connection. valve and touch it to the positive terminal of the part. If everything is in order, then clicks should be heard when touching. If they are missing, the solenoid valve must be replaced. On a carburetor where there is no such valve, you need to check that the fuel nozzle is installed correctly. If it is insufficiently sealed, fuel can continue to flow in any range of engine operation, which is extremely undesirable.

It is also worth checking the tightness of the needle valve in the float chamber. When depressurization occurs, fuel overflows into the chamber, and therefore into the engine too. Detailed instructions for checking this fact are usually available in the technical documentation of the car and doing it yourself is not at all difficult. If the valve is faulty, it should be replaced.

The jets are clogged

Do not forget about the cleanliness of the air supply systems and the combustible mixture. When the jets are very clogged, the problem of excessive fuel consumption occurs very often. This is very easy to treat; just thoroughly clean all the jets, rinse the carburetor and replace the air filter.

Ignition fault

Consumption may also increase due to incorrect ignition adjustment. If the setting is off and the ignition is too early or too late, the consumption of the combustible mixture will be higher than normal. To do this, you need to conjure with the position of the distributor, turning it while checking the marks on the body. The technical literature of the model indicates the correct ignition timing for a given engine and, guided by this, you can safely make adjustments. After completing the adjustment, you need to perform a check. To do this, accelerate the car to a speed of 45 - 55 km/h and sharply press the gas pedal. In this case, a detonation effect should appear for a short time.

Sealed fuel system

Another problem may be related to a leaky fuel system. In simple terms, gasoline can leak through pores, leaky gaskets, or cracks in the fuel line. It is usually difficult to detect this since leaking gasoline quickly evaporates, especially while driving. During diagnostics, the car is driven onto an overpass or inspection hole. And with the engine running, all connections, tubes, hoses, etc. are inspected. for fuel leakage.

Car chassis

If the diagnostics of all the above systems did not produce results. You should pay attention to the chassis of the vehicle. Very often, violations in this system lead to increased fuel costs and decreased performance. As an example, this effect can be caused by overtightened wheel bearings, jammed or incompletely released brakes, misaligned wheel alignment, or a overtightened handbrake.

On the VAZ 2109 the carburetor has high fuel consumption reasons

• Yes, there are many reasons why gasoline can be wasted... the air filter, spark plugs, the amount of oil, your driving style, finally))) and just in case, check the entire gasoline line again... you never know.
• Well, maybe I don’t know much about this, but still, maybe you’re sucking air somewhere, and that’s where it’s eating.
• Maybe... the carburetor is sucking air, perhaps in the place where it is attached to the engine, try removing the carburetor, applying sealant and screwing it back on.
• Check if the needle is holding! Maybe you are pouring gasoline in buckets.
• Unscrew the spark plugs and see what they look like; if they are smoked, it means the mixture is rich; in general, you need to do this: adjust the valves, then the carb and ignition.
• My father fiddles with carburetors, no one goes to the salon, everyone goes to him! I talked to him, he said that there are a lot of reasons, everything needs to be looked at consistently! Look at the jets as written above, maybe others have stuck it in so that I can come to them again!) )) Look at the spark plugs for carbon deposits and check the gap! As for the sealant as written above, I personally don’t advise you, what do you think, why are there special pads there?))) It’s just from the bastards, when screeding it turns into a groove in places! Take it apart! into pieces and put it on a flat surface, you will see for yourself the gaps. The problem with air leaks can be easily solved, take new gaskets, a round emery stone of large diameter, so that all the surface on the stone is at once and slowly remove it in a circular motion! When I helped my father, we did this they did! Knowing the secrets of the carburetor mechanic, my personal advice is to find an honest worker through a good friend and talk to them like a human being so they can take a look, but in the salon they will just cheat you, and in general they do everything on the fly! And if you find a good carburetor mechanic, fumbling around, they’ll set you up so that you won’t eat much and you’ll squeeze all the juice out of the car!))) My father set it up so that in the city I eat little, but on the highway I fly as I want and at 100 to 5 liters))) Good luck with your decision Problems!
• Everything in the carb is the same garbage, it eats buckets of gasoline. Today I saw a black lady from the pipe and realized that it was an overflow. I revved it up to 6000 tons, because up to 3000 tons there was no blackness visible. Work plan for the float chamber - setting up the floats.
• My cravings have also dropped lately and are eating up a little more than before. They checked everything everywhere, everything is fine. They say that maybe it’s time to change the rings. (mileage 197,000)

Carburetor VAZ 2109 - high fuel consumption reasons

Today, each refueling costs much more than we would like. Therefore, most car enthusiasts try to use this precious resource as economically as possible. But it also happens that without visible changes, the “horse” begins to eat more than it should. In such cases, in order to eliminate excessive fuel consumption and stop the leakage of money to nowhere, it is important to take measures to repair the car. Find the cause and eliminate it.

As a rule, when a car runs out of fuel, it does not go unnoticed. As a result of this, carbon deposits may appear on the spark plugs, shots or pops in the muffler, bluish smoke, lack of roll-up, and much more. And so, we need to figure out why the faithful iron horse “began to eat like a horse.”

How to adjust the carburetor on a VAZ 2109 for minimum fuel consumption

Hello everyone, my friends asked me here on the drive, what is the secret of low consumption and what are the settings of my Solex 83 carburetor.

layout, 73 Solex, thanks to Andrey Cherny.

I will tell you in order what and how I did and tried, I will describe my thoughts about the setup.

There are 3 variants of accelerator pump elephants

and this is precisely the first question about my carburetor.

bent, right?

Well, here are the types of elephants:

standard

The standard elephant was hitting who knows where, and when the damper was opened, the drops that remained on the wall began to drip. I set it up so that when it opens, the jets shoot out without touching each other.

like this

what did all this give me, the Solex has 2 modes, I call them up to 100 km per hour

, and
after 100 km per hour.
Well, so if I drove in the city cycle without pressing the pedal to the floor, the car drove rather sluggishly! and when the pedal was pressed sharply, a simply indescribable failure appeared. Why? I noticed that despite the fact that we drive quietly and we have 1 chamber working, the supply goes to 2 chambers and in the second chamber there is stagnation of fuel, I checked at home and the stagnation was about 6mm of fuel. It was decided to abandon this elephant.

consumption is approximately 11 liters per 100 km in the city + failures.

90s tuning, my father gave it to me.

tuning 90 what it looks like in the carb

The elephant out of 90 saved me from failure, the car simply cruised up to 100 km/h, but the car became stupid after 100 km/h. Consumption increased to 12-13 liters.

I tried to adjust the elephant, but one horseradish at the beginning it turned out to be drops, and then a stream.

elephant setting

Well, why did the consumption increase? It seems like elephant 1 is the same 35 to 40, but the consumption has increased.

the answer is in disarray. As I understand it, due to the fact that the 1st elephant and the 2nd are at the same level, the air begins to pull fuel from the elephant, as it were, even if you do not press the gas pedal.

Elephant

here the elephants are at different levels and the fuel does not draw, it also makes it possible to configure the elephant so that the streams come out immediately when you lightly press the gas pedal, without touching the walls and without forming drops. Thus, the air and the mixture mix better, forming “fog”.

jet settings

When setting up, do not allow the jets to cross, this will lead to the formation of a drop.

my choice fell on the Travnikov elephant, with it the consumption decreased to 10 liters, and the car was a gem up to 100 km/h and after 100 km/h the elephant costs 35 to 40.

The next step was cleaning the carburetor and channels, with blowing.

Regarding the idle speed and the idle air valve.

there is a small nick with this jet on the valve.

jet and valve

trick, the next one my jet was 35

and no matter how you set the idle speed, the car didn’t seem to accept it, the idle speed constantly jumped,
it was cured by replacing the jet with a 52
, the speed leveled off.

there is one more problem with this valve, oh I’m tired of it... wow...

If you tighten the idle too much, it will disappear; if you tighten it too weak, you will either suck in air, or the needle will not close enough and the fuel will go empty.

the ratio of fuel and air jets in my car... the sweetest...

in the primary chamber there are the following 92.5 fuel to 135 air. (per liter 15 liters of air per 1 liter of fuel)

in the secondary it costs 92.5 fuel to 125 air. (according to the literature, 13 liters of air per 1 liter of fuel, the mixture is over-enriched, not significant, which is why the car continues to pick up speed after 100 km per hour, and does not stall)

jet setting table for Solex

table

air jet (long) and next to fuel jet (short)

Regarding the floats, I have them configured like this

from the gasket to the top point of the float 3.5 cm. IT IS VERY IMPORTANT TO MEASURE NOT WITH A RULER LIKE THIS, BUT WITH A STANGEL

I would like to note that the car started to sputter and began to consume 5 liters per 100 km, now in November it became 6.4 in the city, outside the city it consistently consumes 4.5 at a speed of 100 km/h

I achieved maximum effect due to the fact that:

I drive smoothly like a grandfather, without “sport mode” and the average speed is 60-70 km per hour in the city, I tried to “drive”, I realized, well, I’ll gain 5 minutes of time, and I’ll burn gasoline with the brakes, I decided to drive at this optimal speed.

On the highway I drive 90 - 100 km per hour.

and measurements were made at these speeds.

My spark plug gap is 0.7, stroboscope ignition, tire pressure 1.9, balancing is present.