Fuel pump VAZ 2107 injector does not work, diagnostics

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You can delve a little deeper into history, since now we will talk about why the fuel pump does not work on a VAZ 2107 car. And the conversation will be about the carburetor engine. Consequently, the fuel pump is driven by a rod installed in the cylinder head. But first you need to consider the design of the device and understand what can fail.

VAZ 2107 power supply system (carburetor)

The purpose of the engine power system is to store and purify fuel, mix with air and supply the mixture to the engine. The power system includes:

Gas tank.
Fuel pump
Level sensor.
Fine fuel filter.
Coarse fuel filter.
Fuel lines.
Fuel rail with injectors.
Air filter
Air supply sleeve.
Throttle valve.
Fuel vapor recovery system.

Checking the VAZ 2107 fuel pump (injector)

The fuel pump on VAZ injection models often stops working due to a malfunction in the power supply circuit.
If you can't hear the fuel pump running when the ignition is on, you should start with a simple check of the wiring and pump. In the glove compartment area there are three relays on a special mount. The middle one is responsible for the operation of the fuel pump. The check should begin with fuse F3, which powers the fuel pump. If the fuse is working, you need to pay attention to the relay, wires and power supply contacts. If not, replace the fuse.

To check the power supply to the fuel pump:

Remove the relay from the mount.
Check the presence of a “plus” on the thick pink wire on the fuel pump relay (the ignition must be on).
If there is a “plus”, connect the pink wire with the gray one going to the fuel pump (relay contacts “30” and “87”).

If, when the gray and pink wires are shorted (if there is a “plus”), the fuel pump does not work, the fault is either in the wiring going to it or in the fuel pump itself. Power connectors located in the trunk especially often fail. This is where you should start checking. There are two of them. The first has an elongated shape and black color, the second is white, located on the fuel pump cover itself. The second can be checked only by removing the fuel pump (by pulling it out of the gas tank). It is also worth checking for ground on the fuel pump housing.

If the fuel pump turns on when the gray and pink wires are shorted, you should check the presence of power at 86 and 85 relay contacts. You also need to check the functionality of the relay. The easiest way to do this is to temporarily install a known working relay.

If the fuel pump makes noise, but does not pump, or does not produce enough pressure, you should try replacing the coarse filter.

Where is the fuel pump located on 2106, 2107 and other models

The location of the fuel pump on carburetor and injection classic VAZs is different. In the first, it is installed on the left (as viewed from the passenger compartment) on the engine cylinder block on a special boss, and is attached to it using studs through a heat-dissipating ebonite spacer. The mechanical fuel pump is driven from the engine intermediate shaft through an eccentric and a pusher (rod).

The mechanical fuel pump on the classic is mounted on a special boss on the engine cylinder block

In injection Zhiguli cars, the pump is included in the design of the fuel module. It is located inside the gas tank. The design of an electric pump consists of a DC electric motor and a specially shaped impeller mounted on its shaft. The electric motor is powered from the vehicle's on-board network. The electrical circuit of the device is protected by a separate fuse and relay.

The electric fuel pump on injection classic models is installed in the gas tank

Removing the VAZ 2107 fuel pump (injector), replacing the coarse filter

To replace the filter, you must remove the fuel pump from the car. You will need:

Key for 7.
The key is 17.
Crosshead screwdriver.
Flathead screwdriver.
New coarse filter (if necessary),
New sealing rubber gasket (if necessary).

Before starting work, it is necessary to relieve the pressure in the engine power supply system. This is easy to do: turn off the fuse, start the car and wait until the gasoline pumped into the fuel line is used up. This is worth doing if the fuel pump is working, although poorly. A non-working fuel pump will certainly not create pressure, so you can immediately remove the filter for inspection. The order of further operations is as follows:

Disconnect the ground terminal on the battery to prevent a short circuit.
Using a Phillips screwdriver, unscrew the 4 screws holding the gas tank trim.
Remove the trim.
Unscrew the clamp bolt to free the tank and provide access to the fuel pump (a 10 mm wrench is required).
Unscrew the fuel pump pipe fitting using a 17 mm wrench.
Disconnect the power supply connector.
Unscrew the 8 pump mounting nuts using a 7 mm wrench.
Carefully remove the VAZ 2107 fuel pump (injector) together with the fuel level sensor float from the hole in the gas tank. If you can’t immediately remove the fuel pump, you can try to pry it out with a flat-head screwdriver.
Remove the collection bag (coarse mesh filter) by prying it on the sides with a pair of screwdrivers.

Electric fuel pump device

injection pump

ordinary and conditionally can be divided into two parts:

The most important thing is its structure itself. The fuel pump in the VAZ 2107 is a replacement. The fuel pump fuse (injector) is also clogged. Testing and replacement of the VAZ injector fuel pump, replacement of the VAZ 2110 fuel pump. The electric fuel pump itself is hermetically sealed to protect against the ingress of fuel. The fuel enters the pump through the filter and the intake hole and is supplied to the power system through the outlet hole (sealed from the electric motor).

Here is such a scheme you can find. I would like to point out that it does not happen that the rotor of the engine spins in water and, moreover, in gasoline. Return to contents Description of work. The location of the VAZ 2110 injector fuel pump is in the gas tank located under the bottom of the car, in the area of the rear seat. Firstly, a spark appears on the collector when the engine is running. You yourself realize that this will lead to a fire. Replacing a VAZ 2107 fuel pump: photos and videos. Checking and replacing the VAZ 2110 fuel pump can lead to overheating of the VAZ-2110 injector fuel pump. Secondly, rotation of the rotor in water is so difficult that gaining speed and developing pressure is simply out of the question.

Installing a fuel pump

Before installing the fuel module (fuel pump with fuel level sensor), you must carefully check the condition of the rubber gasket that ensures the sealing of the connection. At the slightest suspicion, it is better to replace it. It is cheap, but re-installing/removing the fuel pump when a fuel leak occurs is a labor-intensive task.

When tightening the eight fuel pump mounting nuts, you must be careful not to strip the threads.

Further operations are performed in the reverse order of removing the fuel pump.

After installing the fuel pump and connecting the pipes and power connector to it, you should check the operation of the system. To do this, you need to start the engine and make sure the connections are tight.

Checking and adjusting the lead angle

To check whether the ignition is set correctly, just align the marks on the crankshaft pulley and the timing cover. In this case, the slider should be directed to the 4th cylinder, and the contacts should be open. If the slider “looks” towards the first cylinder and the car does not start, then turn it 180° as described above.

To create optimal fuel combustion conditions in the chamber, the flash should occur a little earlier than the piston reaches TDC. There are 3 ways to achieve this:

when installing the ignition, align the notch on the pulley not with the first long mark, but with the second, indicating an advance angle of 5°;
determine the amount of advance “by ear” by loosening the nut securing the distributor and turning it by the housing at idle engine speed;
connect a strobe light to the system, start the engine and by turning the distributor, adjust the position of the notch by pointing the flashing lamp of the device at it.

The advance angle is adjusted by turning the distributor housing

Once the settings are complete, press the gas pedal sharply several times. If you can hear the piston pins knocking (a ringing sound is clearly audible from the engine), then the advance angle is too large. Loosen the distributor and turn it 1-2° clockwise, then check again by pressing the accelerator.

Diagnostics

The primary conclusion whether the fuel pump is working or not can be assessed by ear when the ignition is turned on. If you don’t hear a quiet buzzing noise from behind, then you need to check the voltage supply to the gas tank block and then draw a conclusion about its malfunction.

You can check the serviceability of the fuel pump using the MTL-2 pressure gauge; this is the most correct way. You can somewhat roughly estimate the pressure using air pressure gauges to check tire pressure. To do this, screw a rubber hose to the sensor and connect it to the fuel system.

You can do without instruments at all; to do this, unscrew the fuel hose from the filter, place a container and turn on the ignition. In one minute, about 1 liter should be poured into the container.

The pressure of the VAZ 2107 injector fuel pump when the ignition is on should be 4.0 atmospheres, and when the ignition is running 2.8-3.2. In reality, the pump pressure is different and was slightly less, but this may be an error in the pressure gauge.

The carburetor pump is checked by setting the camshaft position by cranking the engine so as to ensure free movement of the pump foot. The hose is unscrewed from the carburetor or filter and the presence of fuel supply is determined by pressing the foot.

What fuel pumps were equipped with classic VAZ models?

Classic VAZs include all models of the Zhiguli family, produced from 1970 to 2012 and their modifications:

VAZ 2101;
VAZ 2102;
VAZ 2103;
VAZ 2104;
VAZ 2105;
VAZ 2106;
VAZ 2107.

Depending on the year of manufacture, the engines of these vehicles were equipped with different fuel systems. In all the first Zhiguli models, the fuel mixture was injected into the cylinders using a carburetor, and the fuel was supplied by a mechanical fuel pump. The latest modifications of the VAZ 2104, 2105 and 2107 had an injection system and an electric fuel pump.

Carburetor cars of the Zhiguli family were equipped from the factory with mechanical fuel pumps of the diaphragm type DAAZ 2101 (catalog number 1106010) produced by the Dimitrovgrad Automotive Unit Plant. Thanks to their simple design, reliability and maintainability, they have proven themselves well not only on the “classics”, but also on cars of the Sputnik and Samara families, which were equipped with their modified versions.

Carburetor VAZ 2101–2107 were equipped with DAAZ mechanical fuel pumps

Injection Zhiguli models were equipped with domestically produced electric fuel pumps. They were produced by the Pekar and Utes enterprises under catalog number 21073–1139009. The latest modifications of the Zhiguli were equipped with products (catalog number 2112–1139009). The same devices were installed on all models of the Samara and Lada families.

Injection models of classic VAZs were equipped with electric fuel pumps “Pekar”, “Utes”, “Bosch”

How to replace a VAZ injector fuel pump

To replace the fuel pump on an injection vase you will need:

key to 10;
2 keys for 17;
key to 7;
crosshead screwdriver;
a simple screwdriver.

I recommend removing the gas tank mount for ease of repair work. To remove the fuel pump you need:

disconnect the pressure relief pipes in the gas tank;
Unscrew the main pipelines using 2 17mm wrenches;
remove the gasket from the gas tank neck;
unscrew the tank mount;
move the tank to the side;
remove the power and fuel level block;
unscrew the fuel pump flange;
remove the fuel pump filter;
remove the tube from the pump after heating it;
We take out the old pump and install a new one.

When installing the filter, do not hesitate to give it a good tap, otherwise it may fall off like mine. The fuel pump mesh on the VAZ injector is replaced if the old one is dirty or torn. Its replacement is carried out in the same way. Usually it is sold complete with a fuel pump; if not, you will have to buy it, the price is 25 rubles.

Reassemble in reverse order. We heat the hose again in boiling water; if the mounting location of the old electric fuel pump does not allow the part to be properly secured, then we cut it off.

Check the integrity of the gasket between the flange and the gas tank; if it is torn, there will be a smell of gasoline in the cabin.

Important. When choosing, pay attention to performance and maximum pressure. I had Bosch 0 580 454 456 and replaced it with a close analogue of FR 453-453 from WEBER.

Characteristics:

OEM part number 21083-1139009-01;
Installation of VAZ 2108 - 2115;
Pressure - 580 kPa;
Productivity - 60 l/min;
Voltage - 13.5 V.

Consumption per 100 km at a speed of 120 is about 8 liters. Very pleased.

Replacing the fuel pump VAZ 2107 injector video:

In VAZ 2107 cars, a submersible pump located in the tank is used to organize the fuel supply to the engine with an injector. It provides not only the flow of fuel, but also the necessary operating pressure required for normal operation of the internal combustion engine.

Any malfunctions in it greatly affect the performance of the engine, the dynamic and traction characteristics of the car as a whole. Therefore, in case of problems, it most often requires replacement. In rare cases, it can be repaired.

Fuel pump VAZ 2107: description

The pump from the seven is a module installed in the tank. The device is implemented together with a float fuel level, the pump itself is located at the very bottom of the tube and is equipped with a simple strainer.

The latter is intended for the primary purification of fuel from various large debris in the form of rust flakes, water and other large particles.

The pump is implemented in a non-separable housing, but is easily detachable from the fuel pump module, to which it is attached using a latch. The assembled module is screwed to the tank body using 8 x 7 nuts.

The pump body is made of special steel by stamping, inside which there is a roller mechanism with a predominantly ceramic cage. It is these parts that are most susceptible to wear when pumping heavily contaminated fuel that has not been cleaned after passing through the filter.

When deciding to replace a device, you need to know the exact number and model. This information may not be on the case, so you should buy from reliable sellers.

Replacement stages.

1. First of all, it is necessary to loosen the fastening of the fuel mixture supply and discharge hoses. To do this, use a Phillips screwdriver to unscrew the holders located on the clamps.

2. The next step is to remove the fuel conductors from the fitting. You should first prepare the bolts that will act as plugs. Of course, you don’t have to use bolts, but in this case most of the gasoline will spill out.

3. Next, unscrew the nuts that secure the pump. To do this, you will need a thirteen socket wrench.

4. After the fastening nuts have been loosened, it is necessary to remove the element from the racks and at the same time dismantle the sealing element.

5. The next step is to dismantle the heat insulation element along with the drive mechanism.

Before dismantling the second seal, it is worth first marking its position with a colored marker or other visible method. This will make the reinstallation process easier.

It is also important not to mix up the first and second seals.

Mechanical pump

6. Now, let’s begin installing the new original VAZ 2106 fuel pump. A working pump is installed in the complete opposite order. To increase the service life of a new fuel system element, it is worth periodically checking the adjustment of the sealing gasket. Correct shim adjustment is determined as follows. When turning the crankshaft, the drive that pushes the pump should protrude to a minimum amount. At this moment, we look at how tightly the gasket fixes the element.

Once the new pump is in position, the pump wire should protrude approximately one millimeter (plus/minus 0.2 mm).

Operation in difficult conditions

The optimal thickness of the gasket between the cylinder block and the heat insulation element is 0.3 millimeters (an error of no more than 0.03 mm is also allowed. The seal located between the heat insulation attachment and the pump itself is selected individually. Most often, this element is made by the hands of a car enthusiast.

As it turned out, replacing an element of one of the most important vehicle systems turned out to be quite affordable

The fuel pump is an important part of the engine fuel supply system

Given the importance of this component of the vehicle system, it is worth paying due attention to its maintenance. In most cases, the cause of fuel compressor failure is the use of a low quality fuel mixture. The presence of abrasive particles in gasoline leads to premature wear of the pump and other elements of the fuel system

The presence of abrasive particles in gasoline leads to premature wear of the pump and other elements of the fuel system

To increase the service life of the pump and other elements of the fuel system, it is worth regularly checking the condition of the fuel filter and replacing it in a timely manner

The presence of abrasive particles in gasoline leads to premature wear of the pump and other elements of the fuel system. To increase the service life of the pump and other elements of the fuel system, it is worth regularly checking the condition of the fuel filter and replacing it in a timely manner.

There are several types of additives designed to clean and prevent the fuel line, which can be used if the system is severely clogged.

Along with installing a new fuel pump, it is best to install a new filter element. In this way, premature wear of the element can be avoided.

The VAZ 2106 fuel pump is very picky about the quality of gasoline. Of course, the car will operate on low-quality fuel, but in order to avoid unexpected costs for car repairs and maintenance, we recommend filling up with gasoline at trusted gas stations.

https://youtube.com/watch?v=biMh-yL8gx0%3F

Good luck on the road!

Fuel pump characteristics

The fuel pump module has its own individual designation, which is the order number 21073.1139. The device has the following characteristics:

The rated voltage at which it provides normal operating pressure is sufficient for stable operation of the engine - 13V.
The maximum permissible voltage should not exceed 13.5 V.
The maximum productivity at a supply voltage of 13.5 V is 3 kg/cm2, which is equivalent to 60 l/hour.
The rated operating current of the device is 6.5A under normal operating conditions.

Malfunctions and repairs

Since the fuel pump module is a part that works constantly, providing a given level of pressure in the fuel line, it is very susceptible to various malfunctions. Therefore, we can highlight the most common breakdowns that require replacing the module assembly or a separate pump:

No pressure in the system is the most common problem that is associated with problems with the pump. This indicates that the roller mechanism has worked, there are scuff marks on it, a backlash has formed and the gasoline is being bleed back out. That is, in fact, the motor turns idle. Cannot be repaired; replacement is required.

Break in windings or brushes . Despite the fact that it is immersed in fuel, the engine is equipped with a brush device that wears out over time. By this point, the pump unit usually wears out, so replacing it with a new one solves everything.

Klin . Often the device jams for the same reason - clogging with large particles that have penetrated through a torn or homemade mesh. The filter is removable, so it is recommended to change it more often.

The entire pump module is replaced in the assembly if the fuel level, which is implemented using a resistive plate and a sliding contact, does not work.

You can buy an original pump for VAZ 21073 with delivery and warranty in our online store. Make a purchase using the form or call us by phone.

Theory

The fuel pump, mechanically driven by the camshaft (or by changing the pressure in the push-pull crank chamber), moves a lever connected to the pump diaphragm. The diaphragm, moving down, sucks fuel from the tank through the valve, after which the spring returns the diaphragm to its original position, as a result of which the sucked fuel is pushed through the second valve into the carburetor.

Thus, the suction stroke of the pump is determined by the movement of the lever driven by the cam, while the discharge stroke is determined by the spring compressed during suction. These types of pumps are also equipped with a lever for manual pumping, for example after a long stop and fuel has leaked from the pump. To avoid having to crank the starter for a long time, simply use the lever and prime the carburetor float chamber by hand.

Typically, the fuel pump sump is equipped with a simple fuel filter - a dense mesh built into the top of the suction channel. The gasoline, before it enters the valve, is in a sump and only when it reaches the overflow level does it enter the suction valve channel. This pump design allows thicker impurities to settle at the bottom of the sump, and smaller ones to settle on the pump filter. However, this type of filter is often insufficient, so it is worth installing a flow-through filter on the hose and forget about problems with dirty fuel.

The second option differs in that the unregulated pressure control valve remains in the open position, which causes the pump chamber to become leaky; in order for the controller to start the pumping process, it must close the valve by controlling it.

Only when the chamber is sealed does the pressure increase due to the decrease in chamber volume. Fuel will flow to the high pressure side when the exhaust valve opens, and this occurs when the pressure in the chamber is higher than the main pressure. When during the pressing phase we reach the appropriate pressure in the main line, the controller turns off the flow control valve, which causes the chamber to unseal and thus ends the pressing process and the fuel from the chamber flows to the low pressure side.

The pressure then drops and the outlet valve closes due to the pressure difference. This concept also allows only the required amount of fuel to be compressed, although from the control side it is clear that the opposite is true. This concept is also rectangular in shape, and its frequency is equal to the stroke frequency of the piston, and a decrease in duty cycle under conditions of increasing rotation speed does not necessarily mean a decrease in pump flow, since the piston travels the same path, albeit in a shorter time.

Causes

There are several reasons why a VAZ fuel pump may not work:

no power to the fuel pump;
motor is faulty;
pump is faulty.

Let me clarify some points. If the electric motor malfunctions, power is supplied to it, but if the brushes are broken, the rotor or windings are faulty, the motor will not spin and you will not hear a characteristic hum.

If the fuel pump malfunctions, a hum will be heard, but there will not be enough fuel or, in my case, the pump is simply jammed.

Purpose and principle of operation of the fuel pump

The fuel pump is designed to pump fuel from one point to another. In a car, the role of the first point is played by a fuel reservoir - the tank, and the second - by the engine, where the pumping takes place. This process occurs at a certain pressure, which is maintained by the pump reducer, which is a very important point.

Fuel pumps are divided into 2 types according to the type of drive: electric and mechanical. Inside the first there is an electric motor with a mini-pump, which operates from the mains and uninterruptedly pumps fuel into the engine. The second type is becoming increasingly rare, as it is installed on carburetor cars, and operates due to the reciprocating movement of the lever.

Diagnostics

The very first thing when diagnosing, as noted above, listen when you turn on the ignition to see if there is any noise from the fuel pump. The absence of a characteristic buzzing may indicate that:

VAZ 2107 fuel pump fuse is faulty;
relay malfunction;
open circuit of the fuel pump;
motor malfunction;
ECU malfunction.

Below is a simplified connection diagram for a VAZ 2107 injector fuel pump:

You can check the fuel pump on a VAZ 2107 injector simply by checking the voltage at its connection block with a tester. The presence of voltage will indicate a malfunction of the electric motor. Instead of a tester (multimeter), you can use a test lamp to diagnose a malfunction.

In the absence of one, this can be done by disconnecting the connection block for the fuel pump and fuel level control and applying voltage with wires from the battery to the place where the gray wire is connected +12 and to the place where the black wire is connected - minus. A humming pump will indicate a faulty fuse, power circuit or ECU.