High fuel consumption on the VAZ 2107 carburetor - reasons

VAZ 2107 fuel consumption per 100 km carburetor

To talk about whether a car consumes a lot of gasoline, you need to know what the consumption should actually be.

Depending on the engine installed on the car, the consumption may be as follows (for more details on the consumption of carburetor cars, see our fuel consumption table for carburetor cars):

The difference is obvious. However, the power of the first engine is 72 hp. , and the second one is 80. That’s why it consumes so much gasoline. However, in the case when there is an increase in consumption above the nominal, it is worth talking about too much fuel consumption.

VAZ 2107 injector

After they released a car with distributed injection, car enthusiasts are interested in what the fuel consumption of the VAZ 2107 (injector) is. The reason for this curiosity lies in the higher fuel consumption than the manufacturers indicate.

The VAZ car is familiar to every Russian. Since 1982, the VAZ 2105 was replaced by a new model - the “seven”, that is, the VAZ 2107. This was visible in the changes that the car underwent.

They hid in changing the appearance of the hood, adding some details inside the car, and an aggressive radiator grille appeared. City of production – Nizhny Novgorod, Russian Federation.

The fuel consumption of a VAZ 2107 per 100 km with injectors of the AI-92 and AI-95 brands is presented as follows:

• on the highway - 6.7-8.5 liters;
• in urban conditions - consumption increases to 11.5 liters.

Plus, the factors of gasoline quality and the driving style of the car enthusiast are added to everything. Therefore, some have more consumption, others have less.

How does this system work?

In order to correctly determine in the future why you are using a lot of fuel, you need to know how the engine power system works. With this knowledge, you will already know how to reduce the fuel consumption of your UAZ.

After air enters the intake manifold, the volume will be measured by a certain sensor. All this information will then go to the ECU. The process will receive the task of injecting fuel through an injector, or, to be precise, through injectors. Everything that is released into the atmosphere is detected by the exhaust measurement sensor. The data obtained helps determine the actual fuel consumption.

Already with knowledge about the operation of the entire system, it is easier to find the exact reason for the unreasonably high consumption of gasoline.

Reasons for overspending

To determine the causes, technicians use a special device - a tester. They check the electronic control unit and sensors. There are several main reasons when fuel consumption may increase:

• Aggressive driving.
• Precipitation on the walls of nozzles, measurement of their flow area.
• Incorrect operation of the sensors.
• The glow number of the spark plugs does not correspond to that stated by the manufacturer.
• The car's air engine is clogged.

We diagnose ourselves

You can find out for yourself how much fuel is actually consumed. To do this, you need to fill a full tank of gasoline, which is 39 liters, and drive until the gas level indicator is in the middle. This will take more than one hour of moderate driving. Then we go back to the gas station.

We calculate: divide the volume of fuel poured by the mileage on the odometer. This way you will find out the average gasoline consumption of a VAZ 2107 per 100 km. If fuel consumption standards are exceeded, you yourself will not be able to diagnose the exact cause of the problem. Then it is recommended to go to a service station.

Statistics

The fuel consumption of a Lada 2107 with an injection engine is perfectly shown by statistics provided by the manufacturer and figures received from car enthusiasts.

The manufacturer claims that when driving on the highway, the car will normally consume 9 liters of gasoline, but in reality we see that consumption does not exceed 7.75 liters.

Driving in urban conditions should consume only 9.70 liters, but here the figure exceeds 10.25 liters. With a mixed type of driving, the readings from the manufacturer and the car enthusiast practically coincided, the former had a consumption of 8.50 liters, and the latter - from 8.82 liters. However, we see that in practice the consumption is higher.

The passport does not indicate how much gasoline is consumed when driving off-road. Having checked it ourselves, we see that such driving requires more than 9 liters of fuel.

Engine versions

Model VAZ 2103

The first engine that was installed on the “seven” was 2103, 75 hp, 1.5 liters. The results showed that in this carburetor car the speed does not exceed 155 km per hour. At the same time, fuel consumption within the city is 11.5 liters.

Model VAZ 2104

New engine – 2104, 72 hp, 1.5 l – injection. The manufacturer claims that a car with this engine can reach a maximum speed of 150 km per hour. But the fuel consumption of the VAZ 2107 decreased to 8.5 liters. \

Model VAZ 2106

Engine 2106, 74 hp, 1.6 l - the most popular among other injection versions. The maximum speed reaches 155 km/h. When driving on the highway, the fuel indicator dropped to 7 liters. Over the 7 years of sales of this engine, the figure was equal to the sales of carburetor versions over 23 years.

In these examples we can see that the fuel consumption of the 2107 injector is lower than that of the carburetor.

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Engine power system

Conventionally, the power supply system can be divided into two elements:

1. Air supply;
2. Fuel supply.

Let's consider the first option. If your car consumes too much gasoline, the problem may lie in a dirty air filter. All drivers should know that without oxygen, fuel combustion is impossible. Fuel consumption should be carried out in a ratio of 1 kg of fuel to 15 kg of air. This parameter is not always present, but should have approximate values.

If the air filter is dirty, it will turn out that fuel combustion will be poor, which means the engine efficiency will decrease, which is the reason why the VAZ 2107 carburetor has high fuel consumption, but there are other reasons, which lie in the operation of the carburetor itself .

If it is not set correctly, the Lada will have an air/fuel mixture that is too rich or too lean. In both cases, it consumes a lot of fuel and noticeably loses power. To get rid of the problem, you need to configure the system correctly. If the VAZ 2107, or more precisely, its carburetor, still consumes a lot of gasoline and has difficulty starting, then you should check the cleanliness of the fine and coarse filters.

Proper Fuel Saving Techniques

To ensure that the RT is not too large, it is first necessary to monitor the technical condition of the car. Even the condition of the braking system affects increased fuel consumption - if one of the working cylinders is faulty, the car will begin to slow down, and the driving resistance will increase in this case.

It is important to maintain the required tire pressure - when it decreases, resistance also increases, and accordingly, fuel consumption increases by 2-4%, it all depends on how low the tires are. But it’s also not a good idea to overinflate tires - the car starts to drive harshly, and even on a slippery road, the braking distance increases.

If malfunctions appear in the engine or fuel system, you need to carry out diagnostics to find out the cause of the problem. And adjusting the carburetor and setting up the fuel injection system should be trusted to specialists.

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Ignition system

Diagram of a non-contact ignition system: 1 - non-contact sensor; 2 — ignition distributor sensor; 3 — spark plugs; 4 - switch; 5 - ignition coil; 6 — mounting block; 7 - ignition relay; 8 — ignition switch.

If the carburetor consumes gasoline in nominal quantities, then the problem may be hidden in the ignition system (the correct adjustment of which is discussed in the article on adjusting the ignition on the VAZ 2107). The check should begin with a visual assessment of the vehicle's behavior.

Popping noises in the muffler or detonation at low speeds may indicate poor spark plug performance or incorrect timing. Unscrew the spark plugs and check their color.

Black carbon deposits indicate that the ignition system is misfiring, when fuel is supplied but does not ignite. This indicates that the candle is not working. If all the spark plugs are the same color, then the ignition is late and needs to be adjusted.

The white color of all candles indicates a poor air-fuel mixture when the fuel consumption of a VAZ 2107 with engine 2106 or 03 (carburetor) exceeds 10 liters per 100 km. In this mode, there is early ignition, the engine eats a lot of air, but is forced to burn gasoline to gain the required speed.

VAZ fuel consumption.

VAZ fuel consumption is always acceptable. The developers are seriously thinking about reducing fuel consumption for different VAZ brands.

VAZ cars are domestically produced cars. VAZ is a Volga automobile plant, it is located in the Samara region in the city of Tolyatti. VAZ cars are distinguished by moderate fuel consumption and affordable prices.

Data on VAZ fuel consumption are described below in the table on fuel consumption of VAZ cars. VAZ cars are not only a means of transportation, but also an integral part of everyday human life.

Fuel consumption of a VAZ depends on its modification (brand), driving style and time of year. The table below shows the average fuel consumption of the VAZ brands of the 2107, 2114, 2110, 2106, 2112, 2109, 2115 family.

Driving in neutral gear

Almost all VAZ 2107 cars equipped with a carburetor engine with an economizer have the ability to turn off the fuel supply when releasing gas while in gear, which was not the case with early versions of the Lada. In this connection, there is no need to drive in neutral gear, supposedly to save money.

There are no savings here. When the gearbox is in neutral, the speed drops, and the autonomous idle system comes into play, which, when the throttle is closed, supplies the engine with an additional portion of fuel so that it does not stall. In this mode, the fuel system consumes a lot of gasoline.

Aerodynamics of the car

Many Russian drivers have already noticed that the fifth model has much lower consumption due to its aerodynamic properties. We are talking about a radiator grille that is flush with the hood, and does not stick out, as on the seven. The high “nose” of the grille creates additional air resistance, which leads to excessive fuel consumption. In this case, it is recommended to install the hood and grille from the VAZ 2105.

The second reason is a roof rack that has too much protruding cargo. Tall suitcases, boxes and other items carried on the roof also make it difficult for the vehicle to move, causing the engine to consume much more gas than it should. The best way out of the problem is a trailer that hides behind the car, is lightweight and can hold more cargo than a trunk.

Open windows when driving on the highway also interfere with normal gasoline consumption. If the car is hot, you can use central air ducts, which open at speed and set the flow of cold air, which is much more convenient and economical.

Engine versions

Model VAZ 2103

The first engine that was installed on the “seven” was 2103, 75 hp, 1.5 liters. The results showed that in this carburetor car the speed does not exceed 155 km per hour. At the same time, fuel consumption within the city is 11.5 liters.

Model VAZ 2104

New engine – 2104, 72 hp, 1.5 l – injection. The manufacturer claims that a car with this engine can reach a maximum speed of 150 km per hour. But the fuel consumption of the VAZ 2107 decreased to 8.5 liters.

Model VAZ 2106

Engine 2106, 74 hp, 1.6 l - the most popular among other injection versions. The maximum speed reaches 155 km/h. When driving on the highway, the fuel indicator dropped to 7 liters

. Over the 7 years of sales of this engine, the figure was equal to the sales of carburetor versions over 23 years.

In these examples we can see that the fuel consumption of the 2107 injector is lower than that of the carburetor.

“Seven” cannot be classified as a “gluttonous” car. However, current gasoline prices make even small car owners think about fuel consumption. The fuel consumption of the VAZ 2107 depends on many factors, ranging from the type and condition of the engine to driving style. To know how to save on fuel, let's look at these issues in more detail.

Aggressive driving style

Many car owners push their Lada into too high speeds in order to shift to a higher gear. The classic engine is not designed for this driving style. It is designed for a quiet ride, since the car is not sporty and does not tolerate high speeds.

The optimal shift mode should be in the range from 2500 to 3000 rpm. If you turn the engine up to 3500, then in addition to increased consumption, you can also get a decrease in the resource of the power plant.

Tire pressure

The last reason is one of the most common - low tire pressure. To make it clearer, just lower the wheels of the car and try to push it. Everyone knows that this will be extremely difficult.

The same situation occurs with the engine when it tries to move a car with flat tires. It has to expend more energy, which means it needs more fuel.

Now it’s clear why the VAZ 2107 carburetor has high fuel consumption. The reasons for this phenomenon can be easily eliminated and will not require large expenses. It is enough to monitor the condition of your car.

General tips for operating a car

To minimize the influence of minor factors and achieve real fuel savings, follow a number of simple rules:

1. Fill with gasoline with an octane rating of at least 92 according to the manufacturer's recommendations. If you accidentally come across low-quality fuel, try to drain it from the tank and refuel with normal gasoline.
2. Maintain the recommended tire pressure of 1.8-2 atm depending on the load.

   
   Air pressure must be checked at least once a week

3. During the cold season, warm up the power unit before driving. The algorithm is as follows: start the engine, let it run for 2-5 minutes (depending on the air temperature), then start driving slowly in low gears.
4. Do not delay repairing the chassis; follow the procedure for adjusting the camber angles of the front wheels.
5. When installing wider tires, replace stamped wheels with alloy wheels. In this way, it will be possible to compensate for the increase in the weight of the wheels and improve the appearance of the “classic”.

   
   Installing alloy wheels instead of steel allows you to lighten the wheels by a good ten kilograms

6. Do not weigh the car with unnecessary external elements that increase the aerodynamic drag of the environment. If you are a fan of styling, choose a beautiful and at the same time streamlined front body kit, dismantle the old bumper.

Unlike modern cars, where the filling pipe is equipped with a mesh, emptying the tank of the “six” is much easier. Insert the hose into the neck, lower it into the container and use suction to direct the fuel into the spare canister.

Air resistance has a significant impact on engine fuel consumption. If we compare the movement at 60 and 120 km/h, then the aerodynamic drag increases by 6 times, and the speed - only by 2 times. Therefore, the triangular side windows installed on the front doors of all Zhiguli cars add 2-3% to the consumption when open.

Find out whether it is possible to refuel a full car tank: https://bumper.guru/klassicheskie-modeli-vaz/poleznoe/pochemu-nelzya-zapravlyat-polnyy-bak-benzina.html

Video: how to save gasoline in simple ways