One of the most important elements is the electric fuel pump, which is located in the car's fuel tank. The fuel pump pumped fuel to the system from, creating a certain pressure.
Car repair professionals allocate the following common problems of the fuel system that are associated with the fuel pump:
- basic pumps badly and does not create the right pressure;
- baszonasos does not pump when the ignition is turned on;
Taking into account the fact that the fuel pump is an electromechanical device, the most popular faults of the fuel pump are associated with both mechanical and electrical parts. Next, we will look at what signs indicate the breakdown of the fuel pump and why it ceases to swing the fuel pump partially or completely.
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Signs of focus of fuel pumps
The main symptoms of the failure of the fuel pump, as well as failures in its work are:
- the car starts with difficulty, the engine works unstable, there are failures, jerks when pressed on the gas pedal, etc.;
- the pump does not pump after turning on the ignition, and does not pump the fuel pump, the engine does not start;
There are also cases when the fuel pump ceases to swing right in motion. The engine in a similar situation begins to work with failures and stalls immediately after the remains of gasoline in the fuel line are spent. The problem may occur both regularly and periodically.
Not shakes fuel pump: causes and diagnostics
Let's start with the fact that if the benzobak is filled, charged, dry and there is a spark, the starter turns the engine normally, but it does not occur, then does not occur at the same time, then pay attention to the fuel pump. A frequent problem is that there is no power on the fuel pump after the ignition is turned on. A similar fault is also manifested in motion when the power supply to the fuel pump and the motor suddenly stalls.
No less important point is how much gas station shakes. In other words, the pump can buzz and buzz (food is served), but do not create the desired pressure in the fuel line. The pressure in the fuel system with the working fuel pump must be more than 3 bar (which depends on the specific car model). The specified pressure is accumulated in the fuel ramp and has an indicator from 300 kPa and higher.
To check, it is necessary to measure the pressure gauge pressure in the fuel rail, taking into account the indicators that are the norm for a particular car model. Using the example of injection vases, the pressure at the inclusion of ignition 3 of the atmosphere, at idle the index is 2.5 atmospheres, while pressing 2.5- 3 atmospheric gas. This method will help accurately determine:
- fault of the fuel pressure regulator in the ramp;
- breakdown of a gas station or a noticeable reduction in its performance due to wear;
- strong filter contamination (fuel filter and / or gas station mesh);
In the second case, when pressed for gas, the pressure does not grow, in the latter case, the pressure gauge arrow rises, but very slowly or jerks.
Reducing the pressure indicator below the norm will lead to the fact that the motor may not start or start hard, told, twitch, work unstable and with failures. If this happens through the wine of the pump, and not the fuel filter, then the likelihood that the mesh of coarse purification of the fuel pump was hampered. In this case, there is no need, as it will be enough to replace or even clean the mesh.
If there is a suspicion that there is no voltage on the fuel pump, there is a way to quickly check. It is enough to turn the ignition key and listen, because at the moment of turning the key must be heard the light hum of fuel pump. If this buzz does not hear, it means that there is no power to the fuel pump, there are problems with wiring, etc.
We add that this method of determining the operation of the pump for sound is not suitable for all cars. On some models (especially the premium class), noise insulation is at a high level and the fuel pump is included immediately after opening the driver's door, and not during the turn of the key in the lock. In this case, it may seem that the gas station does not work when the ignition is turned on, while
The sound of the pump work is simply not to hear.
Also in the overall list of possible reasons why the fuel pump does not have:
- failure of the fuse of the gas station;
- breakdown of the gas station relay;
- problems with the "mass" of the benzonasos;
- malfunction of the electric motor of the fuel pump;
- oxidation or contact hall and gas station terminals;
- focused fuel pump itself;
Wiring to gas station
Most cars, the wiring on the fuel pump is three wires: "plus", "minus", as well as the wire for reading the amount of fuel in the gas tank. If the fuel pump does not pump, then the cause may be no power.
To check power on the fuel pump, it is enough to take a 12 volt light bulb, feeding me up with an external fuel pump connector. After the ignition turn, the test lamp should light up. If this does not happen, it means that the problem is in external circuits. Lamps lighting will indicate the need to check the internal contacts of the fuel pump.
To test the external wiring, it is necessary to connect positive and negative contacts, which are removed from the fuel pump power connector, to the mass of the pump. Contacts You also need to connect to the gas station relay. If you place the negative contact for the mass, after which the ignition is turned on and the light lights up, then this means that this contact is faulty. In the event that the lighting of the bulb did not happen, then the problems with the "plus" are obvious. If you place contact on the relay and the light bulb lights up, there was probably damage to the wire on the segment that connects the relay and the fuel pump itself.
Electric motor Benzonasosa
If the pressure test in the fuel rail and external wiring on the fuel pump gives positive results, then the gas station motor should be checked. The specified electric motor is responsible for circulation of gasoline inside the fuel pump.
During the inspection, it should be borne in mind that the terminals on the fuel pumps themselves have an oxidic property, as a result of which the power is not supplied and the pump does not pump. In this case, the motor worker, but the terminals must be cleaned or turned.
To believe the gas station motor, you will need to fix the wireless lamp wires on the cleaned and good terminal of the electric motor, after which the ignition should be turned on. The lighting of the bulb will indicate that the gas station motor does not work.
Contact of the mass of the fuel pump
On problems with the mass of the gas station may indicate the fuel level sensor that works incorrectly. Mass can be poorly fixed, the fuel pump in this case does not pump fuel. The mass wire is usually under the dashboard and goes through the cabin. It is necessary to find the specified wire, check and clean all contacts, then securely secure the mass on the fuel pump.
The gas station relay is often attached next to the mass of the fuel pump, that is, under the dashboard. A normally working relay after turning on the ignition in a couple of seconds allows the pump to create pressure in the system and immediately turns off.
At the time of rotation of the ignition key, the driver hears the characteristic click (the relay turned on), then the similar click will indicate to shut down the gas station relay. If no such clicks are heard, it indicates a malfunction of the relay or its contacts. The optimal solution will replace the fuel pump relay to a new or obviously suitable device. We add that the cost of spare parts is quite affordable.
Fuse Benzonasosa
During diagnostics, it is necessary to check the fuse of the gas station. The specified fuse at 15 and is usually located in the fuse block in the boilerspace and has a Fuel Pump marking, which is translated and means the fuel pump.
The fuse of the fuel pump must be pulled out and inspect its contact. Contact integrity will say that the device is normal. Damaged contact will indicate that the fuse of the fuel pump burned. In this case, you need to put a new fuse, which has a very low cost (as in the situation with the fuel pump relay).
Other reasons for fuels of fuel pump
Frequently, a non-professional installation of additional electrical equipment or security anti-theft systems leads to the fact that the power supply to the fuel pump disappears due to the rebound contacts or other connection errors.
Also should not be excluded and the possibility that in the car alarm or security complex there was a failure, after which the power supply of the fuel pump occurs. In other words, .
Finally, add that the fuel pump in the gas tank is immersed in gasoline, which is actively cooled. The habit of riding with an empty tank can quickly remove the fuel pump electromotor, as its burning occurs.
Read also
What functions performs a gas station relay, signs of breakage. Where the fuel pump relay is installed, how to properly check the fuel pump relay.
In itself, gasoline (diesel fuel) from the car's tank in the engine will not be able to get, for this you need a patching mechanism - the fuel pump. And if he fails, the consequences of predictable is easy - the car will rise. Possible reasons for this can be a lot, and since they are typical of almost any brand of the car, then talk about them better on some specific example. Suppose that the VAZ-2110 fuel pump does not work.
Types of fuel pumps
The serial production of the "Dozen" began in 1995, that is, at that time, when domestic cars were still equipped with carburetor systems. In them, fuel pumps (pumps) of a mechanical type were installed for pumping fuel. There is such a pump directly from the car engine.
For good operation, the carburetor does not require high pressure, therefore the pump has a relatively simple design similar to water pumping systems. It is installed directly under the hood of the car, which, of course, makes it easier for its maintenance or replacement.
With the advent of injectors, the design of the fuel pump was modified, it became electric. The principle of his work has changed. If the mechanical pump requires that the starter starts to rotate the crankshaft, then the fuel pump is first powered in the injection system, which, with the built-in electric motor, creates the required pressure in the highway, and only after that the engine starts.
This type of fuel pump is installed directly into the tank with flammable.
Thus, there are two types of fuel pump: mechanical and electric.
Gas station does not work: signs of breakage
Regardless of the design of the engine, if the fuel pump fails, the symptoms of its breakage for both species are manifested the same, and they appear as follows:
- If the ignition candles are good, the spark is good, the engine twists, but there are no flashes in the cylinders.
- In engine cylinders, individual flashes occur, but the motor will not start.
- The motor will start, but at the same time "float" turns.
- The engine starts, idling corresponds to the norm, but when you try to increase them or the beginning of the movement, the motor stalls.
- During the movement, the car twisters, when trying to raise the turnover, there are failures in the operation of the motor, the dynamics of the car decreases (not pulling).
It is worth noting that similar symptoms may also appear with other damage, for example, with a highly polluted filter of fine purification, faulty DMRV (air flow sensor) or slaughtered nozzles. Therefore, it is impossible to unambiguously to blame for such symptoms.
In injection vehicles, when the ignition is turned on from under the rear seat, the buzzing is distributed, it turns on the electric motor, pumping fuel if there is no sound, it means that the fuel pump does not work.
Mechanical fuel pump refused: what are the causes?
The reasons why the VAZ-2110 fuel pump does not work, there may be several:
Electric fuel pump does not work, possible causes of breakage
In the injection engine, the fuel pump runs from the car's side power grid, so its failure is not always connected with the breakdown of the smoking mechanism. The cause of the fault may also be: the fuse, relay or oxidation, the burning of contacts on the wires feeding the electric motor.
Another common reason why the vase injector fuel pump does not work, can be a strainer installed at its input. Despite the fact that it is intended for the initial, rough fuel purification, its grid has a rather dense structure. And since the pump is in the tank, it practically concerns his bottom and accumulating the sediment there, which pollutes it.
Well, the worst is a breakdown of a motor who is responsible for circulating gasoline inside the pump or failure of the elements of its design.
Methods of checking gas station
Find out whether or not there is a mechanical fuel pump, it is very simple, to do this, it is enough to disconnect the end of the hose that connects the pump with a carburetor, and by lowering it into an empty bottle, press several times on the manual swap lever located on the pump. From the hose, with a pulsating jet to flow gasoline. This will determine, idle or no internal elements of the pump.
To understand why the fuel pump does not work on the injection engine, you must first "ring" its electrical panel. The check is better to start from the end point, that is, from the pump itself. The control lamp is connected to his terminals, and if with a turn of the key in the ignition lock, it lights up, it means that everything is in order, the breakdown should be sought in the pump itself, if not, then in the fuse, relay either in the wiring.
To check the fuel pump itself, you need to know what it creates pressure in the fuel ramp:
- At idle, its value should be within 0.23-0.25 kPa.
- During the motor start - 0.3 kPa.
- When you click on the accelerator - 0.28-0.3 kPa.
- When the reverse tube is retrieved, returning gasoline in the tank, the pressure should rise to 0.4 kPa.
If in some of the mode, the pressure does not correspond to the norm, therefore, the fuel pump does not work as it should - its elements are strongly worn and require repair or replacement.
Trouble-shooting
To fix the mechanical fuel pump, it will be necessary to purchase Repair Kit, which includes aperture and valves - these parts can be changed independently. There will also be no special work and replacing the pusher with the spring. If the breakdown is more serious, then the meaning in resuscitation disapves, it will be cheaper and easier to put a new fuel pump.
Electric fuel pump has an unintended body, and trying to repair it without certain skills, it is better not to trust such work to be entrusted to specialists. The only thing you can do on your own is to replace the grid of the inner filter of rough cleaning. But here you need to know that the grids are different, so you will have to remove the filter from the tank to get a sample.
Warning breakdown Benzonasos
To extend the gas station resource, you need:
- Monitor the quality of fuel filled into the car.
- To completely eliminate even the likelihood of entering the water tank.
- During the planned, it is necessary to change fuel filters.
- In the case of mechanical damage to the fuel tank, it is necessary to dismantle the fuel pump and check its condition.
- Periodically purify the fuel tank from the possible accumulation of the sediment consisting of the smallest solid particles, which are contained in gasoline.
The performance of these simple rules will benefit not only on the fuel system, but also on the engine itself.
Automotive fuel pump is a device designed for uninterrupted fuel supply to the installation, in which the fuel mixture is forming. Even the slightest malfunction leads to interruptions in the engine, and with more serious problems you simply do not start it.
In this article, we will consider situations where the fuel pump does not pump fuel at all, or shakes, but not in the amount that the power unit is necessary for normal operation. We will also try to understand the possible causes of one or another malfunction of the fuel supply device and discuss the methods of their independent elimination on the example of automobiles of domestic production of carburetor VAZ-2109 and injector VAZ-2114.
What are the fuel pumps
Cars with gasoline engines, depending on the brand, model and modifications, can be equipped with various gas station in design. But all of them are divided into two main categories: mechanical and electric. Most are equipped with mechanical fuel supply devices. If you take (carburetor), then from the factory it was completed by DAAZ. The main difference of this device is the simplicity of the design, to understand which even a newcomer is easy. In the carburetor "nine", the fuel pump is located in the motor compartment of the car. It is easy to find out on a characteristic hemispherical hat and fuel pipe hoses.
Engines injector VAZ 2114 are equipped with electric fuel pumps. The basis of their design is also the membrane, but unlike "mechanics", fuel supply devices in cars with automatic fuel injection, are not under the hood, but directly in the tank.
Signs of fault of gas station
Whatever the engine is equipped with your car, signs that something is wrong with the fuel supply device. These include:
- Lack of engine reaction to start attempts.
- Violation of the stability of the operation of the power unit at idle.
- Troy.
- Reduced power.
The design of the carburetor VAZ 2109
To understand why not shakes (carburetor), let's briefly consider its design. So, the fuel supply device "Nines" consists of:
- hull;
- pusher with mechanical swing lever;
- diaphragms assembly;
- covers with valves and fittings for fastening hoses;
- mesh filter;
- manual swing lever.
Principle of operation of mechanical fuel pump
The fuel pump is driven by the camshaft cam, which moves the pusher in the horizontal direction, forcing it to make reciprocating movements. The pusher, in turn, affects the mechanical paging lever, and he already raises the membrane rod.
Thus, inside a certain pressure is created, which is supported by the valves of the device cover. One of them misses fuel inside, not put it back, and the second pushes into the fuel line, which goes to the carburetor.
As you can see, the design is very simple, therefore, to determine the reason that the fuel pump does not pump, it is enough to disassemble it and check the condition of the main elements.
Pusher
Since the housing does not affect the operation of the fuel pump, if it is, of course, is not damaged, then start with the pusher. This element is made of steel and just can not break. But to wear - please, especially if it is not original, but bought in the form of a separate spare part. It is worth it to decrease by several millimeters, and the fuel pump does not pump fuel.
Rather, it shakes, but the amplitude of the diaphragm movement is significantly reduced. Hence the low fuel pressure in the system, and, as a result, interruptions in the engine. Standard Pusher Length for DAAZ Pumps - 84 mm. Measure its length, and if necessary, replace the exhaust detail.
Diaphragm
The most common diaphragm malfunction is its gap. It also happens that it is deformed. Due to these damage, the diaphragm begins to pass through itself fuel, which is also the cause of the pressure drop in the system.
You can detect such a malfunction, only disassemble the fuel supply device. If the fact that the fuel pump does not pump, the diaphragm is guilty, you will immediately see it. This problem is solved by replacing it.
Cover with valves and fittings
Kohl, you disassemble the fuel pump, do not be lazy to check and valves. One of them should insert fuel, and the other is to release. Just blow them and install how clear they work. If the valves do not cope with their tasks, replace the lid assembly.
Pump Filter and Manual Pader Lever
The first thing you see, disassemble the fuel supply device - a mesh filter. It is made of fine perforated plastic. The fact that he does not pump the fuel pump can also serve if his deformation or severe pollution takes place.
In the first case, the filter must be replaced, in the second - rinse with liquid for cleaning carburetors.
The manual swap lever towards the fact that the fuel pump does not pump the fuel when the camshaft rotates is not related. The only thing that can break it is a spring, which will fill it into the initial position.
Baszonasos does not pump: injector
As already mentioned, pumps in carburetor and injection engines have a different design. In cars with forced fuel injection, all processes associated with its feed in the combustion chamber are controlled by an electronic control unit, so there may be a breakdown of various kinds of electronic devices.
To the main reasons why the injector gas fuel pump can be attributed to:
- malfunction of the electric drive device;
- clogging of the filter of the pump;
- the failure of the relay;
- bind of fuse.
How to understand that the reason for the operation of the engine is precisely the fuel pump
Diagnose problems with fuel pump in a car with an injection engine much easier than in a car with a carburetor motor. The fact is that when the ignition is turned on, the sound of the fuel module electric motor is clearly heard. It lasts a few seconds. This sound suggests that the fuel pump turns, shakes fuel.
If this happens when the key is rotated, it means that everything is in order with the device itself, and the reason must be sought elsewhere. Well, and if, when you turn on the ignition, you do not hear the characteristic sound of the pump operation, you can be confident - the problem is in it, or in the elements of its energy availability.
Start with a relay and fuse
Considering that the fuel supply module is in the car's tank, and it is not so easy to get to it, the diagnosis is better to start with the relay and the fuse:
- Remove the fastening screws of the lid located on the left of the steering column.
- Under it, find the fuse F3 (15 A) and the R2 relay. These are the elements that we need to check.
- As for the fuse, it is necessary to "ring" the tester. In case of unsuitability - replace it.
Check the relay in the garage conditions are quite difficult. But you can take a similar (from a neighboring socket), a well-good relay, and put it instead of diagnosed. Now turn on the ignition. Shakes fuel pump? The reason was found! Well, if nothing has changed, go on.
Electric and filter
The fuel pump in the injector VAZ 2114 is the element of the fuel module, which is located in the car's tank. It also includes:
- coarse filter;
- fuel level sensor;
- pipes for connecting to the fuel line.
To get to the module, you must remove the bottom of the rear seat, disconnect the wiring harness and unscrew the 8 screws of the attachment of its cover. Remove all device assembly. First of all, inspect the coarse filter. If he is clogged, replace it.
To check the electric motor, you will need to connect it directly to the battery terminals. In the case of its normal operation, "ring" wiring and check the contact of the mass wire on the module lid. If the electric motor does not submit signs of life, the question "why not shakes fuel pumps" finally found its decision.
Trying to repair it independently inexpedient. Just buy a new motor and install instead of the old. And yet, you should not spend money on the purchase of the entire module, which is now worth about 3 thousand rubles. Buy a separate electric motor and a new filter. All this will cost you three times cheaper.
Without fuel, the engine does not work, and without the engine - everything else.
Many car owners, it happens, do not even know that there is a constructively electrical device for feeding fuel, located or in a tank or not far from it on their cars, and if they know about it only in theory.
To seriously think about yourself, the fuel pump can give when the car suddenly rises a stake in the middle of the road in a clean field. Gasoline is, the oil is normal, the spark is in stock, and the car does not go.
That's where questions begin and search for reasons.
Prerequisites suspect the electrical displacement in a malfunction can be such phenomena:
1) power loss,
2) the car is badly started even on the heated engine,
3) The engine stalls, troit, moving with jerks at a constant speed, idle "float".
4) noise, hum, buzzing, creaking, whistling from the tank (with a submersible pump) or from under the bottom of the body (with suspension)
In order of each paragraph:
Power loss.
The fact is that the fuel pump - although not to relate to consumables as the filter or tires, however, has its own margin of safety. Car manufacturer takes into account this fact and creates a fuel pump that presses at a voltage on a 12 volt pump, for example 8 bar, although the pump is installed on the pump, which blends up excess pressure, and triggers with 5 bars. The time and pump takes place, with the same voltage, the pump can already give a maximum of 6 bar and so on. Problems with engine power loss occur when the maximum pump pressure turns out to be lower than that in the fuel system for normal operation of the fuel equipment after the pump (overcoming the resistance of the fuel filter of fine fuel cleaning, the operation of the nozzles, etc., etc.). Which in general leads to an unavailable engine gasoline, and as a result of a power drop.
Poor to start.
A bad car can at various reasons, but why can one of them be a fault of a fuel pump? For normal operation of the engine, a certain pressure in the fuel system is necessary. Ideally, after the engine is muffled - the pressure in the fuel system is preserved, and when the ignition is turned on, the pump is loaded to the system for the start. However, with wear, there may be cases when the pump creates the necessary pressure over a larger period of time, and the valve does not hold pressure in the system as it should. As a result - the car is bad to start.
In some cases, the car can start after the car stood a little, although before it stalled and stubbornly did not start. It may say that a mesh of a fuel pump is clogged, or something prevents gasoline to fall into the flask, where the pump rolls it from.
If the car is started in time, or in general after pumping the pump is most likely worn by fuel pump or graphite brushes. It should not be changed independently, as even successfully soluble, to select the inside of the pump, replacing the brushes to the new, wolving the pump, it will work for a long time whether it will work, because graphite from a simple electric drift will erase for a month if not in a week, or destroy the fuel pump anchor, or destroy the fuel pump anchor, Once not that hardness, without the right additives, in gasoline.
Incorrect engine work
The engine works with interruptions or stalls - the problems are the same as in the preceding paragraphs: the grid is clogged, or the pump is faulty. Sometimes there are problems of wiring: the pump simply does not reach the pump, or as a result of a bad contact, the terminals are sparkled on the pump, etc.
The reasons for the failure is also a lot, among them the most popular are:
1) Riding on the "dry" tank
2) the work of the fuel pump when driving on gas
3) Pollution of the filter (grid) of the fuel pump to the state of "vacuum packaging", or a disruption of mechanical integrity.
4) water in the tank
5) dirt / rust / trash in the tank
6) Enclosure of the impeller / rollers of the pump by foreign objects in the tank.
7) Wear an anchor / pump brushes
8) Tank deformation and as a result of the damage / pump module.
9) Natural wear.
10) Handling / removal of gas station "Indians"
And so, in order:
When driving on an empty tank, the fuel pump is heated. This fact is at least obvious on the basis of the fact that gasoline is the only thing that surrounds the pump and cools it, and the only thing that passing through it lubricates it. In the absence of gasoline or its insufficient number, the pump is heated for two reasons: in the first mechanical friction of the fuel pump assemblies, and secondly due to DC passing in the pump (3-12 amps). As a result, the pump is heated, the gaps between the driving details are reduced from the heat expansion and as a result, a completely new pump can stop, and if the fuse does not burn - work as a boiler in the tank until the pump body is melted, the pump module, other adjacent elements, to the loss of contact between the terminals Baszonasos
When driving on gas, increased injuries of the pump depends in the same way as in the above paragraph from the presence of gasoline in the tank.
Gas car owners have a habit of forget about gasoline, without using them, and often the pump does not turn off shakes gasoline from the tank (if there is still gasoline there) on the fuel ramp to the engine, and since the car on the gas - from the hot ramp already hot Gasoline goes into the return to the pump, usually in the flask of the pump, which pours oil into the fire, contributing to heating.
When the grid is blocked, a completely normal pump may break in days. The pump grid, being scored - does not allow gasoline in the right amount.
Everything is not as scary and difficult, if it is not ignored. The scored grid can be cleaned, change and most likely it can help the car go fine, and the car owner will save on repair or replacing the pump. Sometimes the car loses in the power slightly, and then suddenly the symptom passes - the option is possible when the grid was clogged, and watched in the tank before the formation of such holes that are equivalent to the absence of a grid. It threatens all that can only be in the pump and the last breakdown.
Water in the tank. Although gasoline and weakness in water (0.001-0.004%) there are cases of water in the tank. This occurs when refilling with poor-quality fuels (even refueling emulsion of water and gasoline is possible after the recent visit of the fuel carrier at refueling), and with the natural process of condensation of atmospheric moisture inside the tank due to the temperature difference. Water leads to corrosion of the tank, and being heavier than gasoline, collects other particles from the bottom of the tank, wetting them and fascinating them.
Water adversely affects the fuel pump and the injector nozzles. If water turns out to be in fuel highways in winter, it can simply freeze and create a plug, because of which the engine is simply not started.
Dirt / rust / garbage in the tank
The dirt in the tank is usually falling in the same way as water - namely refilling by poor-quality fuels, but sometimes it turns out there after using special fuels with additives, or additives. The fact is that after entering special substances, intended to dissolve the mud collapse on the walls of the tank, the flare, being quite dense not dissolved, but flaps with flakes from the walls of the tank, placing the mesh of the benzonasos. Also, such additives can contribute to corrosion of the tank, with the participation of water, which leads to the appearance of rust, up to the loss of tank tightness.
Jumping the impeller / rollers of the pump by foreign objects that hit the tank usually occurs if the gas station grid has lost the integrity.
Wear an anchor / pump brushes usually occurs when driving without gasoline (per gas) or when it is on the tank's bottom. Gasoline, being the only lubricant, lubricates the driving surfaces of the anchor and brushes. With inadequate working conditions, the brush mechanism fails within two or three months.
The deformation of the tank and as a result of the destruction of the pump / pump module - the phenomenon, although rare, but still it happens. The most banal way is to catch a bodie, a hole, hitting the tank, from which the insides of the latter come into disrepair, however, it is just stopped to drive, when the tank cover is discovered, a whistle of the absorbed air into the tank is heard, and the tank when inspection turns out to be pricked. Cause: The adsorber of gasoline vapor is scored, because of which the air did not enter the tank. All because there are not many gasoline tank there, but as the fuel is used, it takes air passing through the adsorber, and if something is wrong with a "delivering", then the pump pumping fuel from the tank, creates reduced pressure In the tank, from which it can be flattened, and the vacuum can reach such degrees that the pump is no longer able to suck fuel and serve it to the engine.
The natural wear of the pump is inevitable, but it is very accelerated, when in the impeller / roller mechanism of abrasive - sand, shallow metal chips, etc.
An anchor-brush mechanism remains in excellent condition, the current consumed within the norm, and the increase in the gaps between the driving details leads to the loss of performance and reduce the pressure in the fuel system.
And finally, a few words about what kind of handicraft installation / removal of gas station "Indians".
The reasons and breakdowns at the invasion of the inexperienced and do not know in the fuel supply system, but for more than a dozen years of the practice of repair and replacement of fuel pumps, an idea has been formed, thanks to which 4 groups of influence of the human factor on the malfunction of the fuel pump and abnormal operation are:
- Installation is not a native pump. (For example, on the Passat from the Vase, etc.)
- Installing the pump without grid.
- Wrong pump installation, pump module, mesh.
- Installing the pump without a special tool.
Read more about "Indians" - read in the next article.
