VAZ 2115 High Fuel Consumption Injector Reason • Power system

16.11.2012

Gasoline flow sensor

My VAZ 2114 (1.5) 2005 with a mileage of 104 thousand uses about 12 liters per hundred in the city, but it’s still November, so what can we expect in winter? But my father’s 14th with a 1.6 engine consumes a stable 8.1 liters per 100 km in the city. And I asked myself: “Why is the fuel consumption so high on my 2114?” And I went looking for an answer on the Internet, as a result of which this article was created

According to the passport, Samara-2 should consume 7.6 liters per 100 km in mixed mode, in the city - no more than 9 liters. If your readings are as high as mine, then it's time to address the increased fuel consumption.

The reason for the high consumption of gasoline, both in VAZ and in other cars, may be the engine management system: it includes an Electronic Control Unit ( ECU , popularly known as the “brains”) and various sensors and drive mechanisms.

Checking the entire engine management system is quite difficult, and it is better to entrust this work to professionals, but if you want to solve the problem yourself, then go for it. Check the mass air flow sensor: Read the article How to check the mass air flow sensor on a VAZ?

The cause of increased fuel consumption can also be a faulty fuel system, namely the fuel pressure in the fuel system (How to check the pressure in the fuel system?):

1. Clean/replace the fuel injectors (Cleaning fuel injectors. 4 ways/ How to remove injectors?).
2. Replace the fuel pump.
3. Replace the fuel filter (Replacing the VAZ fuel filter).
4. Defective.
5. The phase sensor (PF) is faulty.
6. The oxygen sensor (Lambda probe) dies.
7. A clogged air filter will increase your fuel consumption by about 3 liters. So it’s better to replace it once again; it costs about 120 rubles. How to replace the air filter?

It also doesn’t hurt to check the following elements:

• Candles - they should not be sooted. Read the article: How to replace spark plugs? Step-by-step instruction.
• High-voltage wires: read the article How to check high-voltage (HV) wires?.

Increased gasoline consumption may be due to low compression in the engine (How to measure engine compression correctly?). Consumption is also affected by an incorrectly set ignition angle and incorrect valve timing.

At worst, check the tire pressure, they also affect fuel consumption. (What pressure should be in the tires of a car?)

VAZ 2115 – fuel consumption data

In 1997, the extremely successful line of Lada Samara models was replenished with a new series, codenamed Samara 2. One of the first models of the updated family was the VAZ 2115, which attracted potential buyers with reduced fuel consumption per 100 km, improved appearance, and a more comfortable interior than its predecessors. without unnecessary glamor. The car turned out to be so popular that it was produced until 2012, enjoying stable demand. Among its advantages are noted:

1. Updated design that compares favorably with previous models.
2. Improved optics.
3. Expanded range of gasoline engines.
4. High reliability and maintainability.
5. Installation of a modern fuel supply system.
6. Reliable suspension, adapted to domestic roads.

Advantages of the machine

For more than ten years, developers of modern cars have been resorting to a new type of fuel supply. Outdated carburetors have been replaced by injectors that increase engine efficiency. At the same time, they significantly reduce the flow of fuel into the tank, which significantly saves fuel consumption.

VAZ has such capabilities, which positions itself as a reliable, economical sedan modification vehicle. The fuel consumption of the VAZ 15 per 100 km is significantly less than that of other cars of a similar pricing policy.

INCREASED CONSUMPTION, WHAT TO DO – Power system

• Vladimir, Novocherkassk. I have a VAZ 2115 produced in 2007 with an eight-valve 1.5 MT. The main advantage of this car is its amazing reliability. The dynamics, of course, are mediocre, but in mixed mode, even in winter, fuel consumption does not exceed 9 liters per hundred, which completely suits me.
• Nikolay, Tver. Lada 2115 with a 1.5 engine with 78 horsepower is an excellent budget car. Compared to other cars, repairs cost a penny, it handles excellently, and in the city it confidently stays in traffic. Comfort is not enough, but I'm ready for it. To reduce heating in winter, I bought a car blanket, now the car takes 8.5-9 liters per 100 kilometers.
• Ivan, Petersburg. VAZ Lada 2115 with injection 1.5 MT, drove 200 thousand km. The car drives briskly, both in the city and on the highway. The interior is spartan, but enough for me. Fuel consumption on the highway is 6 liters, in the city it reaches 10.

1.5 engine with an injector • But if your VAZ 2114 has high fuel consumption, then this is a reason to carry out diagnostics and most likely repair the systems of your car.

Engine 1.6 with injector

A modification with a 1.6 engine equipped with an injector produces 80 horses and accelerates the car to hundreds in 13 seconds. The maximum speed of the car is 160 kilometers per hour. The engine is fueled with AI 92 gasoline, the fuel consumption indicator for the VAZ 2115 in this configuration is:

• on a busy road 10.1 l;
• mixed mode 7.6 l;
• on a free road 5.7 liters.

Real gasoline consumption of VAZ 2115

• Peter, Ekaterinburg. For several years I have owned a VAZ 2115 1.6 with 80 horsepower. When accelerating to 150 km/h, the car holds normally, although there is a slight vibration in the steering wheel. True, consumption rises to 14 liters. At a cruising speed of 100-110 km/h, you can comfortably fit in 7 liters, and in traffic - 10.
• Yuri, Moscow. My first car, with their 90s design, I really like it. I have already driven 120 thousand km, during all this time the VAZ 2115 even broke down, the repair cost a penny. The 1.6 engine pulls briskly both at intersections and on the highway. If a new generation of the car were released, I would definitely buy it. Fuel consumption is 10 liters in mixed mode.
• Mikhail, Stavropol. I bought a Lada 2115 secondhand in 2010, although it was in good condition. After a light repair, I haven’t had any problems for many years, only consumables are changed. I like the 1.6 engine, which pulls well in any speed range. Fuel consumption is 9 liters per 100 kilometers.

Specifications

This is an improved model of the well-known VAZ 21099. The sedan that replaced it has become more popular than its predecessor. It features a number of positive innovations, which include a more modern assembly, economy, and the necessary comfort for the driver.

In Samara, the front optics have been modernized, the design has become streamlined and modern, and the stylish updated trunk lid attracts the attention of many consumers. The modified sedan can be equipped with electric windows, fog lights or heated seats. The on-board computer has become a classic feature for this car.

The principle of operation of the fuel system

High fuel consumption on the VAZ 2114, then follow the instructions below. Of course, few people would want to drive such an “expensive” car and throw money away. There are not many options: go to an official service center and let them fix the shortcomings, or do it yourself, if you know a lot about it. Only in the latter case you need to be especially careful, since you can violate the warranty period, if it still exists. So, if you decide to fix everything yourself, then first you need to outline the range of sources of problems: electronic control unit (ECU), sensors, filters.

Before taking specific steps, analyze the style and manner of driving your car, brand of fuel, average speed, geographic and climatic operating conditions. It would seem like a small thing, but it can significantly increase the car’s appetite by several liters in the plus position. Drive the car into an inspection pit or overpass, let the engine cool, put on rubber gloves and begin visual diagnostics.

Pay attention to the fuel system, namely:

• Unscrew the nozzles one by one. Examine them. If you have a tester, clean it with injector fluid. Possible deposits or other foreign particles;
• Fuel pump: if there are no leaks or mechanical cracks, then the cause may be internal. You should disassemble it and clean the internal diaphragm (see the article “Signs of a fuel pump malfunction”);
• Remove and replace the gasoline filter with a new one; if there is no obvious sediment in the old one, this does not mean that it is clean. Microparticles are not visible to the human eye;
• Malfunctions in the speed sensor. At first glance, it has nothing to do with it; it may be a source of increased gasoline consumption;
• Instability in the operation of the phase sensor, which records the position of the crankshaft at certain moments of rotation;
• The oxygen sensor allows less air to pass through. The fuel system begins to starve, the mixture becomes leaner and the engine requires more ignition costs. In this case, only complete replacement, no resuscitation;
• In addition to the fuel system, we will check other components. Each part must be checked separately, so that you do not spend money on purchasing the entire set, but it turns out that the filter, for example, is to blame.
• The air filter is the second source after the fuel system. It can squeeze out a maximum of 3.0 liters/100 km. mileage

We recommend: The best ways to replace fine and coarse fuel filters on a VAZ 2109/2114/2115

Think about it, maybe it’s better to change it in time, especially since it costs a penny. And the replacement process is not complicated at all; even a schoolchild can do it without any special skills.

Spark plugs: after unscrewing them one by one, we carry out a visual inspection. An ideal candle will have a light brownish tint; all other colors are considered a malfunction. Red, black, soot, white soot are symptoms of instability in work. There are two options: either completely replacing the spark plugs or cleaning them with a household cleaner and checking the gaps between the electrode and the tip. Electrical integrity: This primarily applies to high pressure wires. Damaged ones can shoot onto the housing, thereby weakening the spark in the combustion chamber. Age and condition of the engine: perhaps the compression level is below normal or there is none at all. Check with a compression gauge and compare the data with the instructions; A simple reason is the tire pressure, which also needs to be checked with the operating instructions. As we see, there can be many reasons why the VAZ 2114 has high fuel consumption, but they can be eliminated both in a garage and in a car service center. Choose a method and go for it.

Reviews from VAZ Lada 2115 owners Power supply system

Considering that today the cost of gasoline is quite high, it is easy to guess that increased consumption can make a noticeable hole in the family budget of an ordinary person, when every trip becomes literally golden. Irregularities in the power supply and ignition systems most often cause a drop in power, so testing to identify the cause should begin with them.

VAZ 2131

This car is better known as Niva 2131. Initially, such cars, built on the basis of the Niva 2121, but with a longer body, were intended for export. But due to their good cross-country ability and relatively low price, they have gained popularity in the domestic market. Production of the VAZ 2131 started in 1993 and continued until 2016, when it was replaced by a newer version, the Lada 4×4 Urban. The VAZ 2131 was equipped with one of five gasoline engines or a diesel power unit.

The actual fuel consumption of VAZ models per 100 km may differ from the standard data specified in the tables, and it can only be determined experimentally

It is important to remember that average fuel consumption can differ significantly in winter and summer. If fuel consumption is much higher than the average values ​​​​given in the tables, the car must be taken to a service station with mechanics and, after determining all the factors of increased consumption, it may be worth converting it to gas

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• In summer, on the highway you will need 6.5 liters with a mileage of 100 km.
• The fuel consumption of the car in the urban cycle is 9.9 liters.
• With a mixed route, fuel consumption will correspond to 8.3 liters.
• In off-road conditions, VAZ 2115 gasoline consumption per 100 km increases to 10.8 liters.

1.5 engine with injector • To reduce warming up in winter, I bought a car blanket, now the car takes 8.5-9 liters per 100 kilometers.

What to do Sensor failure

• Arthur, Ufa. VAZ-2115 manufactured in 2012, the car is from the last batch. We bought it for testing at our editorial office. Everyone already knows about the car, the machine has been thoroughly studied. However, tag is a whole era, and we had to carry it out properly. For this purpose, they organized a resource test. The four-door car drove 100 thousand km and showed itself to be a great guy. Approximate fuel consumption is 9-11 liters with a 1.5 power unit. The checkpoint is still alive today and functions perfectly. As a result, a solid car for the chosen means, but still requires timely repairs.
• Julia, MSK. A car for any purpose, exemplary for both city roads and non-urban routes. At the same time, my fifteenth has high ground clearance, which makes it easy to use off-road. Brisk 1.5 l. The power unit consumes 11 l/100/100 km.
• Roman, Murmansk. I liked the car. In my opinion, it is much more profitable than Asian cars from the early years of production. In any case, our brand seems to behave more honestly and predictably. In addition, the service center has all consumables and parts. Fuel consumption 11 l/100.
• David, Astrakhan. My VAZ-2115 was purchased by my father, then it was inherited, so to speak. The car was manufactured in 2003, with a number on the odometer of 193 thousand km. Still running, still not complaining. Consumption 10-12 l.
• Renat, Mariupol. A worthy car of its time, a pure era for our AvtoVAZ. It's right that it was discontinued. Better late than not at all. And I gave mine away exactly in 2012, if it was removed. The car of my youth ate no more than 11 liters of the most budget AI-92.
• Evgeniy, MSK. A strong car, ordinary and easy to own. Very cheap in service, the layout of the car couldn’t be simpler. It's quite comfortable inside, if you don't pick too much. All controls are at hand. The 1.5-liter power unit is quite practical in city mode, consuming approximately 10 liters per hundred kilometers. 78 horsepower allows you to reach the first hundred in 15 seconds, and I feel this is acceptable for such money.
• Arkady, Nizhnekamsk. In the end I am satisfied with the car, this is my first car. I bought it in 2013; it was being discontinued at that time. It's called successful. Equipped with a 1.5-liter gasoline engine, front-wheel drive and manual transmission. Everything is the old fashioned way. Everything functions properly, I check the car periodically. Fuel consumption 11 l/100.
• Alexander, Tambov. A great car for a beginner, a very easy to learn car. Eats no less than 11 liters of gasoline. 1.5 liter 75l. With. The engine runs like 100hp. s.. Maybe it seems so due to vibrations and aerodynamic noise, but the engine is in fact quite playful for such a displacement.
• Renat, Lugansk. A normal car for the chosen means. I have a used one that has 100,000 miles on it, but so far everything is functioning properly. Fuel consumption with a 1.5 power unit is 11 l/100/100 km.
• Polina, Svetlogorsk. The car was manufactured in 2008. I praise the tag for its lively and dynamic power unit, which behaves like a fighter at all engine speeds. VAZ people know how to make engines. Consumption 10-11 l.

How to reduce fuel consumption on a VAZ 2115 • Reduce fuel consumption on a VAZ 2115 gasoline.

FACTORY SPECIFICATIONS

In any case, the fuel consumption of the VAZ 2114 per 100 km depends on the operating conditions of the vehicle. This indicator also affects the characteristics of the engine. It must be taken into account that the VAZ model was equipped with 4-cylinder engines:

• Volume 1.5 liters, 8 valves;
• Volume 1.6 liters, 8 valves;
• Volume 1.6 liters, 16 valves.

Table of gasoline consumption per 100 km. (according to data from the car manufacturer VAZ)

Therefore, the fuel consumption of a VAZ should differ slightly according to factory conditions in different modes, depending on the displacement of the engine and the number of valves in the cylinder head.

General table for all cars until 2008: : With 16 80 l engine with petrol manual transmission

Of course, no one forbids you to at least try to fix the problem yourself, and you should start by checking the functionality of the mass air flow sensor. Fast and passable, there have been no serious problems the entire time, at speeds above 120 km/h the consumption is about 8 liters, but in economy mode you can keep within 5 liters.

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• Idle speed sensor. Operating principle, signs of malfunction.
• Throttle position sensor (TPS) VAZ.

REAL PETROL CONSUMPTION ON VAZ MODELS

Real fuel consumption on the VAZ 2114 (as well as on the VAZ 2113 and 2115) often differs from the factory values. Mainly differs in the direction of increase. Of course, a lot depends on weather conditions. In winter, due to long and frequent warm-ups of the car, gasoline consumption increases, and other factors also influence fuel consumption:

• Driving style. Driving with sudden acceleration and high speed does not save fuel;
• Various malfunctions: in the engine, in the ignition system, in the fuel system, etc.;
• Unregulated tire pressure;
• Driving on a cold engine;
• Fuel quality.

The engine does not pull: the main reasons for the decrease in engine power

So, if no other symptoms other than loss of traction are detected, then you immediately need to pay attention to the quality of the fuel, the proper functioning of the ignition and power systems.

• As practice shows, more than half of the cases of reduced efficiency from internal combustion engines are associated with fuel. The engine does not turn on due to the fact that the tank may be filled with low-quality or unsuitable fuel for this type of engine (for example, 92-grade gasoline instead of 95-grade gasoline).

Typically, such manipulations are necessary when, parallel to the loss of traction, unstable operation of the internal combustion engine is noted, the speed jumps or floats at idle and under load, the engine does not start easily, the “check” light is on the panel, etc.

Also, owners of gasoline engines can independently determine the quality of gasoline by the spark plugs and their appearance. To check the spark plugs you need to unscrew them from the engine. A disruption in the combustion process of the fuel-air mixture in the cylinders, as well as the presence of impurities in the fuel, can be identified by soot on the spark plugs and its color.

For example, if the fuel contains a lot of third-party metal-containing additives and additives, then the skirt and electrodes may become covered with reddish soot (brick-colored). Black soot will indicate that the fuel is not burning properly, etc. In any case, malfunctions in the combustion process of the working mixture lead to the fact that the engine stops pulling.

• The next step in diagnosis is checking the spark plugs. A decrease in the efficiency of these elements is also accompanied by a decrease in the power of the power unit.

This is especially noticeable during sharp accelerations, and when the car is already moving at high speed. In other words, the motor has no “reserve” left for further acceleration.

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:

• the europanel device is a front panel with two LCD displays, equipped with an overboard thermometer;
• convenient placement of emergency information in the center of the panel;
• optimal interior ventilation;
• steering column adjustment;
• heated seats;
• electric windows;
• folding rear seats.

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.

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• Violations of the thermal clearance of valves;
• Heavy carbon deposits on the valve plates and seats, or their burning;
• Occurrence of rings;
• Limit wear of the CPG;
• Cylinder head gasket failure.

Car tuning

When talking about car tuning, you should take into account many of the subtleties that arise during such an interesting process. When tuning a VAZ-211440, the spare parts for which are not very expensive, you need to remember about the standards that require approval from competent persons. Before you start improving your car, you need to contact the traffic police, providing them with a statement stating the planned changes to the design of the car. This is a mandatory item, neglecting which can result in a hefty fine. Next, officials issue a permit containing conditions for the execution and procedure for issuing a document confirming the technical safety of the car. If global changes are planned, an assessment by specialists is required, as well as attached technical documentation.

Upon completion of the technical work, the owner of the car must provide another application, which must indicate all the changes made, their scale and quality. Then the owner of the car sends it for technical inspection, after which the data is recorded in the registration documents. As you can see, there is a lot of work.

Sensors and electronics that affect flow

If everyone knows the location of the wheels, then where the mass air flow sensor is located in the VAZ-2114, for example, not everyone knows. But this is not the only sensor on which flow directly depends . There are enough of them:

• throttle position sensor;
• idle air control;
• Lambda probe;
• idle speed sensor;
• speed sensor.

Throttle position sensor

Mass air flow sensor

Speed ​​sensor

Lambda probe

Idle speed control

And in general, all control electronics on VAZ fuel-injected cars are prone to tricks. Even such a not-so-subtle device as a gas pump can seriously affect consumption. On the VAZ-2114 it is electric, and most of the parts are made of plastic, which indicates a small resource.

When the pressure in the power system drops, the flow rate will increase very noticeably.

It’s easy to check its operation - there is a place on the fuel rail to connect a pressure gauge, the normal pressure is 370-400 kPa . But if you have these symptoms:

• instability at idle;
• drop in power at high speeds;
• high CO content in exhaust gases;
• the motor is unstable,

you should check the pump on the stand.