Why does the fuel consumption of the VAZ 2114 increase?

Fuel consumption is a serious issue for the vast majority of motorists. First of all, it is relevant for owners of budget cars, which include the VAZ-2114. 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.

According to the manufacturer’s documentation, the “fourteenth” consumes from 8 to 9 liters of fuel per 100 kilometers. Of course, a lot depends on the driving style - with an aggressive driving style, fuel consumption increases. In addition, there will also be different numbers on the highway and in the city. However, there is a guideline, so it is not difficult to draw a conclusion about whether the fuel consumption of the VAZ-2114 is normal or too high. Naturally, if a car consumes too much gasoline, the problem should be corrected as soon as possible.

Fuel consumption certificate

It is worth considering that there is a passport and actual fuel consumption of the VAZ Lada 2114. Quite often these two parameters do not coincide. If you believe the manufacturer, then this car with a 1.5-liter power plant in the combined cycle should consume 6.8 liters of gasoline per 100 kilometers. At the same time, consumption on the highway is 5.2 liters, in the city – 8.9 liters.

Fuel consumption per 100 km (VAZ-2114 with a 1.6-liter engine) will be 7.2/5.4/9.8 liters in mixed mode, on the highway and in the city, respectively. As you can see, the numbers are very attractive, which indicates the efficiency of the car.

However, if you believe the reviews, then on the VAZ-2114 the fuel consumption per 100 km significantly exceeds that declared by the manufacturer. With a 1.5-liter engine, the maximum gasoline consumption when driving in urban conditions is 12 liters. With a 1.6-liter engine, consumption reaches 13.5 liters per 100 kilometers. As for driving on the highway, here the parameter practically corresponds to the declared one - 5.5-6 liters per 100 kilometers. In mixed mode, the car consumes about 7.5-8 liters per hundred.

Some owners have significantly higher fuel consumption, but often there are some malfunctions with the engine or some element of the fuel system.

The indicator “lies”, works intermittently... Signs of breakdown

Which sensor is responsible for the temperature in the VAZ 2114? The coolant temperature affects how almost all engine control systems will work; this data is taken into account when adjusting the ignition angle, the moment the spark is supplied for fuel combustion in the cylinders, the time the fan is turned on for forced cooling of the power unit, and much more. It is installed in such a way that the arrow shown on the cover is directed in the opposite direction of the vehicle’s movement, and the fixing part fits into a special groove on the opening of the fuel tank.

• Stop the engine and turn off the ignition.
• Disconnect the terminals from the battery.
• Wait a few seconds and connect the terminals back to the battery.

Increased consumption in idle mode • the same manipulation should be carried out on the other side of the fuel purifier;

Simple reasons that you can eliminate yourself

Sometimes you can solve the problem of the huge fuel consumption of the VAZ-2114 yourself. First of all, you need to check the degree of contamination of the fuel filter and check it for debris. If there is debris inside it or suspicion of contamination, then it is better to replace it. This element is inexpensive, and its average price is 300 rubles. You can replace it yourself - it’s simple and does not require the intervention of a specialist.

The second filter is the air filter. Air passes through it, which is subsequently mixed with gasoline and supplied to the combustion chamber. And if it is dirty, it will not be able to pass enough air. As a result, the air-fuel mixture will not be enriched with oxygen, and a lean fuel mixture will quite logically lead to increased gasoline consumption. Car owners often manage to reduce gasoline consumption by approximately 3 liters per 100 kilometers simply by replacing the air filter. It is easy to change - it is located in a large black box under the hood.

Clogged air filter

A negligent attitude towards the condition of the machine leads to the accumulation of a number of faults. The cost of an air filter for a VAZ is no more than 200 rubles. However, this does not stop some drivers from wanting to save money. A clogged air filter is a direct path to damage to the mass air flow sensor and loss of power. Obstructed air supply to the combustion chamber of the mixture increases fuel consumption.

In winter, this element does not play a big role, but when driving in dusty conditions, its condition should be checked regularly. The best way to eliminate a problem with this element is to carry out maintenance on time.

Lambda probe

One of the first and most important sensors, the operation of which can affect increased gasoline consumption, is the lambda probe. It is located on the exhaust pipe, and its main task is to assess the condition of the exhaust gases. Based on the oxygen content in the exhaust, the system regulates the volume of the working mixture. Accordingly, if the sensor malfunctions, the system will not be able to accurately regulate the working mixture that needs to be supplied to the combustion chambers. This may increase consumption.

However, if the sensor breaks down, the system warns the driver about this with a “Check” light on the dashboard. You can also see the error using the on-board computer. Often this sensor breaks down due to poor quality gasoline, oil getting into the combustion chamber, or valve clamping.

Low compression in the engine

Gradual wear of the piston group and the engine as a whole is inevitable even with constant maintenance. Insufficient compression in the cylinders is a sign of wear. In such a situation, the engine stops producing maximum power, which increases fuel costs. In addition, oil consumption in the engine appears. Repairing the piston group is a logical option to solve the problem. To begin with, you can decarbonize the rings and fill in the additive. This will have a small effect, but will still reduce the level of gasoline consumed.

In the photo, the engine compression indicator is 13 points, which is a good indicator.

Speed ​​sensor

Also, the cause of high fuel consumption per 100 km (VAZ-2114) may be the speed sensor. Its main task is to transmit information about the speed of the vehicle to the control unit. The latter monitors the operation of the engine by adjusting the throttle valve. The problem with this sensor will be shown by the on-board computer or error reading device. It is almost impossible to replace it yourself without specialized knowledge. Typical symptoms of speed sensor failure:

1. Speedometer failure or interruptions.
2. “Floating” idle speed.
3. Noticeable loss of traction.
4. Stopping the engine when idling.
5. Increased gasoline consumption.

Idle air control (IAC)

Maintaining idle speed is the main function of the IAC. The regulator periodically fails. This is reflected in the smoothness of gear shifting, maintaining warm-up speeds and gasoline consumption. The cost of the regulator is 200-300 rubles. Changes in minutes.

As you can see, there are many reasons for the increase in the “appetite” of the VAZ 2114 car. Timely diagnostics, replacement of all filter elements and a calm driving style will reduce the likelihood of breakdowns.

Increased consumption in idle mode

Typically, normal gasoline consumption when the engine is idling is 0.8-1 liter per hour. If these indicators are not exceeded, it means that everything is fine with the system. If consumption is increased, then it is worth checking the same sensors. However, special attention should be paid to the idle speed sensor, which automatically regulates idle speed. It is located on the throttle assembly and is secured with a pair of screws. The device does not have an electronic system, so its breakdown will not be displayed on the dashboard in the form of a “check”. You can judge its malfunction only by certain signs:

1. Lack of high speed when starting a cold engine.
2. The engine stalls when idling. This may even occur during gear changes.
3. “Floating” idle speed.

Symptoms of DDM malfunction: Knock sensor

To quickly and accurately identify vehicle malfunction problems, you need to know all the signs of sensor malfunctions to identify the culprit of the problem. By the way, often when buying a used car you can hear from the seller that the fuel pump screen was recently cleaned or the fuel pump was replaced, after which the fuel level sensor stopped working, etc.

Error code	Flash combination	Decoding
12	Long-pause-two short	Diagnostic circuit malfunction
14	Long-pause-four short	Engine temperature sensor malfunction
15	Long-pause-five short	Likewise
16	Long-pause-six short	Abnormally high mains voltage
17	Long-pause-seven short	Abnormally low mains voltage
19	Long-pause-nine short	Crankshaft position sensor failure
21	Two long, pause, one short	Incorrect data from the throttle position sensor
22	Two long, pause, two short	Likewise
24	Two long, pause, four short	Problem with the speed sensor
27	Two long, pause, seven short	Lambda probe failure
28	Two long, pause, eight short	Likewise
33	Three long, pause, three short	Air flow meter needs to be checked
34	Three long, pause, four short	Likewise
35	Three long, pause, five short	Idle speed outside the tolerance range
43	Four long, pause, three short	No signal from knock sensor
51	Five long, pause, one short	Memory error in block
52	Five long, pause, two short	Error in controller
53	Five long, pause, three short	Memory error in block
61	Six long-pause-one short	No signal from the immobilizer

How to reduce gasoline consumption on a VAZ-2114 car?

The steps are simple: you need to use high-quality gasoline, replace consumables on time (fuel and air filters, oil, oil filter), monitor the condition of the sensors, and if you suspect a malfunction, you need to contact a specialist.

Now you know what fuel consumption per 100 km the VAZ2114 has, and what elements can affect increased gasoline consumption.

High fuel consumption of the VAZ 2114 today is one of the most common problems faced by owners of domestic cars. The fuel consumption rate of the machine can be found in the technical documentation.

For the injection “fourteenth” engine, the consumption rate is within 8.5 liters per 100 km in the urban cycle and about 6.5-7 liters on the highway. But more often, VAZ 2114 owners record completely different indicators that go far beyond its limits. What is the most common problem and are there effective ways to fix it? Sometimes we are faced with the acute question of how to reduce fuel consumption on a VAZ 2114 8-valve injector?

Signs of IAC malfunction:

Assembling the parts is carried out in the reverse order; it is recommended to replace all ring-shaped seals when installing a new filter. If gasoline drops are visible on the new part, they should be carefully removed with a clean rag. Otherwise, the service life of the updated element can be shortened.

What you need to know about the fuel level sensor

1. In the first year of the car's service, it does not raise any questions or complaints and copes with its tasks perfectly.
2. Over time, the device still fails. This is due to imperfect design, fragile housing, exposure to moisture, condensation, and temperature changes.
3. If the seal of the housing is broken, the contacts interact with condensate, oxidation and loss of functionality occur.
4. A competent solution to the problem is periodic prevention.
5. For this, the sensor is removed, cleaned, and the contacts are changed. In some situations, a complete replacement of the fuel level sensor on a VAZ 2114 is required.
6. When replacing, it is important to remember the markings.

The fuel level sensor serves to calculate the amount of fuel in the tank and provide the corresponding information to the driver through the instrument panel. Sensor components:

• Resistor;
• Float and lever;
• Open-on sliding contact (turns on and off the warning lamp on the instrument panel).

Its operation is carried out due to the movement of the float when the amount of fuel changes. The resistance of a variable resistor changes, causing the resistance in the circuit to change as well. Due to this, the resistances are displayed on the panel. As practice shows, the BM 150 sensor is installed on the VAZ 2114.

What is the real gasoline consumption of VA3 2114?

Today it is a real rarity when a car fully complies with the specifications of the technical documentation. Most often, the manufacturer indicates data obtained during testing of the car under ideal conditions. The actual fuel consumption of almost all modern cars is 1-2 liters higher than the norm. You should not neglect important factors that contribute to increasing the “appetite” of the machine.

These factors are:

1. Vehicle operating conditions.
2. Driving manner and style.
3. The presence of various types of malfunctions.
4. Fuel quality.

High fuel consumption VAZ 2114 injector 8 valves, how much is this in numbers? Most owners of the 8-valve “fourteenth” note consumption in the range of 8.5 – 9 liters in the urban cycle and 7-7.5 liters per 100 km on the highway. This is an average figure that is close to the fuel consumption rate specified by the manufacturer.

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

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The main signs and reasons for the increase in fuel consumption of the VAZ 2114

If it’s summer and you drive on normal roads, but at the same time you notice an abnormal “appetite” of the fuel-injected 8-valve VAZ 2114, then it’s time to conduct a full diagnosis of the car’s condition. Excessive fuel consumption is easy to notice not only by the frequency of visits to gas stations. Often, owners note some oddities in the operation of the engine. Unstable operation of the “heart” of the car is accompanied by black smoke from the exhaust pipe and the presence of popping noises in the muffler or intake manifold.

Black smoke from the exhaust pipe most often occurs due to the formation of an overly rich fuel mixture. This disease occurs due to clogged injectors, faults in the ECU, and low-quality spark plugs.

Gasoline consumption can increase, both for a simple and harmless reason, and in the event of serious malfunctions in the car system. For example, a clogged fuel filter increases the fuel consumption of the “fourteenth” by as much as 2-3 liters. Low tire pressure and non-standard wheel radius also contribute. It has long been a known fact that the larger the radius of the wheel, the more effort must be made to turn it.

Throttle position controller

Problems associated with this unit are expressed by the following symptoms:

• XX speed is increased;
• incorrect ignition timing;
• unstable operation of the internal combustion engine at idle;
• unbalanced composition of the air-fuel mixture;
• jerks when changing gears or difficult shifting (on cars with automatic transmission).

In addition to a violation of the XX mode, a malfunction of the Throttle Posicion Sensor (TPS) controller will not allow the car to accelerate effectively; the electronic system will incorrectly calculate the required load for the engine.

Even those who know which sensors most often affect fuel consumption are not always aware that the TPS controller on their car is involved in the operation of the automatic transmission. And from this we can conclude that an irrational choice of gear will lead to loss of power and excessive fuel consumption.

At the slightest suspicion of a TPS malfunction, you need to check two basic things:

• whether contacts XX (IDL) are opened;
• the state of the variable resistor for a break.

You can check the functionality of the sensor using a multimeter by connecting it to the IDL contacts and manually moving the throttle valve. A normally functioning TPS will immediately display a voltage of up to 12 V on the device scale.

Ways to reduce fuel consumption of a VAZ 2114 with an injector

What to do if the VAZ 2114 has high fuel consumption and the reasons are unknown? Of course, it is best to go to a service station and undergo a full computer diagnostic. The fact is that the VAZ 2114 injection system with 8 valves contains a large number of different sensors. A failure in the operation of one of them can lead to the fact that the owner of the car will rack his brains for a long time in search of faults, but will never find them without special software.

One of the most effective ways to reduce gasoline consumption by a car and its subsequent control is timely prevention of vehicle components and components and scheduled maintenance.

Not every faulty sensor affects the “appetite” of the car. The lambda probe plays the greatest role in the excessive consumption of the fuel-air mixture. This device regulates the formation of a combustible mixture based on the volume of oxygen in the exhaust. The presence of errors in the operation of the lambda probe can be determined by the on-board computer. This device most often fails due to poor fuel quality and an incorrectly set advance angle.

The car owner can independently eliminate or partially reduce the high fuel consumption of a VAZ 2114 injector with an 8-valve engine through the following measures:

1. Regularly replace the air and fuel filter. In this case, preference should be given to factory elements.
2. Monitor the condition of the spark plugs and replace them according to the recommendations.
3. Periodically measure the tire pressure level and monitor the condition of the brake system parts.
4. Refuel your car only at time-tested gas stations.
5. Maintain cleanliness of components and assemblies of the engine compartment.

Coolant temperature controller

Some motorists may be surprised by the message that this device is responsible not only for monitoring the condition of the coolant, but also for the efficiency of the engine. The principle of its operation is simple - the resistance changing depending on the temperature serves as a reason for the ECU to increase or decrease the supply of the combustible mixture.

For example, the engine has not yet warmed up and the resistance produced by the device is at the level of 500 Ohms. The on-board computer analyzes the reading accordingly and increases the pulses going to the injectors - more combustible mixture enters the cylinders.

Before finding out what other sensors may influence increased fuel consumption, it is worth checking the resistance of the coolant controller at fixed temperatures and comparing the readings with the table ones. On average, a “cold” engine will produce 2-6 kOhms, while a “hot” one will produce 250-350 Ohms.

Useful video

You can learn more about the possibilities of reducing fuel consumption by watching the video below:

Maintaining the proper condition of the car in the future will save the owner from hassle and unexpected expenses. You just need to promptly replace clogged filters and damaged spark plugs, and then increased fuel consumption will bypass your car.

How to reduce fuel consumption on a VAZ 2114 is a question many car enthusiasts ask. What the gasoline consumption of a VAZ 2114 should be is usually indicated in the factory documentation. It ranges from eight to nine liters per hundred kilometers. This spread depends on the driving style and its mode (city, highway, mixed). If the indicators of your iron “favorite” fit into these frameworks, then most likely no intervention will reduce them. But if your VAZ 2114 has high fuel consumption, then this is already a reason to carry out diagnostics and most likely repair the systems of your car.

If you yourself do not have sufficient knowledge or skills, then it is better for you to contact specialized workshops where they will accurately answer the question: why the fuel consumption on the VAZ 2114 has increased.

Here we will talk about possible causes and methods for eliminating them.

Reasons for high fuel consumption on the VAZ 2114

Incoming air condition controllers

vozduchan This factor is controlled by two devices. The MAP sensor provides measurement of the volume of incoming air. The principle of its operation is simple - the more air enters when the damper is open, the more fuel is supplied to create the optimal mixture (14.7: 1). The signal generated at the controller output, depending on its design, can be either analog or frequency.

The MAF sensor determines the amount of air entering the cylinders. The device is structurally made of a thermistor and a platinum filament, the temperature of which is maintained at the same level. The incoming air cools the filament, which requires a change in the amount of current passing through it to compensate for the temperature difference. The ECU simultaneously determines this compensation and generates a signal at the controller output corresponding to the required air flow.

You can determine which of these sensors affect increased fuel consumption and at the same time their serviceability using any car scanner. Most cars have a self-diagnosis function, but you shouldn’t think that its possibilities are limitless, so experts advise using a scanner and testing the parameters of not only the controllers, but also the data of the injection system.

Next, we will find out which sensors affect fuel consumption.

The lambda probe assesses the state of the exhaust (the presence of oxygen in the exhaust gases). That is, based on the volume of oxygen in the exhaust, it provides adjustment of the working mixture. It is installed in the exhaust system, it should be noted that it is the only one located on the “pipe” so you can’t go wrong. An oxygen sensor error can be seen either using the on-board computer or when undergoing diagnostics at a service station. Here are some reasons for his “death”:

• Poor quality gasoline;
• Stiff valves;
• Incorrect mixture;
• Oil scraper rings allow oil to flow into the mixture;
• The advance angle is incorrectly set.

Device malfunctions and diagnostics

This method is suitable for modern flow meters. To check it, you need to turn on the multimeter and set it to measure DC current. The limit on the device should be set to 2 Volts. The MAF has the following pinout:

The main culprits of overspending

If fuel consumption increases sharply, the first thing to do is check the filter. Debris in the fuel or air filter can significantly increase gasoline consumption. What can we say if even low tire pressure leads to the same result. But the main reason for the “gluttony” is the sensor. He is not the only one in the VAZ 2114 device, so let’s dwell on this point in more detail. Increased consumption may be caused by a malfunction of the following devices.

• Lambda probe - installed in the exhaust system, it regulates the working mixture. Most often, the device fails due to low quality gasoline, incorrect mixture, pinched valves, broken oil rings, and an incorrectly set advance angle.
• Speed ​​sensor - if traction has dropped, idle speed is floating, the speedometer is unstable, and fuel consumption is high, then it is most likely to blame. You can find it on the top cover of the gearbox.
• Phase sensor – we discussed all the nuances of this device in the previous article.
• Electric fuel pump - the symptoms are still the same. You can accurately determine whether there is a problem with it using a pressure gauge.
• Injectors - failures during acceleration, low engine dynamics symbolize their clogging.

In addition, if consumption has increased, the following nuances may also be to blame:

1. Low engine compression;
2. Broken ignition;
3. High voltage cable rupture;
4. Faulty spark plugs;
5. Unregulated gas distribution system.

Most self-taught mechanics cannot understand why, after replacing a sensor, the on-board computer continues to give an error. I have already talked about how to reset its readings many times; to do this, simply disconnect the battery terminals for a few minutes.

This is roughly what the main points that can change the standard fuel consumption look like. Watch what kind of gasoline you fill up, and also be prepared for increased consumption in winter. And that’s all for me, follow the development of the blog and leave reviews! Not a nail or a rod!

If you find an error, please select a piece of text and press Ctrl+Enter.

Increased consumption in idle mode

Does the VAZ 2114 have higher fuel consumption at idle? Sensors monitor everything here too! Normal consumption, with the electrical load completely turned off, is 0.8-1 liter per hour. If this indicator is greatly exceeded on your car, then we check the sensors described below.

Idle speed sensor (ISR). Its purpose is to automatically adjust idle speed. It is located on the throttle assembly, or rather secured with a pair of screws on its cover. This sensor does not have an electronic diagnostic system and therefore its condition can only be judged by these signs:

• When starting a cold engine, high speeds are not observed;
• The engine stalls at idle;
• Idle speed “floats”;
• When you turn off the speed while driving, the gearbox stalls.

Idle speed regulator VAZ 2114

TPDZ. A device for precise dosing of the mixture or, more simply, a throttle valve location sensor. By its name you understand that its function is to “show” to the controller what position the throttle valve is currently in. It is part of the throttle assembly and is attached to its body. The malfunctions of this device are very similar to the symptoms of DXX, but it is connected to an electronic diagnostic system and if it breaks down, the “check” light will notify you about it.

In addition to all the above reasons, there are some more: insufficient compression in the engine, incorrectly set ignition timing, the gas distribution system is not adjusted, defective spark plugs, breakdown of high-voltage wires. These reasons can also negatively affect the average fuel consumption of the VAZ 2114.

If you feel the strength to eliminate them, then go ahead! If you have doubts about this, it is better to contact a specialized service center, this will help to avoid unnecessary costs.

Reason two - what to do?

Now let's move on to the secrets of the VAZ 2114 fuel system. Signs of its malfunction, in addition to increased fuel consumption, can be: decreased power, the engine stalls at idle, and the percentage of harmful impurities in the exhaust gases is exceeded.
All these problems, coupled with quite decent results from testing electrical equipment, give reason, first of all, to measure the pressure in the fuel system. To do this, you need a pressure gauge with a range of at least 7 atmospheres. No more is needed, because where the measurement range is larger, there is a greater probability of error at low pressure. Wrap plumbing linen around the pressure gauge nozzle and place it on a hose with a diameter of 9 mm. All this is tightened with a clamp and the homemade device is ready. It will be more expensive to buy the same ready-made one, and diagnostics at the service will cost at least 300 rubles. It’s better to do some work yourself. So, measure pressure in four modes:

• with the ignition on (not lower than 3 atm);
• at idle speed (2.5 atm);
• by removing the tube from the fuel pressure regulator (3.3 atm);
• with a pinched drain tube (7 atm).

If the specified indicators are met, there is nothing to worry about.
If the fuel pump suddenly takes a long time to build up pressure, check to see if the fuel filter is clogged. Perhaps it has been in need of replacement for a long time and it is because of it that the fuel consumption of the VAZ 2114 exceeds the permissible limits. Sources

• tuningkod.ru/chip-tuning/ekonomiya-topliva/bolshoj-rashod-topliva-vaz-2114-uvelichilsja.html
• remontvazov.com/bolshoy-rashod-topliva-vaz-2114
• autovaz-2114.ru/fuel-system/pochemu-uvelichivaetsya-rasxod-topliva-u-avtomobilya-vaz-2114/

SIGNS How to adjust the carburetor

I bring to your attention the opinion of one of the masters regarding the Oxygen Sensor and its diagnostics. Recently, with the advent of special literature on the principles of operation of electronic fuel injection systems, some auto repairmen and car service dealers, who cannot be called otherwise, have found an additional source of income for themselves. which is called Diagnosis of increased fuel consumption on your car. When over-gassing, the rich mixture at the sensor terminals should have a voltage of more than 0.7 Volts; when the idle mixture is lean, you can artificially create a suction into the intake manifold, the voltage drops to 0.2 Volts.

Air resistance

Aerodynamics is a serious matter. This may not be obvious to car owners, but the air resistance coefficient of the VAZ-2114 is much higher compared to the VAZ-2109. “Nine” has Cx equal to 0.463, and “fourteenth” has Cx = 0.445! Of course, when compared with modern cars, this is, frankly speaking, not a fountain. But for the “seven” it is 0.55. The “ten” has the best aerodynamics among the VAZ line: 0.33–0.35.

Any plastic body kit can worsen aerodynamics. For example, a hood deflector increases resistance by 3%. Window deflectors can increase it by another 1.2%.