High fuel consumption VAZ 2114 (injector, 8 valves) – 14 reasons

Owning a domestic car means low costs for spare parts, consumables and fuel. Small engine volumes installed on the entire range of models allow serious savings on fuel. It is clear that a sudden increase in gas mileage becomes a problem, especially when using the car every day. In this article we will look at why the VAZ 2114 (injector, 8 valves) has high fuel consumption. There are several reasons for this problem, but most of them can be eliminated with your own hands.

Useful video:

Advice! In order to save money and not buy unnecessary spare parts, we recommend conducting computer diagnostics of the car. In most cases, there will be errors in the ECM that will tell you the direction in which to go to correct the problems.

What is the norm for a VAZ 2114?

The proper condition of all vehicle systems depends on regular maintenance. Timely replacement of filters and oil and the use of only high-quality fuel allows you to extend the uninterrupted operation of the main units.

On a working “four”, consumption with a volume of 1.5 liters should not exceed 6 liters when driving on the highway. In the city, the rate of burned fuel per 100 kilometers fluctuates around 9-10 liters. On average, a working car “eats” no more than 7.5 liters in mixed mode.

If you observe high fuel consumption on the VAZ 2114 only in the cold season, then you should understand that exceeding the specified data by 1.5-2 liters is the norm. If you observe a serious increase in the “gluttony” of the engine, carry out diagnostics of the car.

On versions with 16 valve engines, consumption remains approximately at the same level as on 8-valve engines. The most economical 126 engine installed on the 2114 consumes about 5 liters on the highway.

Exceeding the given consumption indicators means there is a malfunction in the ignition or fuel supply system. The condition of the motor itself also affects its “gluttony”. To reduce the performance to factory values, you should find out the reasons for the high fuel consumption on the VAZ 2114.

What to do to avoid high gas mileage

It is unlikely that fuel consumption is growing like an avalanche, sharply. If this happens, it means that the fuel line is somehow damaged, or the tank is completely leaking, which will be indicated by a characteristic smell in the cabin.

However, if the technical condition of the car is normal, and the consumption is still higher than the rated value, you should take a closer look at your driving style.

For example, aggressive driving in city mode, with frequent acceleration and braking, driving in third or fourth gear for long distances will inevitably lead to high consumption.

Shell line of motor oils.

In addition, even the viscosity of the oil that is poured into the engine matters . If the viscosity coefficient is too high, the engine spends extra energy to overcome it, and this adds 3-7% to the total fuel consumption.

Another fuel hog is the innocent air conditioner. Due to the fact that it can take away about 15-20% of the engine's power during operation, fuel consumption will also increase proportionally. Moreover, in this case, the driver may not notice changes in engine operation, although fuel consumption will increase. But the standard versions of the VAZ-2114 were not equipped with air conditioning.

Spark plug

Spark plugs are the most important element in the system for supplying sparks to the cylinders. Plugs are responsible for producing a spark that ignites the fuel-air mixture in the cylinders. Their wear or non-compliance with factory requirements leads to the problem of improper detonation.

Useful : Engine trouble on VAZ 2114 (11 reasons)

Spark plugs are a good indicator of problems with the combustion process. Black deposits on the spark plugs mean late ignition, while white deposits indicate a lean mixture. This element of the system should be changed regularly. Poor condition of high-voltage wires or a faulty ignition coil will reduce the life of the spark plugs. Their cost for model 2114 is small, so replacement should be done every 25-30 thousand kilometers.

Real, that is, practical indicators

As shown by numerous measurements of motorists, on average this car consumed from 7 to 8 liters per 100 km in the combined cycle. Vehicles from 2006–2013 took part in the testing. As is the case with many other domestic cars, the best results were demonstrated when driving at speeds from 70 to 90 km/h. At this speed, 14th consumes only 5 liters of gasoline. But a radically different situation develops in urban driving mode. Depending on the style the driver chooses, consumption can reach 13 or even 14 liters.

Each of the happy owners of this or another model strives to ensure that fuel consumption becomes as low as possible. This is not surprising, because the cost of gasoline is constantly rising, which leads to increased financial expenses. Fuel consumption in practice often differs from the indicators declared by the manufacturer. It is necessary not only to know the real indicators of your car, but also to be able to achieve a reduction in this indicator.

High voltage wires

Poor manufacturing quality of the factory wires that transmit the spark to the spark plugs leads to early wear. Having pierced the wires to the engine body or the complete absence of a spark along it is a signal to replace the armored wires. It is recommended to install silicone armored wires, because... they are resistant to temperature changes. Even if there is no visible damage to the wire, micro-breakdowns may be present. The presence of breakdowns can be determined in the dark. Look under the hood with the engine running and carefully examine each armored wire.

If there are breakdowns, increased fuel consumption on the VAZ 2114 will be ensured. Like spark plugs, if this component of the system malfunctions, it disrupts the process of ignition of the mixture. This will be indicated by a flashing check on the dashboard.

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.

Ignition module

The appearance of microcracks in the ignition module housing is a common occurrence. Poor quality plastic, which shrinks under the influence of temperatures, leads to the appearance of cracks. Insufficient spark power reaching the wires, and then to the spark plugs, leads to the problem of improper ignition of the mixture. In case of such a malfunction, the check also lights up.

You should not try to glue microcracks, because... they will appear again when exposed to temperature. Replace the ignition module and reset the errors. If there are breakdowns, check the condition of the wiring to the module and the condition of the chip.

A malfunction of the module not only causes high gas consumption, but also leads to “tweaking” of the engine, which can lead to rapid wear. Malfunctions in the spark supply system conceal a lot of problems: decreased dynamics, the appearance of lumbago, contamination of the combustion chamber of the mixture due to the lack of a spark, etc.

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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.

The most obvious

First, the owner needs to conduct a small technical inspection of his car. Not everyone knows that you can reduce the fuel consumption of cars by choosing the right tire size. This, as well as the quality of the tires, gives better rolling and, therefore, lower fuel consumption, because the narrower the tire, the less rolling resistance it has. This allows you to reduce consumption.

It is also necessary to check the tire pressure. Reduced pressure can increase fuel consumption per 100 km in a VAZ-2114 by 15%! Faulty CV joints and wheel bearings may be involved in increased gas mileage if they are poorly adjusted, greased or worn out.

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%.

Mass air flow sensor (MAF)

The most expensive sensor in the “four” is the mass air flow sensor. It is very sensitive to dirt and oil. Untimely replacement of the air filter and wear of the piston group lead to contamination of the mesh of the mass air flow sensor. A faulty sensor gives incorrect readings about the amount of air consumed and prevents the computer from forming the mixture normally. This increases fuel consumption. The check on the dashboard may not indicate a problem.

A malfunctioning mass air flow sensor is a serious problem. With this problem, there are failures in acceleration, engine shutdown after engaging neutral gear, and constant “floating” of revolutions. To correct the situation, you can clean the mass flow sensor housing and the mesh using chemicals. Before purchasing a new mass air flow sensor, confirm that the old one is faulty with a multimeter. The price of a new spare part is about 3 thousand rubles.

High fuel consumption. Injector. How to fight?

I can’t figure out what’s wrong, I filled up with 7 liters of fuel, drove 35 km and the fuel pump started making sounds as if there was no gasoline, I filled 3 liters from a canister, everything seemed fine. I drove again a short distance and again along the old route. I changed three filters, the air filter, on the gasoline pump itself, and which is located under the bottom, it didn’t help, they say the idle sensor, but my speed is normal, when cold it’s 1500, when it’s warm it’s 800. The injectors are the same norms since the engine doesn’t seem to be moving , I didn’t notice any leaks on the asphalt. Help me to understand?

Reactions: Telman99

Igorek

Young-green

Registration Nov 8, 2010 Messages 18 Address Yekatreniburg Auto VAZ 2114 1.5 2003

take it to diagnostics. They'll look at everything and tell you. although my consumption also increases in winter, but not by much.

TAZ Valit **** !

Registration Oct 6, 2010 Messages 790 Address Alt. Krai, Rubtsovsk Auto VAZ 21093i 2003; KiaSportage

I have 5 liters, if you drive clean then for 50-60 km, and if you warm up in the morning - 10 km - warm up - 10 km - warm up. that's all the garage.

Wgamer

Young-green

Registration Dec 8, 2010 Messages 15 Address Chelyabinsk Auto VAZ 21099i, 1500, 2004

Today I looked into the tank and was surprised that there were at least 3 liters in the tank. despite the fact that yesterday I filled up with 2 liters to get to the garage. It’s not a big deal if I removed some white basket from the pump and there’s still fuel in it. There is a suspicion that because of this the pump has nothing to pump.

Andry

Moderator

Moderator

Registration Dec 25, 2009 Messages 1,225 Address Ukraine, Belgorod - Dniester Auto VAZ - 21093 / 1.5 / 91 (German)

Today I looked into the tank and was surprised that there were at least 3 liters in the tank. despite the fact that yesterday I filled up with 2 liters to get to the garage. It’s not a big deal if I removed some white basket from the pump and there’s still fuel in it. There is a suspicion that because of this the pump has nothing to pump.

How did you look into the tank? through the salon or something. If there are at least 3 liters there, then perhaps the fuel pump grid is clogged at the bottom and it is not enough from there and that’s why

Wgamer

Young-green

Registration Dec 8, 2010 Messages 15 Address Chelyabinsk Auto VAZ 21099i, 1500, 2004 in short the final verdict, the idle speed sensor needs to be changed, it seems to me so

01eg86

Experienced

Registration May 24, 2010 Messages 1,027 Address Taganrog Auto VAZ 211340, 1.6 16V, 2008.

change the strainer on the fuel pump. The idle speed sensor has nothing to do with it at all - don’t touch it if the idle speed is kept steady. It was a waste of time to remove the white basket from the fuel pump - when turning, the fuel pump will more often catch air, and it will fail faster.

Young-green

Registration Oct 22, 2010 Messages 5 Age 34 Address Kurgan Auto VAZ 21093; 1.5; 2003

I'll tell you about my situation, maybe it will help someone. I had a consumption of 20 liters in the city per 100 km (auto carburetor, 1.6). The fault was with the carb and the ignition. I adjusted everything, even installed a different carb, it didn’t help. The engine runs flawlessly for me. In theory, with such a consumption, the engine will not work normally, so I decided to fill one and a half liters of gasoline, stuck the hose from the gas pump into it, drove off, and oh horror! I traveled two kilometers on one liter. I decided to try another option, plug a return hose into this one and a half truck, filled in half a liter of gasoline and drove six kilometers.

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.

CAUSES

In principle, owners of carburetor nines need to pay attention to the problems listed above, with the exception of the engine management system, it does not exist as such. carry out additional diagnostics of the car; regular maintenance is obviously necessary, but experienced car owners recommend adding additional checks every 2-3 months; first of all, check the fuel filter.

Air leak

A more serious and difficult to diagnose cause of increased consumption is air leaks. Damage to the corrugation to the mass air flow sensor housing, loosening of the fastenings of the pipes on the engine, damage to the manifold gasket - these are just a few sources of air leaks. There are many options for diagnosing and finding the exact location of the air leak. You can often determine the problem area by ear. In extreme cases, you can resort to using a smoke generator.

How to calculate gas consumption per 100 km?

Here is the formula for calculation:

1. number of liters of fuel you filled: how far you drove x 100 = fuel consumption in l / 100 km
2. 48.7 l: 517 km x 100 = 9.4 l / 100 km
3. 28.2 l: 300 km x 100 = 9.4 l / 100 km
4. Average fuel consumption x fuel price: 100 = cost per 1 kilometer
5. 9.4 l / 100 km x 40 rub. /

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Lambda probe

The oxygen sensor in 2114 is an unreliable element. Its malfunction affects the stability of the engine. When the lambda probe breaks down, the engine at idle starts to work with dips. Its malfunction is first indicated by a check on the dashboard. The built-in self-diagnostic function also allows you to determine the error code. Replacing the lambda probe is done by yourself. You can continue driving if it breaks down, but this will increase consumption.

Effect of sensors on flow – Gasoline pump and filter

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. DS is faulty.
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?

Fuel injectors

Proper operation of the fuel supply system is the key to obtaining full power from the engine. Lack of fuel leads to increased fuel consumption. Clogged or inoperative fuel injectors are a serious problem. Cleaning them is possible only after completely dismantling the fuel rail. They directly affect fuel consumption. Sudden changes in the direction of increasing the “gluttony” of the engine indicate possible contamination of the injectors. There are special stands for cleaning them. It is also worth checking the condition of the wiring and chips on the ramp. If one of the injectors is not working, it will lead to engine stalling and excessive fuel consumption.

Ways to reduce fuel costs

The most important rule is to diagnose your car on time, because fuel consumption largely depends on faults inside the car. In order to maintain normal gasoline consumption, you should follow these recommendations:

:

• periodically replace the air supply filter;
• periodically diagnose the functioning of the spark plugs;
• will help control gasoline consumption - keeping the VAZ engine compartment clean;
• give preference to trusted gas stations and high-quality gasoline;
• check the operation of the brake system.

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.

How much does a new sensor cost?

Of course, car parts are not cheap, but if necessary, they must be purchased in order for the vehicle to work properly. The sensor should be purchased only in specialized stores where there is a guarantee, and where you can actually get competent advice. This spare part costs around 350 rubles. As a rule, such options are very reliable and durable. It makes no sense to buy cheaper ones, since their characteristics are in no way inferior to those that cost 350. It’s not worth buying cheaper ones, because these are mostly Chinese parts that are short-lived and of poor quality. If you find it difficult to choose, then ask the seller which sensor is better to choose. Basically they are all similar, the only difference is the price. Please note that this part can also be purchased online. The main thing is not to be cheap, but also not to spend all your money on one spare part.

As we can see, any part of the machine becomes unusable over time, so it needs to be replaced. As for the idle speed sensor, this device also needs to be replaced from time to time for the accuracy of the indicators. Quite often, due to a faulty sensor, a car begins to have problems with the engine, the speed deteriorates, etc. With such problems, it is quite dangerous to drive a car, since there is no guarantee that the engine will work without “whims,” and on the road this is very dangerous . You shouldn’t risk your most valuable assets; it’s better to send the car in for repairs or fix it yourself. A car, like any other device, must be used carefully and repaired as needed, then it will serve for a long time and reliably.

Throttle Position Sensor (TPS)

The TPS is responsible for determining the angle at which the damper is rotated. The power consumption, engine power, and dynamic characteristics of the car depend on this. Correct mixture formation is also impossible without correct indications from the TPS. Symptoms of its malfunction are floating speed, dips and jerks during acceleration, and the appearance of a “check” on the dashboard.

Reasons for increased gasoline consumption and how to deal with it

There can be many reasons that cause an increase in car appetite, but take a look at the most common ones, which are presented in the list below:

1. Malfunctions or breakdowns of the fuel system. Most often, you should start by checking the condition of the fuel filter. If everything is in order with it, then the next step should be to check the condition of the injectors and fuel pump. Other elements worth paying attention to include the lambda probe or catalytic converter.

2. The problem may also be a malfunction of the electronic control unit, which is responsible for the fuel injection program, since the engine type of the VAZ 2114 is an injector. Problems of this kind cannot be solved on your own; they need to be left to experienced auto electricians and diagnosticians.
3. Another reason could be an overly clogged air filter element. In this case, it must be replaced.

4. There is a certain influence of spark plugs on fuel consumption. If you use spark plugs with the wrong heat rating, or with excessive carbon deposits, be prepared to have to refuel the fuel tank more often.

5. In winter, every car traditionally becomes more voracious. It's all about harsh climatic conditions, long warm-up times, as well as increased rolling resistance, including due to winter tires.
6. Another common reason is insufficient air pressure in the car tires. It is believed that this criterion can reduce fuel consumption by 5% immediately if the tires are properly inflated with air.

One of the easiest ways to reduce gasoline consumption by several percent is to use light motor oil, which has a low viscosity level.

Only if oil of such viscosity is allowed by the manufacturer.

In addition, any Lada consumes a lot of fuel during sudden starts. In this case, the high consumption is caused by the entry of significant volumes of fuel into the engine cylinders. High gears are also uneconomical when driving at low speeds. At idle, the engine consumes little fuel, but warming up the engine for too long is also ineffective in this case.

As you can see, the fuel consumption of your VAZ 2114 is influenced by a large number of factors. Many of them can be successfully combated to ensure that the car becomes more economical. On my blog there are also interesting materials regarding the fuel consumption of VAZ 2110, Ford Focus, VolksWagen Polo and many others. Therefore, we will be glad to see you among our regular readers. See you!

Source

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

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.

VAZ-2114 cars are popular in Russia. These are inexpensive and simple cars that are accessible to the middle class. However, practice shows that many car owners are concerned about fuel consumption per 100 km: the VAZ-2114 most often consumes fuel in an amount exceeding the declared consumption.