DIY fuel pump repair vaz 2110 injector

In detail: do-it-yourself repair of a vaz 2110 fuel pump injector from a real master for the site my.housecope.com.

In the “top ten”, as in other cars, where power plants for fuel are installed, the fuel pump serves as an element that pumps fuel in the “fuel tank motor” scheme. It supplies gasoline to the metering component, the function of which, depending on the device of the fuel complex, is played either by a carburetor or an injector in the system of injection engines.

In cars of different types of fuel supply, they use an electric fuel pump injector, or a mechanical fuel pump on carburetor modifications. Accordingly, in order to buy a gasoline pump, you need to know what type of gasoline units are installed and operated in a car that requires repair of the fuel system.

Buying VAZ 2110 gas pumps, the price of which is affordable for most of our motorists, should be factory made. Of course, this part for an injection engine is structurally more complicated and costs more, but the price limits are very reasonable and permissible within their boundaries. In addition, the fuel pump injector, the price of which is higher than the analogue on the carburetor engine, is technologically more complicated and has a number of significant advantages.

Product diagram for injection engines:

Mechanical products are used in cars with a carburetor fuel system, where fuel is transmitted under low pressure, and electric petrol pumps in vehicles with injection fuel equipment, where gasoline is supplied under high pressure.

1. Fuel pump on vehicles equipped with a carburetor as a metering device. The drive lever (pusher) is in constant frictions, but the shift of the diaphragm to the lower plane occurs only when it is necessary to fill the product chamber with fuel. The return spring moves the diaphragm to the top position, thereby supplying fuel to the metering unit. The composition of the mechanical fuel pump:

Video (click to play).

Fuel filling chamber;
Inlet and outlet valves;
Diaphragm seal;
Spring return action;
Pusher (drive-type lever);
Cam;
Camshaft.

2. Electric fuel pump for injection cars. Such a device is similar in principle to the mechanical prototype: the core is drawn into an electromagnetic valve until the contact group opens, blocking the flow of electric current. The composition of this product:

Fuel filling chamber;
Inlet and outlet valves;
Diaphragm seal;
Spring return action;
Electromagnetic valve;
Fuel pump mesh;
Core;
Contact Group.

We inform beginners where the VAZ 2110 fuel pump is located: it should be looked for under the car's aft seat cushion.

Unit malfunction symptoms:

a metallic howl or increased noise during its operation is determined by ear;
the product does not pump fuel or contacts do not work;
the power of the power unit is sharply reduced.

First of all, we check the pressure of the fuel pump “tens” in the common fuel system by connecting the pressure gauge to the fitting. When the pressure in the product is more than 3.3 kgf / cm2, it becomes clear that the malfunction is a defect in the pressure regulator, which requires replacement. If the pressure gauge readings are less than 2.8 kgf / cm2, it is necessary to replace the fuel filter of the gasoline pump, due to which a defect occurred.
If the car continues to fail, it is advisable to dismantle the fuel block and clean the fuel filter mesh.

In other cases, the fuel pump VAZ 2110 injector is replaced, becauserepair of the product did not give positive results. Also, when checking this electrical device, it is required to test the fuel pump relay, which is prone to elementary "sticking". It is not superfluous to check the unit fuse, which may also blow out and require replacement.

Such a replacement is carried out in the following cases:

failure or incorrect readings of the fuel sensor;
weak throughput effect or defect in the fuel intake grid;
failure of the electric petrol pump.

From the tools you will need a screwdriver and a "10" socket wrench with a knob.

Reduce the pressure in the fuel supply system.
Disconnect 2 hoses in turn using the lock for the fuel supply hoses.
Disconnection should be carried out slowly, without the use of unnecessary force, so that the unions of the fuel block remain intact.
Unscrew 8 nuts around the circumference of the pressure ring and remove it.
A wire with negative polarity is attached to one of the nuts; it must be removed carefully.
We take out the electric pump unit from the fuel tank, tilting it a little, for the safety of the lever of the fuel level indicator sensor, otherwise it will give incorrect parameters.
Remove the rubber sealing ring of the fuel block. If its properties are lost, it is necessary to replace the product.
Install the product in reverse order.

Important: during installation, the installation arrow on the cover of the electric pump must point towards the stern of the car!

Important: when installing the fuel hoses, be guided by the direction of the fuel supply indicated by the arrows!

Many people ask, where is the VAZ 2110 fuel pump relay? We explain that this electronic device is located in a special recess on the side of the front passenger on the floor. It is necessary to unscrew the plastic cover, there will be 3 relays. Closer to the hood is the part you are looking for.

An unscheduled replacement of a mechanical type device takes place in the following order:

We dismantle the air filter.
We remove the fuel supply pipeline to the fuel pump.
First, we relax the tightening of the clamp.
Remove the fuel supply line to the carburetor.
Unscrew the fasteners of the product.

Installation is in the reverse order. At the same time, do not forget to look at the products with arrows showing the direction of movement of fuel to the carburetor.

The question is often asked, how to check the VAZ 2110 unit in operation? To do this, with the pump lever depressed, tighten the screws on the cover and test the carburetor accelerator pump.

Welcome!
Gasoline pump - it is also called a fuel pump, but the most key word in these terms is, of course, a pump, thanks to this unit, gasoline that is in the gas tank of a car under pressure is supplied to the car engine, and it is already driven by this gasoline that works, therefore this part is very important when the engine is running and if it fails, then the car may stop starting altogether, or it will start, but it will lose all its throttle response and power and thus it will become poorly accelerated and will consume more gasoline, and why will it consume more gasoline in this case you ask? Explaining! On a faulty pump, gasoline is supplied to the engine under different pressures (Usually it is less than what it should be, but it should be about 3.8-4.0 kgf / cm2.), So the car starts to drive badly and in this regard, you constantly have to put pressure on gas, and thus, it turns out that the harder you press on the gas (and it’s not easy to press, because the car will not go), the more gasoline in the tank is consumed.

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4) Next, start removing the fuel pump mesh (This is the same filter that was discussed above), for this, pry it with a screwdriver as shown in the photo below, and after it moves down a little, put the screwdriver aside and gently disconnect it with your hand, when it is disconnected, use a screwdriver to remove the lock washer that is in it (indicated by the red arrow) and straighten it when it is removed and put it in its place.

5) Next, you will need to remove the housing inside which the electric motor of the pump itself is located (the housing is made in black, see the photo below), for this, press the housing down by hand (the springs will prevent pressing, but overcoming the force of these springs still press the housing) and remove the cotter pin that fixes the pump and thereby remove the housing with the electric motor.

6) Then unscrew the two screws (indicated by the arrows in the first photo) that secure the cover and then remove it (see photo 2), when the cover is removed, remove the rubber grommet after it (see photo 3) and thus after these operations, remove the fuel pump electric motor itself from the housing (see photo 4) and replace it with a new one if it suddenly becomes unusable.

Note!
Inside the housing where the electric motor of the fuel pump is located, also remove the rubber bushing with your hands, if you find deformation on it, for example cracks, breaks, then replace this bushing with a new one!

Assembly:
All parts are assembled in the same way as disassembled, but only in the reverse order of removal.

Important!
On cars of the tenth family, different engines were used, ranging from 8 valve carburetor and ending with 16 valve injection 21124, respectively, and the gas pumps on all these engines were different, for example, this article was written on repairing a pump on cars with an 8 valve engine (Injector), if you want to study an article on how to repair this pump on 16 valve cars, then in this case, read "this article", and if you have a carburetor engine, then you will need to read an article entitled: "Repair of a gas pump on a VAZ 2108 "(Do not pay special attention to the make of the car, because the carburetor engine in cars of the VAZ 2110 family was installed from the eight)

Additional video clip:
In addition, study two interesting videos just below, in them the pump disassembly is not particularly shown, but it explains how it can be checked (whether it works or not), and you will also find a lot of useful tips for yourself in these videos. (In the video below, a VAZ 2109 car is used, but you also do not pay attention to this, because the 8 valve injection engines were also installed on the same nines and tens)

Note!
If you want to replace the mesh (the Filter can be said) at the gas pump, but you do not know how to remove it, in this case, check out the roller located below:

The fuel pump is one of the important elements of the fuel system of any car. Its main task is to supply fuel from the tank to the distributor rail and injectors under the required pressure. Read about the VAZ 2110 mechanical fuel pump here.

And it is located in a car of domestic production directly in the tank of the car. Let's take a closer look at the VAZ 2110 injector fuel pump.

As mentioned above, the pump is located in the tank of the car, while it is immersed in fuel. It would seem a dangerous neighborhood (of fuel and an element driven by an electric current), but I dare to rest you, such an arrangement of the pump does not pose any danger and is done for the following reasons:

an electric motor is located in the pump, which directly drives the pumping element itself;
a bunch of these nodes must not only supply fuel, but also do it under significant pressure.

All of the above, in turn, leads to the fact that the pump is noisy and requires cooling. It is for these purposes that it is immersed in the fuel tank: the fuel acts for the fuel pump both as a cooler and as a soundproofing compound.

By the way, the described scheme is applicable not only to the VAZ 2110, but also to most injection vehicles.

As for the "ten" itself, it uses a Bosch gasoline pump.

This pump is capable of creating a pressure in the fuel system of 3 atm. It is located in the so-called fuel assembly in the car's tank, which, in addition to it, includes a fuel level monitoring system and a pre-filter mesh. The VAZ 2110 fuel pump is controlled by the electronic control unit (ECU) of the engine, through the corresponding relay.

Fuel from the fuel pump is supplied through the fuel line to the fuel rail, having previously passed through a fine filter. The fuel rail is connected to the injectors. The latter, on commands from the ECU, inject fuel into the engine manifold.

At the same time, the pressure regulator, which is part of it, allows maintaining the required pressure in the rail. It relieves excess pressure through the fuel line back to the tank.

The main malfunctions of the "dozens" fuel pump include cases when it does not create the required fuel pressure or does not work at all. Moreover, the reasons for both the first and second cases can be: breakdown of both the pump itself and the elements that control it; condition of the fine filter and tightness of the fuel line.

By the way, in the event of a breakdown of the VAZ 2110 fuel pump itself, it is not repaired (it is replaced). The following factors of car operation are capable of leading to this:

the habit of driving with an almost empty tank, due to which the body of the fuel pump is almost always in a semi-dry state, causing it to overheat and sudden failure;
non-observance of the regulations for replacing filter elements in the fuel system - leads to an increased load on the gasoline pump, because it has to not only maintain the necessary pressure in the fuel system, but in parallel with this, also push gasoline through a filter clogged with dirt.

Considering the above, I would like to advise you to take care of your car and follow all the recommendations of its manufacturer. Only with such an attitude can you expect that he will respond to you with devotion and will not let you down at a crucial moment.

Video on the removal and disassembly of the VAZ 2110 fuel pump

The first modifications of the VAZ 2110 with a carburetor injection system were equipped with mechanical fuel pumps

With an electric gas pump, things are much more complicated. Its design is based on a small electric motor. It is no different from usual, although it works completely submerged in gasoline. The pressure in the system here is created not by a membrane (although there are such pumps), but by a special-shaped impeller mounted on the motor shaft.

The service life of the electric fuel pump is 150-200 thousand kilometers. But it can fail much earlier. The main cause of breakdowns with an unused resource is additives added to gasoline, as well as various kinds of mechanical impurities. The former destroy the brushes and the manifold, while the latter clog the valve mechanisms.

The symptoms of a pump malfunction are the same, regardless of its design and the type of injection system. These include:

difficult starting of the motor;
unstable engine idling (vibration, tripping, stopping the power unit);
dips during acceleration in motion;
decrease in the power and traction qualities of the motor;
the absence of the characteristic sound of starting the gasoline pump (for injection engines);
the presence of traces of fuel leakage (for carburetor power units).

It is quite problematic to independently determine the malfunction of the gas pump, because the first three signs, which are the main ones, may indicate other problems in the fuel system, such as:

clogged fuel filter;
problems with the sensors of mass air flow, throttle position, oxygen level, etc.;
clogging of one or more nozzles;
failure of the pressure regulator.

In addition, similar symptoms are observed when problems with ignition occur.It is possible to establish that the reason for the listed symptoms is precisely the fuel filter by checking the device.

To check a mechanical fuel pump, you will need the following tools and tools:

a screwdriver with a Phillips bit;
slotted screwdriver;
key (head) 10;
key for 13;
2 clean dry plastic bottles with a volume of 2 liters;
a piece of hose (50 cm) of the same diameter as the fuel one;
1-1.5 liters of gasoline;
vernier caliper (ruler);
stopwatch (clock).

Let's start with performance. A serviceable mechanical fuel pump VAZ 2110 with a known clean filter must pump at least 1 liter of fuel per minute. The verification algorithm is as follows:

We raise the hood, we find the pump.
Using a screwdriver, unscrew the screw of the pump outlet hose clamp. We loosen the clamp, remove the hose from the pump fitting. Performance check consists in measuring the amount of fuel pumped over a certain period of time
We put on a piece of the prepared hose on the outlet fitting, and put its other end into one of the empty bottles.
We fill the second bottle with gasoline. We lower the hose from the carburetor, removed from the pump, into it. When the float chamber runs out of fuel, it will be sucked from the bottle.
We start the engine, set the speed at 2000 rpm, turn on the stopwatch and observe the operation of the fuel pump. If the amount of fuel pumped over in 1 minute is less than 1 liter - the fuel pump is faulty

If the amount of pumped fuel per minute is less than a liter, the pump is faulty. The reasons for this may be:

faulty valves;
rupture of one or more membranes;
clogging of the pump mesh;
wear of the drive rod (pusher).

We carry out further verification in the following order:

If you find problems with the fuel pump, you can try to repair it yourself, or replace it with a new one. In the first case, it is better to buy a repair kit. It includes all elements of the device that may fail: valves, gaskets, diaphragms and pusher.

If you decide to replace the pump assembly, it's even easier.

After dismantling the faulty device, you need to:

Install new gaskets and pusher.
Install the pump in place, secure it with nuts.
Connect the fuel line hoses, fix them with clamps.
Press the manual priming lever several times to fill the pump with fuel.
Start the engine and check its operation. The new fuel pump is installed on new gaskets

Unlike a carburetor engine, where the fuel pump has a mechanical drive, on the injection VAZ 2110/2112, special relays and a fuse are responsible for the operation of this device. Therefore, before proceeding to the diagnosis of the pump itself, it is imperative to check the indicated elements. If at least one of them is faulty, the pump will not work at all.

Switch on the ignition without starting the engine and listen. A working gasoline pump emits a characteristic "whistle" when starting. If it is not there, then either the pump itself is out of order, or one of the elements of its power supply circuit.

The pump relay and fuse are located in an additional mounting block located inside the vehicle's center console. It can be accessed by removing the plastic trim (near the front passenger's left foot). It is attached with several self-tapping screws. Under the cover you will find three relays and three fuses. Usually, the protection elements of the fuel pump chain are located in the center.

The relay and fuse are located in an additional mounting block under the cladding

To check the fuse, remove it from the socket and "ring" the tester. If necessary, replace it, observing the rating (15 A). It is unlikely that it will be possible to test the relay for operability without special equipment. But you can take another relay, for example, the radiator fan (far left), and install it in the place of the diagnosed one.Turn on the ignition and listen to if the fuel pump is working. If yes, buy and supply a new relay. If the problem persists, continue diagnostics.

To check the fuel pump relay, you can install a radiator cooling fan relay in its place

But even the fact that the fuel pump starts pumping when the ignition is turned on does not mean that it is working properly. The main indicator of its work is the pressure in the system. You can check it using a conventional pressure gauge with a measurement range of 5-7 atmospheres, which is used to measure the pressure in the tires. In addition, you will need a section of a gas-resistant hose with an inner diameter of 9 mm and two clamps of the appropriate size.

The check procedure is as follows:

We bleed the pressure in the system. To do this, disconnect the negative terminal from the battery. We remove the plastic lining of the additional mounting block, which contains the relay and the fuse of the gasoline pump. We take out the fuse from the socket. We connect the removed terminal to the battery. We start the engine and let it run until it stalls. After that we put the fuse in place.
On the fuel rail, we find a fitting specially designed for measuring pressure. Using the wheel valve cap, unscrew the spool from the fitting. The connection is specially designed for pressure measurement
We put one end of the hose on the fitting, fix it with a clamp. We connect the other end to the pressure gauge and also fix it with a clamp.
We turn on the ignition and wait while the pump pumps fuel into the system.
We look at the readings of the pressure gauge. To measure the fuel pressure in the rail, a conventional tire pressure gauge is suitable.

For engines with a volume of 1500 cm 3, it should be 2.8-3.2 atmospheres, and for power units with a volume of 1600 cm 3 - 3.6-4 atmospheres. If the indicators of the device are lower, the pump is unsuitable for further operation.

Checking its performance will help to make sure that the fuel pump is out of order. This will require:

a screwdriver with a Phillips bit;
a section of a gas-resistant hose (50–80 cm) with a clamp;
key for 17;
an empty plastic bottle with a volume of 2 liters;
a piece of insulated wire;
stopwatch.

The performance check is carried out as follows:

We remove the back seat. We lift the carpet and find the gas tank flap under it. Unscrew the two screws (diagonally).
Removing the hatch reveals the top of the fuel module. Using a 17 wrench, unscrew the exhaust union nut. We put a hose on it and fix the connection with a clamp. We lower the other end of the hose into an empty bottle.
Disconnect the pump power connector. We supply power from the corresponding battery terminal to the positive contact of the device using a piece of wire. We short-circuit the minus to ground.
We start counting the time from the moment the pump starts.

A serviceable fuel pump of an injection VAZ 2110/2112 should pump 1.5 liters of fuel in one minute. If this figure is lower, the pump must be replaced.

a screwdriver with a Phillips bit;
thin slotted screwdriver;
key for 17;
key for 7;
key for 5.

The procedure for replacing the fuel pump:

Having completed the assembly, we check the operation of the new fuel pump.

The process of replacing a VAZ 2110/2112 fuel pump, regardless of its design, does not require any special skills and can be performed independently. However, if you are not particularly confident in your own abilities, it is better to contact the nearest car service.

If the dynamics of the car sharply decreased, "dips", jerks during movement began to be observed, and after parking the car would not start. You may have to resort to repairing the gas pump. Mechanical petrol pumps are less and less common, as they are not efficient enough to meet the needs of injection and diesel vehicles.

Electric gasoline pumps can be submersible (located in the gas tank), and pumping up. Their common function is the same - to provide fuel supply to the intake system.

Gasoline pumps of machines of the old generation are mechanical. Over time, their gaskets dry out and must be replaced. For replacement, only a screwdriver and a repair kit are needed. We remove the fuel pump, rinse it with gasoline (so that the dirt does not clog inside), untwist it and take out all the parts, remembering the order in which they are located. We replace the old parts with new ones from the repair kit. We collect the fuel pump on new gaskets. We carry out the assembly by tightening the bolts crosswise for a uniform clamping force. It happens that the reason is a breakdown of the fuel pump valve. It can be pressed out and replaced. But the part is extremely rare on sale as a spare part, and the replacement is quite difficult, so it is more advisable to buy a new gas pump. Also, a weakened diaphragm spring can serve as the cause of poor operation of the fuel pump at high engine speeds. Its normal length is 47mm. If, when measuring, the length differs from the standard, then the spring must be replaced.

There can be several reasons for the breakdown of the electric gasoline pump: this is a breakdown of the motor, a rupture of gasoline pipes in the body of the gasoline pump, a dirty mesh (internal filter). We remove and disassemble the fuel pump. The internal filter, corrugated pipes and the petrol pump motor can be found at auto dealerships.

Having disassembled the fuel pump, we look at the condition of the conductive rotor plates. If you have experience and a soldering iron, you can replace worn plates by replacing them with new, homemade ones. We grind new plates to perfect condition.

Diy fuel pump repair scheme:

With the replacement of pipes, everything is easier: a new gasoline pipe must be heated in boiling water until the rubber softens and put on the place of the old one.

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The motor with the mesh can be changed without problems - we install new ones in place of the old parts, we assemble everything. As a rule, after such manipulations, the gas pump works like new.

Replacing a fuel pump with a VAZ 2110 is not included in routine maintenance during maintenance, it is changed in the event that its performance drops below normal or it completely fails. Subject to all the recommendations, the VAZ 2110, 2111 and 2112 gasoline pump should serve about 100 thousand kilometers. You only have to remove the fuel pump to clean or replace the coarse mesh filter. And how to change a gas pump on a VAZ 2110, watch the video, which clearly shows the whole process.

First of all, we disconnect the power connector (bend the latch on the plug and pull);
Then unscrew the fuel pipes (open end wrench on "17");
In a circle, unscrew the nuts securing the pump pressure plate (head to "7");
We take out the gasoline pump assembly from the gas tank (carefully so as not to damage the float).

See the video for the main points with important nuances on replacing a gas pump.

An electric fuel pump is installed on VAZ 2110-2112 injection vehicles, in contrast to old models of engines (carburetor), where the usual one was. In the event of its failure, gasoline will stop pumping into the system and the car simply cannot be started. In this case, it will be necessary to replace the pump. You can do this without any problems on your own, having the necessary tool at hand:

Flat and Phillips screwdrivers
Ratchet handle
Extension
7 mm deep end head
Open end wrench 17 mm

First of all, according to the instructions, it is necessary to relieve the pressure in the fuel system by removing the fuel pump fuse and starting the engine, wait until it stalls. But in fact, you can not do all this, and it is enough to wait a few hours after the last start of the engine, and you can start repairing.

So, to get to our part, you need to fold the rear seat, since the hatch is located on the right side of the underbody of the car. When the chair is folded back, it is necessary to slightly raise the carpet and find the cover under which the pump is located, and unscrew the screws of its fastening. This is shown more clearly in the photo below:

Then we disconnect the plug with the power wires, having first bend the latches:

Next, using a 17 key, turn off the fuel fittings, there are only two of them, and in the photo they are indicated by arrows:

Then take the fuel pipes back so that they do not interfere:

Next, you can start unscrewing all the pump mounting nuts, or rather its pressure plate in a circle using a deep head and a ratchet handle:

Then carefully lift the round plate and remove it:

Then, using a flat screwdriver, we pry the sealing gum in a circle, as shown in the photo below:

And when the gum has lagged behind along the entire circumference, you can carefully, without sudden movements, try to take out the VAZ 2110-2112 gas pump, first lifting it slightly up:

And tilting it about 90 degrees, finally remove it from the tank, taking care not to damage the float on the fuel level sensor:

Video (click to play).

Now you can take a new one and install it in reverse order to its original place. The price of such a part can range from 2,000 to 3,000 rubles, depending on the manufacturer. It is also worth noting that the sealing gum can deteriorate over time, so replace it too if necessary.

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