VAZ 21099 in detail about fuel consumption

In 1990, the production of the well-known “99” - VAZ 21099 - began. 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.

How to calculate gasoline consumption per 100 km?

Any driver is interested in the question of how many liters of gasoline his car “eats.” Reading the characteristics of a particular model, we see fuel consumption, which shows how much gasoline the engine needs to travel 100 kilometers in the urban or extra-urban cycle, as well as the arithmetic average of these values ​​- fuel consumption in the combined cycle.

Nominal and actual fuel consumption may differ, usually not very significantly.

1. technical condition of the car - while the engine is being run-in, it consumes more fuel, then the consumption level decreases to the norm specified in the instructions, and as it wears out it increases again;
2. riding style is an individual matter for each individual;
3. weather conditions - in winter the engine consumes more fuel, in summer - less;
4. use of additional energy consumers;
5. aerodynamics - when the windows are open, the aerodynamic properties decrease, air resistance increases, and accordingly more gasoline is needed;
6. aerodynamic properties can be improved by installing spoilers and streamlined elements.

You are unlikely to be able to calculate the exact standard fuel consumption values, down to the milliliter, but you can calculate the approximate consumption for different driving conditions very simply, you don’t need to be a great mathematician for this, you just need to remember the mathematics course for the third or fourth grade and know that these are the proportions.

The calculation formula used by flow calculators is very simple:

Divide the displacement by the mileage and multiply by one hundred - l/km * 100.

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 have 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 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.

VAZ 21099-20 1.5 MT 78hp

Fuel consumption rate per 100 km

Not the most popular version, despite the engine technical data typical for Russia. As in other modifications, the unit operates with a 5-speed manual transmission on gasoline. He freely accepts AI92, although his passport requires 95. Consumption is even more modest than that of a similar unit with 70 horsepower: city – 8.8 liters, highway – 5.4 liters. Maximum acceleration is up to 156 km per hour.

Owners about fuel consumption

• Mikhail, Belgorod. For five years I had a 1.5-liter 74-horsepower 99 (2003 onwards). I liked going to the dacha. It takes a little off-road without any problems, and the appetite hardly grows (consistently 9.5 liters). For example, Niva on the same road consumes almost 13 liters per hundred.
• Roman, Izhevsk. I tried chipping my 1999 1.5 MT. Almost nothing has changed, although many talked about saving fuel. The ninety-ninth ate 9.5 liters in the city, and still eats it. Perhaps it’s half a liter less on the highway (6 instead of 6.8), but my wallet laughs at such savings.
• Andrey, Kursk. I learned to drive a 1.5 manual 2001. It’s hard to imagine a better car for a beginner. I fill up with 10 liters and don’t think about fuel for 3-4 days. At the same time, I drive about 60 km/h in third gear. Very economical and without unnecessary hassles.
• Stepan, Rybinsk. Of course, traveling long distances in the 99 is difficult due to the lack of comfort. I had a regular one and a half liter engine (74 horses). The car is old (2000), but it made it to the Black Sea. I needed two and a half tanks (about 100 liters) to get to the resort. At the same time, the consumption according to the meter rarely exceeded 7 liters.
• Alexander, Tambov. 21099 2002 1.5 74 hp I had a serious problem with fuel once. I knew that it was better not to fill up at this gas station, but for some reason I stopped by. As a result, there is carbon deposits on the spark plugs and consumption jumps to 12 liters per hundred. And so it lasted a little less than 10 liters.

Fuel consumption, accessibility and low cost of repairs are the main advantages of the VAZ 21099. Although the time of this sedan has long passed, because today the car enthusiast is no longer satisfied with simplicity and efficiency. Manufacturability and ecology are at a premium. By these parameters, the 99th remained in the last century.

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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.

Gasoline consumption VAZ 21099 - carburetor. Fuel consumption rate

VAZ 21099 in detail about fuel consumption

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:

1. year of manufacture of the car;
2. on the cleanliness of the filters;
3. filled with good quality oil;
4. on engine volume;
5. on the condition of the injectors;
6. depending on the type of ride;
7. maneuverability;
8. 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 every morning and evening you have to stand in traffic jams for a long time, then it is better to turn off the car so that there is no overheating and excessive consumption of gasoline. Fuel consumption of the Lada 21099 on the highway at average air temperature is about 7 liters , this is cost-effective fuel consumption. VAZ is a financially convenient car if you monitor its technical condition.

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:

1. poor or incomplete opening of the carburetor damper;
2. lack of oil in the gearbox - leads to a reduction in transmission;
3. the ignition timing is poorly set - early or late ignition reduces power;
4. the vacuum accumulator sensor is faulty;
5. 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:

1. clean the fuel filter;
2. check for fuel leaks;
3. adjust the carburetor;
4. configure lambda umbrella;
5. 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.

Why do the calculations?

Periodic fuel consumption calculations are useful for several reasons:

1. Budget planning. You will know how much of your salary should be set aside for gasoline.
2. Organization of long trips. If you have a long journey ahead, you can calculate in advance whether there is enough fuel for it or whether it is better to refuel before the road, or even take the tank with you.
3. Diagnostics. If fuel consumption differs significantly from the previous time, this may indicate a problem with the car (if, of course, travel conditions remained approximately the same).
4. Testing. Once you receive the machine for a preliminary test, you will determine how expensive it will be to maintain. The obtained value may differ from that declared by the manufacturer due to the climate and topography of your region.

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 21099 fuel consumption reviews

The VAZ 21099 can safely be called a Russian car, unlike its Soviet counterparts in the model range. The front-wheel drive sedan was delivered to the assembly line at the end of 1990. Popularity came quickly, and, despite the end of production in 2005, the model did not leave the market for new cars. At the facilities of the Ukrainian ZAZ, the people’s favorite “99th” received a second life. The sedan was completely discontinued from production only in 2012. For a long time, carburetors were paired with the power plant on the 21099. They were subsequently replaced by injection versions.

What does engine volume mean in a car - 1.2 l, 1.4 l, 1.6 l, etc.?

The displacement of an engine largely reflects its power and other operating parameters.

And, first, we must decide that - 1 liter = 1000 cc (cubic centimeters or cm3).

So, a car with a 1.2 liter engine will have the following volume:

1.2 × 1000 = 1200 cc,

Similarly, let’s take a car with an engine capacity of 1.4 liters, respectively a volume of 1400 cc and so on.

The engine displacement is equal to the sum of the displacements of all the engine cylinders, so if a 1.2 liter car has a 4-cylinder engine, this means that the volume of each cylinder is 1200 ÷ 4 = 300 cc. cm.

The volume of the cylinder – V, is determined by the formula:

where D2 is the squared diameter of the cylinder and h is the stroke length of the cylinder.

So when you calculate the volume of each cylinder of a 1200cc 4 cylinder car. cm, using the above formula, measuring the diameter and stroke, you end up with 300 cc. cm or a little more, but very close to 300 cm3, since the number π is not an absolute number.

Now, about the technical part

:

What does it matter?

In general, an engine's performance (power, torque, acceleration, etc.) is entirely dependent on how much fuel it can burn as the piston reciprocates inside the cylinder; that is, when it moves from the highest point of the cylinder, called top dead center, to the lowest point of the cylinder, called bottom dead center.

But, there is one catch!

You can't add an infinite amount of fuel, because you need air to fully burn that fuel, and the unburned fuel doesn't go into the exhaust pipe and detonate there.

This means that to get more performance, you need to burn more fuel, and in order to burn more fuel, you need to suck a lot of air into that cylinder.

The simplest way to do this is to have a larger capacity cylinder that will hold a larger volume of air, and thus be able to burn more fuel, providing better performance.

However, keep in mind that a larger engine also means it will be less fuel efficient.

Because it will have to burn a certain amount of fuel to keep running and will consume more fuel even at low speeds and engine speeds when you don't really need those performance.

And although there are other ways to increase performance, increasing engine size is the simplest, and most primitive way to do it.

However, existing more modern technologies such as turbocharging, or increasing the compression ratio using direct injection, are much more effective methods as they do not have a significant effect on increasing fuel consumption.

Thus, today, the formula - “a more powerful engine is a better engine”, in fact, no longer works.

Because, thanks to improved technology, small engines have become more powerful and at the same time economical!

Source

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 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.

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 a timely manner in the range of 2-3 thousand revolutions, and move on the highway at a speed of 90-100 km/h. 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.

Owner reviews

There are much more positive reviews than negative ones, so purchasing a VAZ 21099 is a good economical option for residents of cities and villages. With consistent, calm and purposeful driving, the car does not break down so often, and in terms of fuel consumption it is satisfactory - that’s what drivers write. They also indicate that when the engine overheats, the cylinders are poorly filled and power decreases, but this, first of all, depends on the owner.

Source: rasxodtopliva.ru

Practical method for calculating fuel consumption

At the same time, there is a very simple way to calculate fuel consumption yourself, without resorting to outside help:

1. You need to come to a gas station and completely fill the fuel tank, noting the mileage of the car.
2. When, after some time, all the fuel has been used up, you need to completely refill the tank at the gas station again and record the mileage at that moment. The result yields two basic indicators: the volume of gasoline consumed “O” (it is equal to the volume of the fuel tank) and the distance “P” that the car traveled between two full refuelings.
3. Next, a formula is used that is well known and used by experienced drivers: fuel consumption “RT” is equal to the indicator obtained as a result of the algorithm / “P” x 100.

A specific example should be considered. Let's assume the tank volume is 40 liters, and the distance the car travels between two fill-ups is 500 kilometers. Then, after calculating “RT” = “O” / “P” x 100, we find that “RT” is equal to 8 liters per 100 kilometers. This is the real expense.

You can also use this local method - fill in 10 liters of fuel and drive exactly 10 kilometers through different terrain: city streets, rural roads, highways, etc. Then correctly measure how much fuel is left. Let's assume that 700 grams of fuel had to be spent on this test trip. Then its consumption per 100 kilometers will naturally be 10 times greater and amount to 7 liters.

What is the fuel consumption of the VAZ-2109 (injector, carburetor)

Initially, the technical specifications published on the manufacturer’s website help determine the predicted gasoline consumption of cars of the specified model. The fuel consumption of the VAZ-2109 varies depending on the modification, as well as the type of engine (carburetor or injection). According to statistics, depending on the above-mentioned conditions, gasoline consumption per 100 kilometers ranges from 5.7 to 8.6 liters. Among the factors that can influence this indicator are the time of year (in winter the volume of consumption increases), as well as the specifics of the road - a city or a highway.

VAZ 21099 in detail about fuel consumption

In 1990, the production of the well-known “99” - VAZ 21099 - began. 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.

How to calculate average fuel consumption figures

Knowledge of the basics of car operation allows us to conclude that the consumption of branded gasoline fractions differs at different points in operation. The difference is especially noticeable when the car is equipped with on-board electronics with an instantaneous fuel consumption indicator. It is quite difficult to focus on the rate of gasoline consumption per 100 km, since fuel combustion occurs more actively when starting from a standstill, accelerating and idling.

In addition to the on-board computer, you can calculate the level of expenses using a specialized calculator. A complex formula is used for the calculation. With its help, results are obtained that are as close as possible to real data. In practice, it is not always convenient to use the formula for calculating gasoline consumption. In addition, not all car models are equipped with on-board electronics.

Simple and standard calculation

Without calculation tools and smart indicators at hand, you can use the driver's practice. The easiest way to calculate gasoline consumption is the following sequence of actions:

• Before the trip, the gas tank is completely filled;
• The distance to a complete stop is measured. The speedometer or TRIP function will help with this;
• The vehicle instructions indicate the tank volume;
• To calculate average consumption, you will need to divide the distance traveled by the number of liters of gasoline available before starting the trip.

A simple calculation allows you to see the average fuel burn rate over a full range. It fully takes into account the driver’s driving style, as well as transitions in the city and on the highway. A more accurate calculation of gasoline consumption per 100 can be obtained using a standard method.

The formula looks like this:

Standard consumption = 0.01*manufacturer’s base consumption*current mileage*(1+0.01*correction factor).

The dynamic multiplier affects whether the standard value decreases or increases. The coefficient depends on the following parameters:

• Air conditioning operation;
• Predominant driving in the city;
• It is important to calculate the route for different regions;
• Reaching the first critical mileage marks, for example, 100,000 km.

Calculation of fuel consumption per 100 km using an algorithm

The simplest method for planning trips requires practice. You need to calculate the consumption as follows:

For example, a car drove 650 kilometers on a full tank. This required 45 liters of fuel. The average consumption between refills will be 45/650*100=6.9 liters. This is the average consumption typical for cars with an automatic variable transmission. Gasoline consumption using the formula allows you to roughly calculate your expenses and the distance to the next gas station. Information obtained using a simple algorithm is usually sufficient for long journeys.

Controlling fuel costs using satellites

In the activities of commercial and budgetary organizations, it is extremely important to maintain order, especially when calculating corporate costs for transport. Driving in cars with satellite trajectory control allows you to control drivers along the entire route.

Among the functions of navigation equipment is monitoring of vehicle performance, including the remaining fuel in the tank. The surveillance operator analyzes the situation. If consumption ceases to correspond to the mileage, this may cause fuel drainage along the way or serious malfunctions in the car.

Alternative calculation methods

Other methods can be used to determine the vehicle maintenance budget. If the car owner knows the route of trips and their number well, he will intuitively plan the time of the next refueling. Most likely, the date of the next fuel purchase will be carried out at the same time intervals.

You can also calculate how gasoline consumption is going at specialized stands. With this method, not only the rate of consumption is controlled, but also the possible reasons for deviations from standard values. Professional diagnostics help determine the quality of fuel and identify malfunctions of the engine or other related systems.

Data sheet consumption values ​​for modifications 2109

During the production history of the Lada Nine, it was produced with five types of eight-valve engines, which differ slightly in terms of fuel consumption. Below are the engine models and their rated values ​​for gasoline consumption per 100 km on a combined cycle.

Injection engines straight from the VAZ 2109 factory have higher fuel consumption than carburetor engines. But during operation, the fuel consumption of an injection engine does not increase as much as that of a carburetor engine, so we will not consider the fuel consumption of the VAZ 2109 injector in detail. Let us dwell on the reasons that often cause increased fuel consumption on modifications of the Lada Samara with a carburetor.

Using fuel with a VAZ carburetor

The amount of substance used depends directly on how the modification of a number of UAZ cars works - on a carburetor or on an injector. First, let’s determine the fuel consumption of the VAZ 2109 carburetor, since it is believed that this type of system has the highest consumption:

• 2109 fuel costs in the city are 8-9 liters per 100 km;
• gasoline costs on the highway - 6-7 liters per 100 km, at a speed of 90 km/h;
• gasoline costs on the highway are 7-8 liters per 100 km, at a speed of 120 km/h.

Malfunction of valves or flaps in a VAZ

One of the main factors in increasing the indicator is a closed or not fully open air damper. You should always check whether it is in the correct position - the handle is facing the owner, and the part itself is in a vertical position. The same problem with an improperly closed solenoid valve or fuel nozzle leads to increased fuel costs for VAZ.

If the sealed mode of the needle valve is violated, excess portions of liquid enter the cylinders.

Problems with EPHH

If the XX system jets have a diameter that is too large, then too concentrated, supersaturated oil will enter the combustion chamber. Their contamination also causes increased consumption and requires immediate cleaning. An even more important factor is the breakdown of the forced idle economizer, which requires immediate repair.