We independently eliminate the smell of gasoline in the interior of a VAZ 2107

Today we will talk about the main reasons why the smell of gasoline appears. VAZ 2107 (injector and carburetor) has a specific fuel tank ventilation system. It is for this reason that, as a rule, an unpleasant aroma appears. And it’s not a breakdown, but a design feature of this vehicle unit. In addition, a sharp burning smell may appear, which is alarming and makes the driver think that there is a problem with the car, and a very strong one at that. But let's look at all this in more detail.

Why the sensor may not show

Cases when the fuel level sensor does not work on a VAZ 2107 are not at all uncommon. Experienced owners of 7s know what can cause a device to break down. Moreover, sensor breakdowns occur equally often on both carburetor and injection VAZ 2107 models.

The fuel level sensor or FLS is a rheostat made of nichrome wire. The position of the moving contact is changed using a float. The device is located on both injection and carburetor models inside the tank. The only difference is that the injection sevens additionally have a fuel pump, which is located next to the sensor. If the fuel gauge does not work, then there is a high probability that there is a malfunction of the sensor in the tank.

Failures of this device manifest themselves in different ways:

1. The pointer indicator is constantly in the “0” position.
2. When the car moves, the needle tends to “jump,” which also indicates a malfunction in the fuel level control system.
3. When the ignition is turned on, the needle on the fuel level indicator is at zero, but when driving, after a while it begins to function.
4. The indicator (light) does not light up, indicating that the amount of fuel in the tank is reduced.

What causes the fuel quantity indicator in the tank on the seven to not work needs to be disassembled in detail, this will help you find out where to start repair work. The causes of breakdowns are:

• The sensor fuse has blown - this element must be checked first so that you do not have to do unnecessary work. If the fuse is blown, the dial indicator will always show “0”.
• The board tracks are worn out - this type of malfunction is directly related to the sensor on which the tracks are erased due to their wear-out. This type of breakdown is not considered serious, as it can be easily fixed. To do this, you need to bend the slider so that it moves along the section of the track that has not yet been erased.
• If the true fuel level in the tank is distorted, it is necessary to adjust the sensor regulator. To solve the problem, you will need to change the position of the FLS pins. Changing the position of the pin is done by moving it to the side until the pointer arrow moves to “1”. The arrow in positions “0” and “1” must be stationary, and if it moves when installed in these positions, then it is necessary to bend the pin accordingly.
• Oxidation of the FLS contacts, which also causes the indicator to become inoperable. To eliminate the breakdown, you will need to clean the contacts.
• The sensor float is damaged - depending on the fullness of the tank, the float moves the moving contact of the rheostat to the appropriate position. The float is a sealed volume of air. If the integrity of the float is compromised, fuel gets inside, which results in the display of incorrect data.

Only after it has been determined why the fuel indicator is not working can the appropriate repair actions begin. However, to identify a breakdown, you will need diagnostics, which every owner of a domestic car can carry out.

Checking the fuel level sensor

Before replacing the fuel level sensor on a VAZ 2107, it is recommended to first verify the causes of the breakdown. Further manipulations should be carried out according to the instructions:

1. You need to disconnect the pink wire from the sensor located inside the gas tank. In this case, the ignition must be turned on.
2. If the arrow previously displayed a full tank, and after disconnecting the wire, the arrow on the fuel level indicator dropped to “0,” then the sensor itself is faulty.
3. If the arrow displays a full tank when the wires are disconnected, this means that the indicator itself in the instrument panel is faulty.
4. To check the pointer, you will need to remove the instrument panel, find the wires that are connected to the device and disconnect the gray wire with a red stripe.
5. After disconnecting the wire, you need to turn on the ignition and observe the location of the indicator arrow. If the arrow deviates to zero, this means that the pointer is working properly, and the cause of the breakdown is a violation of the integrity of the wire.

REPAIR OF VAZ-2107 GAS TANK, FUEL SYSTEM, FILTER

The VAZ 2107 (classic) gas tank is protected from gasoline drainage!!!! Why is the fuel level sensor not working? Repair, disassembly, Toyota Haice 3L

Why does the car smell like gasoline?

So, let's start the discussion in order from the most common reasons to the less common. According to statistics, owners of VAZ-2107 cars, as well as VAZ-2110, VAZ-2114 and some other front-wheel drive VAZs, most often encounter the problem of smelling gasoline in the cabin. However, similar problems also occur with Daewoo Nexia, Chevrolet Niva, Daewoo Lanos, Ford Focus, as well as older models of Toyota, Opel, Renault and some other cars.

Leaky joints of the fuel level sensor

Leaky fuel system joints are a very common reason for a car smelling like gasoline. This is especially true for front-wheel drive VAZs. The fact is that under the back seat of these cars there is a junction point for the fuel cells. To perform the appropriate inspection, you need to lift the rear seat cushion and fold back the hatch to get to the mentioned elements. After this, tighten all threaded connections that relate to the fuel line.

If tightening the mentioned elements does not help, you can use ordinary soaked laundry soap . Its composition can prevent the spread of gasoline, as well as its smell. You can even lubricate cracks in gas tanks or other elements of the fuel system with soap, since the elements included in its composition reliably seal the joints. Thus, you can lubricate with soap all the connections of the fuel system under the hatch located under the rear seat of the car. Often, this procedure helps in cases where there is a strong smell of gasoline in the interior of a front-wheel drive VAZ car.

Crack between tank and neck

In most modern cars, the gas tank design consists of two parts - the tank itself and the neck welded to it. The weld is made in a factory setting, but over time (due to age and/or corrosion) it can delaminate, thereby causing a crack or a small pinhole leak. Because of this, gasoline will get onto the inner surface of the car body, and its smell will spread into the cabin. This defect especially often appears after refueling or when the tank is more than half full.

There are also models (although there are few of them) that have a rubber gasket between the neck and the tank itself. Over time, it can also crumble and leak fuel. The consequences of this will be similar - the smell of gasoline in the cabin.

To eliminate this problem, it is necessary to inspect the tank body, and also look for fuel leaks on the tank body, as well as on the elements of the machine body located underneath it. If a leak is detected, there are two options. The first is a complete replacement of the tank with a new one. The second is the use of the already mentioned softened laundry soap. With its help you can close the gap, and as practice shows, you can drive with such a tank for several more years. Which of these options to choose is up to the car owner to decide. However, replacing the tank will still be a more reliable option.

An interesting and quite popular reason (especially for domestic cars) that the smell of gasoline appears immediately after refueling is that the rubber tube connecting the neck of the gas tank to its body has become leaky . Or another similar option could be when the clamp connecting this tube and the gas tank does not hold well. During the refueling process, gasoline under pressure hits the rubber band and clamp, and some of the gasoline may end up on the surface of the tube or said connection.

Fuel pump manhole cover

This situation is relevant for injection engines. They have a cap attached to the fuel tank that holds the high pressure fuel pump and fuel level sensor, which are located inside the tank. Said cap is usually attached to the tank with screws and there is a sealing gasket underneath the cap. It is this that can become leaky over time and allow gasoline evaporation from the fuel tank to pass through. This is especially true if the fuel pump and/or fuel level sensor or fuel filter were recently repaired or replaced before the situation when the smell of gasoline appeared in the cabin (the cap is often unscrewed to clean the coarse fuel mesh). During reinstallation, the seal may have been broken.

Elimination of consequences consists in correct installation or replacement of the mentioned gasket. It also makes sense to use an oil-resistant sealant. Experts note that the gasket mentioned should be made of gasoline-resistant rubber. Otherwise it will swell. It is also noted that the smell of gasoline is especially noticeable after refueling if the gasket on the gas tank is leaking. Therefore, it makes sense to also check its geometric dimensions and general condition (whether it has shriveled or, conversely, swollen). If necessary, the gasket must be replaced.

Fuel pump

Most often, the carburetor fuel pump leaks gasoline (for example, on the popular VAZ-2107 cars). Usually the reasons for its failure are:

• wear of the fuel gasket;
• failure of the membrane (formation of a crack or hole in it);
• Incorrect installation of fuel line fittings (misalignment, insufficient tightening).

Repair of the fuel pump must be carried out in accordance with the reasons listed above. Automotive stores have repair kits for repairing the fuel pump. Changing the membrane or gasket is not difficult, and even a novice car enthusiast can handle this job. It also makes sense to check how the fittings are installed. In particular, are they warped and do they have sufficient tightening torque? It is also worth paying attention to the presence of gasoline leaks on their body.

Fuel filter

Relevant for carburetor cars in which the mentioned filter is located in the engine compartment. There are two possible options here - either the fuel filter is very clogged and emits a foul odor that is transmitted into the car interior, or it is not installed correctly. Moreover, this can be a filter of both coarse and fine cleaning. In the first case, the filter becomes clogged with various debris, which actually emits an unpleasant odor. In addition, this situation is very harmful to the fuel pump, which works with excessive load. In carburetor engines, the fuel filter is located in front of the carburetor, and in injection engines - under the bottom of the car. Remember that there is no point in cleaning the filter, and it must be replaced in accordance with the regulations for each specific machine model. In most cases, it is not allowed to drive with the filter installed for more than 30 thousand kilometers.

The VAZ 2107 dashboard does not light up: reasons

If the device on the seven stops activating, check the components.

1. Corresponding fuse. The insert often burns out due to moisture or power surges in the on-board network.
2. Next, the wiring is checked. Some pins may not fit well or touch adjacent terminals, causing shorts and shorts.

Tidy 2107 does not work

If, when you turn on the ignition when the car is cold, the car does not start and the shield does not respond, check the above points and additionally inspect the ignition switch cylinder. Usually in this place the contact burns out or the connections oxidize, which causes loss of ignition. Highlight the mass damage. Wires may oxidize, resulting in loss of contact.

2107: the tidy does not light up, the starter turns

When the shield goes out or the light is dim, check the operation of the external lamps and the illumination of the car interior. When everything is in order, remove the device and check the contact groups of the module.

How to convert a VAZ 2107 carburetor engine to an injection engine

Replacing the scenes on a VAZ 2110 on your own

Some owners of carburetor “classics” independently convert their cars to an injector. Naturally, such work requires a certain amount of experience in auto mechanics, and knowledge in the field of electrical engineering cannot be done here.

What will you need to buy

The kit for converting a carburetor fuel system to an injection system includes:

• electronic control unit;
• gas tank;
• cylinder head (new or used from VAZ 21214);
• receiver;
• ramp with nozzles;
• fuel pump assembly;
• fuel filter;
• fuel line with rubber hoses;
• throttle assembly;
• accelerator pedal with cable;
• air filter assembly with sleeves;
• front engine cover;
• crankshaft pulley;
• ignition module;
• sensors for mass air flow, damper position, detonation, coolant temperature, oxygen concentration, crankshaft position, detonation;
• high voltage wires;
• harnesses, cables, wires, terminals, thermal casings;
• brackets.

The cost of all these elements is about 30 thousand rubles. The electronic control unit alone costs approximately 5–7 thousand. But costs can be significantly reduced if you buy used parts rather than new ones.

Conversion stages

The entire engine tuning process can be divided into the following stages:

1. Removing all attachments: carburetor, air filter, intake and exhaust manifolds, distributor and ignition coil.
2. Removing wiring and fuel lines. To avoid confusion when laying new wires, it is better to remove the old ones. The same should be done with the fuel pipes.
3. Replacing the fuel tank.
4. Replacing the cylinder head. You can, of course, leave the old “head”, but in this case you will have to bore the inlet windows, as well as drill holes and tap them for the receiver mounting studs.
5. Replacing the front engine cover and crankshaft pulley. In place of the old cover, a new one is installed with a shimmer for the crankshaft position sensor. At this stage, the pulley also changes.
6. Installation of the electronic control unit, ignition module.
7. Laying a new fuel line with the installation of a return line, a fuel pump and a filter. The accelerator pedal and its cable are also replaced here.
8. Installation of ramp, receiver, air filter.
9. Installation of sensors.
10. Laying wiring, connecting sensors and checking the functionality of the system.

It’s up to you to decide whether it’s worth spending time and money on conversion, but it’s probably much easier to buy a new injection engine, which costs about 60 thousand rubles. All that remains is to install it on your car, replace the gas tank and lay the fuel line.

Despite the fact that the design of an engine with an injection power system is much more complicated than a carburetor, it is very repairable. If you have at least a little experience and the necessary tools, you can easily restore its functionality without the involvement of specialists.

Diagnosing problems on cars - what to pay attention to?

Diagnosis of a malfunction consists of checking the condition of all components that were discussed above and replacing faulty elements.

In this case, everything begins with a visual inspection, after which it is worth moving on to checking individual components - the fuel filter, carburetor, injector and others.

It is also worth considering that cars with a carburetor and an injector have their own nuances of searching for damage:

Carburetor cars VAZ 2101-2105/2106/2107.

As mentioned above, the weak point of the “classic” is the carburetor, the operation of which is based on a mechanical principle.

To avoid problems, it is recommended to periodically check the device for serviceability.

In case of unprofessional adjustment, fuel overflows from the top, and its vapor enters the vehicle interior.

In injection cars, the problem of overflow is eliminated.

Diagnosing the problem is easy. When the engine is idling, the carburetor is dry and clearly performs its functions. But as soon as you add gas, fuel flows out from under the membrane.

The reason is broken threads or poorly tightened bolts. There are situations when the carburetor leaks the intake pipe to which the supply hose is attached.

Also, on the “classic” there are often problems with the fuel pump, from under the membranes of which fuel leaks. To eliminate the problem, it is worth tightening all the bolts.

Injection cars.

This category includes the currently popular Lanos, VAZ-2107, 2108, 2109, Niva (21213) and other models (including 2110, 21099).

In such cars, there may be a problem with the injector nozzle, which breaks off if there is a defect or improper use.

Problems often arise in the fuel line - in the area from the tank to the engine. For this reason, the first thing to start with is to inspect the fuel line. Once a leak is discovered, it should be repaired immediately.

How does the device work?

Replacing the fuel level sensor on a VAZ 2113, VAZ 2114, VAZ 2115 To understand the problem yourself, you need to understand how the fuel level is measured and information is transmitted to the instrument indicator. The circuit implemented in most vehicles includes the following main elements:

• a float made of lightweight polymer is immersed in the gas tank and is often combined with the pump block;
• gasoline sensor – lever-type potentiometer (otherwise known as rheostat);
• pointer arrow with scale;
• connecting wires.

In many modern cars, an electronic control unit is connected to the system.

The classic rheostat is an open coil of high resistance wire. A lever equipped with a contact and attached to the float rises or falls with the level of fuel in the tank, and the contact moves along the turns of the winding. The classic scheme works simply:

1. The rheostat and the pointer device are connected in series in the circuit, both are powered from the vehicle's on-board network.
2. When moving the float with the lever, the resistance of the potentiometer changes.
3. A change in resistance causes an increase or decrease in the current in the circuit, to which the indicator arrow reacts. The scale is graduated according to the resistance values ​​corresponding to the filling of the gas tank.

The updated version of the system works with the participation of a controller. The fuel level arrow receives a processed digital signal from the electronic unit that supplies power to the potentiometer. The principle of operation does not change, but the circuit allows you to obtain more accurate readings.

Design features of the fuel tank and the possibility of modification

The technical documentation for this car states that it holds only 39 liters of fuel. However, car enthusiasts have proven experimentally that when filling “under the neck” you can pour in up to 45 liters. Such fuel tanks were installed on the entire VAZ family, starting with model 2101. Standard 40 liters of fuel are enough for 451 kilometers. To prevent refueling from taking longer, modifications to the “seven” were in vogue in the nineties of the last century. Many people installed an additional gasoline tank in these cars, which eliminated the need to carry cans with them. Due to the design features of the main tank, the additional tank was placed in the trunk of the car. In some cases, he filled the entire space of this compartment. On the one hand, this is convenient for moving long distances, but on the other hand, another problem arises - it becomes difficult to transport goods.

In addition, due to this modification, the cabin may smell strongly of gasoline, which is unpleasant and can cause poisoning from fuel vapors.

The smell of gasoline in the car interior - possible consequences

Cars VAZ-2101-2105, VAZ-2106 and VAZ-2107 are morally and technically becoming obsolete, which allows us to safely classify them as “classics”. And, despite knowledge of the design and maintenance experience, the problem with the smell of gasoline in the interior of such cars is becoming more and more common.

Injection models are also not left out, the fuel system of which is also far from ideal.

Before considering the reasons for the smell of gasoline, we will analyze the likely risks and consequences of such a malfunction.

There are several of them:

• Increased fuel consumption . Often the appearance of odor is associated with a leak in one of the elements of the fuel system. As a result, most of the gasoline will remain on the asphalt or elements of the car body.
• Risk of fire . The main danger of fuel is its tendency to ignite. A small spark is enough for the gasoline vapor to ignite along with the car. There is no need to remind you about the consequences once again.
• Harm to the body . Gasoline vapors, despite their pleasant aroma, are dangerous to the respiratory system and the body as a whole. Prolonged inhalation of fuel vapors leads to dizziness, nausea and even loss of consciousness. In addition, long-term exposure to vapors may result in poor health and even death.

That is why, when the first smell of gasoline appears, you should act without delay, regardless of the make of the car - be it Lanos, VAZ-2107, Niva and other cars.

Is the range shown on the car's on-board computer accurate?

Many car owners often rely on the vehicle's on-board computer, which shows you the possible range. Therefore, some drivers bring the car to a low fuel level, relying on the on-board computer indicator, believing that the indicated range is true.

Also, many drivers, when a warning about low fuel level appears, immediately look at the on-board computer readings in order to find out how much longer the car can travel on the fuel remaining in the tank (power reserve).

But unfortunately, the range isn't accurate because it's only based on the average of your past driving on the road.

The fact is that the car’s electronics will not be able to show you the true range, since it cannot take into account in real time your current driving conditions that affect the consumption of gasoline or diesel fuel.

For example, if you were driving on the highway before a light appeared on the dashboard warning you about the low fuel level in the car tank, and now you are stuck in a traffic jam, then the range displayed on the on-board computer is actually incorrect, since this indicator is calculated using driving on the highway, where fuel consumption is actually much less than in heavy traffic in the city.

So don't expect to be able to drive very far when there is a low fuel warning.

Types of protective caps on the gas tank for VAZ 2101-2107

Plastic caps with a key are the basic and simplest protection against gasoline drainage. According to statistics, on average, an experienced attacker needs less than 1 minute to open this security accessory. Its cost is not high, but so is the degree of protection.

Aluminum cover with a code - this protective accessory is convenient because to open it the car owner does not need to constantly carry an additional key with him, and these covers are stronger in physical properties than plastic ones. However, attackers have found a way to break this protection in 2-5 minutes. In addition, there is a large number of defective lids, which is due to many fakes. The metal is very soft, brittle and can crack with little physical impact. The cost of this cover with a code is 50-100% higher than the plastic one.

Electric fuel pump with fuel level indicator sensor

Electric fuel pump with fuel level indicator sensor

Repair and operation manual - Features of injection vehicles - Electric fuel pump with a fuel level indicator sensor Electric fuel pump with a fuel level indicator sensor VAZ-2104, VAZ 2105, VAZ 2107 Removing an electric fuel pump with a fuel level indicator sensor from a VAZ-2104, VAZ 2105, VAZ 2107 car

1. Relieve the pressure in the engine power supply system of the VAZ-2104, VAZ 2105, VAZ 2107.

2. Disconnect the wire from the negative terminal of the battery on the car.

3. Disconnect the wiring block and hoses from the electric fuel pump tubes and, having disconnected the fastening clamp, move the upper part of the fuel tank to the left.

4. Using a 7 mm wrench, unscrew the eight nuts securing the fuel pump to the fuel tank around the perimeter of the flange.

5. Raise the electric fuel pump and tilt the electric fuel pump, remove the fuel level indicator sensor float from the hole.

The connection between the fuel tank and the electric fuel pump is sealed with a gasket.

6. To remove the receiving mesh filter, carefully pry it off with two screwdrivers.

7. Remove the filter from the tip of the electric fuel pump.

8. Wash the filter in acetone or a similar solvent, clean it with a hard brush and blow it with compressed air.

9. To replace the fuel level indicator sensor on a VAZ-2104, VAZ 2105, VAZ 2107 car, use a screwdriver to release the locking block of the sensor and electric fuel pump wires. Disconnect the block.

10. Using a slotted screwdriver, press the wire clamp and remove the clamp.

11. Mark the position of the wires in the block so as not to confuse them during assembly. Using an awl, we squeeze out the wire ends of the fuel level indicator sensor and disconnect them from the block.

12. Using a slotted screwdriver, unscrew the screw securing the “mass” wire of the electric fuel pump and the lower fastening of the fuel level indicator sensor, as well as the screw of the upper fastening of the fuel level indicator sensor.

13. Use wire cutters or side cutters to cut the wire clamp.

14. Remove the fuel level indicator sensor.

15. To replace the electric fuel pump on a VAZ-2104, VAZ 2105, VAZ 2107 car, remove the filter from the fuel pump and disconnect the wire block.

16. Use a slotted screwdriver to pry off the electric fuel pump clamps.

17. Move the electric fuel pump from the bracket.

18. Use two slotted screwdrivers to pry up the latch and remove the electric fuel pump from the groove in the holder.

19. Using an industrial hairdryer or hot water, heat the plastic tube of the fuel pump to a temperature of 70-90 °C.

20. Remove the tube from the fuel pump pipe.

Installation of an electric fuel pump with a fuel level indicator sensor on a VAZ-2104, VAZ 2105, VAZ 2107 car

Installation of all removed parts on a VAZ car is carried out in the reverse order.

Quote

Why else might there be a gasoline smell?

And the last thing that was not discussed in the article, we will now discuss. VAZ 2107 cars have not been produced by industry for quite some time, so, of course, all its elements are gradually becoming obsolete and deteriorating. This is especially true for rubber parts - oil seals, gaskets, tubes. Just think about how often you replace rubber brake pipes? Now think about how often you replace gas pipeline tubes? But they work in a no less aggressive environment, and on top of that, they also work under pressure.

Of course, this pressure in the fuel supply system is not comparable to that in the brake system pipes. But it will still be enough to cause leaks through microcracks. These micros soon become maxi. Therefore, carefully inspect the entire fuel line for leaks - under the hood, under the bottom of the VAZ 2107.

It is quite possible that there is a leak in the pipes that are located under the hood. Then air is taken in and there is a smell of gasoline in the cabin. And remember that if you start to smell fuel, you need to look for the cause in the entire fuel line. Please note that if your car is equipped with an LPG system, it must be serviced promptly, since when the tubes wear out, a leak will occur and the smell of gas will be felt in the cabin.

1200 rub. for the photo report

We pay for photo reports on car repairs. Earnings from 10,000 rubles/month.

Write:

The smell of gasoline in the cabin is not only a source of inconvenience, but also a real threat to the health of the driver and passengers. After all, these fumes can cause irreversible consequences in the body. Therefore, if a situation arises where the cabin smells of gasoline, it is necessary to begin identifying the breakdown and correcting it as soon as possible.

As a rule, the reasons for the smell of gasoline in the cabin are incomplete sealing of the gas tank cap, a leak (even a minor one) in the gas tank, leakage of gasoline in the fuel line, at the junctions of its individual elements, damage to the fuel pump, problems with the catalyst and some others. You can identify the problem yourself, but be sure to follow fire safety rules!

Car alarm with feedback

How to catch an attacker in the act and protect the car from draining gasoline, three conditions are necessary:

1. the car must have a car alarm with feedback installed;
2. additional alarm functions will be required;
3. after the alarm signal, it will be possible to get to the car in a short time (up to 5 minutes).

Most cars on the modern car market are already equipped with an additional option upon sale - a car alarm with feedback. This is a rather convenient security system that has the necessary functionality, compared to ordinary squealers, which only harm those around you.

Imagine that the whole yard is filled with many different cars, but which emit the same sound signals, for various reasons, depending on what they are tuned to:

• strong wind,
• the dog hit
• a car passed nearby, etc.

Who can say with a high degree of confidence that it was the alarm on his car that went off? So car owners have to jump up at every squeak of the “alarm” in the yard and peer intensely through the window to see if the lights on their car are flashing.

Against this background, feedback signaling is much more convenient. The only drawback when installing it on a classic is the lack of protection against gasoline drainage. The gas tank hatch does not have a factory lock on the classic, that is, access to the neck is practically open - remove the cap, insert the hose and drain the gasoline.

The installation of special lids with locks on the neck has already been discussed above. This is not at all effective in protecting against gasoline leakage. There are car owners who have lost up to five covers of different designs. Moreover, during such break-ins, not only the paint near the neck suffers, but also dents remain on the wing.

Fuel level sensor of VAZ 2107 does not work

Replacing the fuel level sensor on a VAZ 2101-VAZ 2107

Welcome! Fuel level sensor. it performs only one important function in a car and that is this sensor detects how much petrol is left in the gas tank and then sends a signal to the fuel level indicator located on the dashboard and thus you will know how much petrol is left in the gas tank.

The note! To replace the fuel sensor, you will need to stock up on a basic set of wrenches, which will have a 7 wrench and a 10 wrench, and you will also need to take your screwdriver with you!

Summary:

Where is the fuel pressure gauge located? It is located on one part inside the gas tank and the other is taken out and attached to the gas tank nuts. After unscrewing the nuts that secure it, as well as after disconnecting all the wires, clamps and hoses, the sensor can be removed from the hole in which it is located, but more on it a little lower.

For more information on the location of the sensor, see the photo below. As you can tell from the photo on it, this sensor is removed (the sensor is indicated by a red arrow) and the photo shows the same hole where the fuel sensor part is inserted.

When should I change my fuel pressure gauge? If the float wears out or if the sensor itself is destroyed, the following situations may occur with the fuel level indicator located on the panel:

Firstly, the pointer will not move when the tank is full, and its arrow will only rest on the o.

Secondly, when driving or simply when the engine is running, incorrect instructions can be given to the indicator due to wear on the sensor, for example, the tank is filled with gasoline upwards, and the indicator indicator moves or is at the middle sign or almost at the "min" sign.

Fuel level sensor. What's inside, why is it lying?

How to find the right video. about it here Support the project! MAP.

The note! Not in all cases, it is only the fuel level sensor; it happens that the operation of the indicator is disrupted by it, since it does not work, or it may even be in the wiring going from the sensor to the indicator! (If you are not sure if the sensor has failed, see the article "Checking sensors to work on a VAZ" and this article will have detailed instructions on how to check whether the fuel sensor is working or not)

How to replace the fuel level sensor, the same DUT, on a VAZ 2101-VAZ 2107?

Conclusion: 1) Firstly, remove the fuel tank from the car, otherwise the sensor cannot be removed as it will stick to the rear fender of the car when it is removed. (For information on how to remove the fuel tank, see the article: “Replacing the gas tank on a VAZ”)

2) Then remove the six nuts (several nuts have already been removed in the photo, but one nut is not visible) that secure the fuel sensor flange, and then pull out the sensor, thereby removing it from the car.

3) After this, notice where the sensor flange is secured with nuts, but after removing the sensor, the gasket was holding the sensor flange gasket to the pins, which also needed to be removed. The note! If this pad flexes a lot, it shows cracks or anything else, then in that case replace the gasket with a new one!

The note! If this pad flexes a lot, it shows cracks or anything else, then in that case replace the gasket with a new one!

Installation: 1) The new sensor and the gas tank itself are installed in the reverse order of removal, that is, first the sensor is installed in the gas tank, and then the gas tank itself is installed in its place.

The note! All six nuts that secure the sensor flange are carefully twisted and crossed, and with sharp and rough movements, the flange gasket can be damaged, and as a result, the gasoline in the tank will later leak through the gasket!

Tip: Before you buy a new sensor on your car, pay special attention to the markings that are on that sensor, so buy the new sensor with the exact same markings as the old one!

Additional video: For another way to replace the fuel level sensor, see the video clip just below:

The note! This video clip describes all the nuances associated with fuel-injected cars of the “classic” family!

Preventive measures

To prevent the smell of gasoline from appearing in the cabin, it is worth undergoing maintenance in a timely manner and checking the car components for proper functioning. The sooner the problem is found and fixed, the lower the risk of serious damage or accidental fire of the car.

In addition, it is worth inspecting the area where the car is parked for the appearance of fuel stains.

If there is a clear smell of fuel in the cabin, then first you should check the covers, mats and other elements. Perhaps the fuel simply got inside and was not caused by some technical malfunction.

This problem should be eliminated immediately, because any spark causes ignition.

If there are no sources of odor inside the cabin, it is worth checking the quality of the hose connections (especially at the point of connection to the fuel pump). It is worth remembering that the cause of the smell is not necessarily a serious breakdown.

Most often, the culprit is the adsorber and its poor quality work.

Before troubleshooting, you should carefully study the location of the fuel pipes in the car.

After eliminating the cause, you should get rid of the smell of gasoline in the cabin using one of the following methods:

• Weathering . This is one of the most effective ways. If it happens in the summer, then it’s enough to open the car doors and let the annoying aroma come out. It is allowed to use a fan as an assistant, which increases the efficiency of weathering. In winter and autumn, it is worth turning on the stove and opening the doors one by one, letting out warm air.
• Absorption (absorption) of gasoline vapors . Activated carbon, baking soda, ground coffee and others are considered effective assistants in this matter. All that is required is to place one of the above compositions in the salon, leaving it for several days. As soon as the smell disappears, the absorbent composition can be removed. When working with caustic soda, you should wear gloves to prevent skin burns.
• Removal using liquid products . If the source of the odor is spilled fuel, the easiest way to clean it up is with a rag soaked in hydrogen peroxide or a special cleaner.
• Visiting a car wash . If you don’t have time to deal with the problem yourself, then you should take the car to a car wash, where professionals will carry out a complete dry cleaning and eliminate the smell. Many services even carry out ozonation of the air.

Replacement of gas tank and major repairs

Regardless of what type of fuel injection is used on your vehicle, the process for removing the tank will be the same. First drain all fuel from it. Next, carry out the following work:

1. Remove the plastic casing from the container. To do this, you will need to unscrew several screws using a Phillips screwdriver.
2. Disconnect the wires from the contacts leading to the fuel sensor.
3. Use pliers to pry off the fuel hose.
4. Unscrew the bolt of the tension plate that secures the gas tank.
5. Remove the cap from the neck and carefully remove the tank.

Assess its condition. If there are several leaks or they are too large, then it will be easier to replace the entire fuel container. To do this, simply take a new tank and reassemble it in the reverse order.

If you do not have the opportunity to buy a new container, then stock up on:

• fiberglass;
• epoxy resin;
• acetone;
• sanding paper.

First, dry the tank thoroughly; if you start repairs immediately after dismantling, you will be disappointed with the result. Next, proceed to repair work:

1. Cut the fiberglass into pieces so that they completely cover the leaks or holes.
2. Impregnate the material with epoxy resin.
3. Lay the fiberglass cloth over the leak area and level it so that there are no bubbles on the surface. Remove excess resin. The first layer is the most important, so take your time.
4. Dry the patches, then putty them and paint them with primer.

Troubleshooting

If the pointer needle does not move at all, then the first step is to make sure that the wiring is intact. You can ring electrical wires with a multimeter or tester. You should also check the quality of fastening of the terminals to the output contacts of the FLS. If there is scale in such places, they should be cleaned with sandpaper or any other low-abrasive material.

If the wiring is in order, but the indication does not work, then most likely only replacing the fuel level sensor will solve the problem. If it is necessary to carry out this operation on a VAZ 2107 carburetor, then the work is performed in the following sequence:

1. Disconnect the negative terminal of the battery.
2. Remove the trunk trim.
3. Disconnect the wires and hoses from the FLS.
4. Unscrew the FLS mounting nuts.
5. Remove the sensor with the float from the gas tank.
6. Install the new part in reverse order.

On a VAZ 2107 injector, replacing the sensor will be complicated by the need to disconnect the fuel hoses from the fuel pump, which is also installed in close proximity to the fuel tank.

In most cases, a failed fuel level sensor cannot be repaired. The additives included in high-octane gasoline are quite aggressive substances and after a certain period of operation, the current-carrying parts of the FLS that come into contact with the fuel and its vapors can be completely corroded.

The root cause of the smell of gasoline

This problem is familiar to many owners of not only VAZ 2107 cars, but also other classics. As a rule, long searches for a solution lead to nothing, and it’s simply impossible to figure out what’s what on your own. And the car interior still smells like gasoline. Why does this happen and is it possible to somehow get rid of it? It’s possible, but you’ll have to spend a little money and devote some time to solving the problem.

The fuel tank ventilation system is to blame. It is because of this that the interior of the VAZ 2107 smells of gasoline. And it doesn’t matter whether you have an injector or a carburetor in your fuel system. The principle of operation of gas tank ventilation is completely the same on all modifications. But why does it smell like gasoline? Everything is quite banal. The fact is that the thin tube that should go out into the atmosphere most likely has a poor seal, or its edge is completely located in the luggage compartment.

So, you need to improve the standard ventilation system a little to get the best result. To do this, connect all the elements according to the diagram given in this article. But please make sure that the following conditions are met:

1. All pipes must be designed for use specifically in the fuel system.
2. Connections must be made using clamps. It is forbidden to use any sealants, as they are simply corroded by gasoline! And you will get not only a persistent smell of gasoline in the interior of the VAZ 2107, but also specific clogging of the fuel system and injectors! And this is fraught with expensive repairs.
3. The tube that goes under the tank hatch must be securely fastened. Moreover, you need to make sure that the space between the hatch cover and the trunk is perfectly sealed. This is one of the most important conditions for preventing the unpleasant smell of gasoline from entering the interior of the VAZ 2107.