On any passenger car with gasoline motor, the fuel pump is designed to supply a fuel under pressure from a gas tank into a dosing device - depending on the modification of the engine on the VAZ vehicles, the fuel system is injector or carburetor.

Where is the fuel pump on the VAZ 2110

On VAZ 2110, the fuel pump can be electric or mechanical. Its view depends on the type of fuel system, which is installed on the engine. BN (gas station) on the carburetor engine "Dozens" is behind the valve cover, near the distributor interrupter, and on cars with an injection engine it is located in the fuel tank. If the fuel pump begins to fail, the engine does not develop the turnover and does not pull, and sometimes the power unit does not start at all.

Scheme of gas station VAZ 2110

The device of the electrical junction 2110 is quite simple - the node is an electric motor to which the power of 12 V. The benzone pump is installed in the housing, and the mesh is mounted at its input, that is, a coarse filter. Thanks to the filtering element, the dirt particles do not penetrate into the pump housing, which protects the device from clogging.

In the electrical circuit BN VAZ include such elements:

• Motor control unit.
• Ignition.
• Wiring.
• Relay.
• Fuse.

On the VAZ 2110, which were produced until 2000, mechanical benzonasos were installed.

It consists of such a BN from the following parts:

• Metal case.
• Return spring.
• Top cover.
• Two valves.
• Pusher with a diaphragm.

The fuel injection from the gas tank is performed due to the fluctuations of the diaphragm, the opening and closing of the valves. The diaphragm with the pusher is driven from the camshaft eccentric, on the lower body of the fuel pump there is a lever of a manual fuel swap.

Power supply gas station VAZ 2110

During the turn of the ignition key on the gas station terminals through the relay, power is supplied, and BN begins to swing fuel. When the fuel line input highway is filled with gasoline, the ECU through the relay gives the command to turn off the voltage - the fuel system is fully ready for the launch of the engine, it remains only to scroll through the engine starter.

VAZ 2110 does not pump fuel pumps, reasons

First, consider the malfunction of the mechanical BN. All elements of car engine are susceptible to aging and wear, simply under the influence of the time the resource has a mechanical benzonasos.

The main malfunctions of the mechanical device include:

• Valve breaks.
• Diaphragm cracking.
• Corproofing enclosures.

When the air pump is passed through the air diaphragm, it can stop pumping fuel into the carburetor, also through a torn membrane, gasoline falls into the crankcase where the motor oil is mixed. When fuel gets into oil, fuel consumption increases sharply, and the motor itself begins to start badly, especially if he is heated. Check for fuel in the crankcase is quite simple - if you set fire to the oil dipstick lighter, it will be fire. In addition, from the oil crankcase will smell fuel.

A frequent defect arising in mechanical fuel pumps is the surface of the surface at the point of attachment of the BN to the housing of the auxiliary devices. When surface deformation, the engine oil begins to leak into the junction between the planes.

Now, as for the electric junction.

If it stopped functioning, there may be several reasons for the breakdown:

• Burled the motor of the fuel pump.
• Relay stopped working.
• Fuse burned.
• Wiring is damaged.
• The failure of the motor control unit.

How to check the gas station VAZ 2110

When the driver on an injection engine car includes ignition, the electric motor begins to function - with the specific buzz. If no sounds are noted, then the fuel pump does not pump fuel.

Another characteristic breakdown of the electric junction - the fuel injection is performed, but the functioning is accompanied by a strong noise. If the fuel pump is noise - this is a clear sign that this device will not "live" for a long time, and soon fails.

Where are the relay and fuse of the gas station

In any power switch, the relay is intended for opening and closing the chain, its main role is to protect the elements of the electrical circuit from high starting current. During the start of the engine, the current that is needed to scroll through the starter is 80-300 amps, and if the relay is not installed, any component of the electrical circuit may suffer.

On the "dozens" of the relay of the fuel pump, the electromagnetic coil and the core is located in the plastic housing, when the voltage is applied, due to the electromagnetic field, contacts are closed. On the VAZ 2110 the relay is four-contact and designed for a current of 30 amps.

The fuel pump relay on the "dozen" (injector) is located in the cabin of the car, under the dashboard, near the central console. After dismantling the protective plastic casing, of the three elements located here, the relay that is responsible for the operation of the fuel pump will be in the center (in fig. At number 5). The fuse of the gas station is to the left of the relay.

How to replace the fuse of the fuel pump

To replace the fuse of the fuel pump, unscrew the two screws of the protective casing and dismantle it. Next, remove the fuse and check its condition, and at the same time the integrity of the contacts in which the fuse is located. If he overwhelmed, install a new one. Quite often, it happens that the fuse braves immediately after replacing. The main reasons for such a phenomenon:

• Circuit in electrical wiring.
• "Korotit" itself fuel pump.

How to check and replace the fuel pump relay

If the electrical displacement during the inclusion of ignition does not submit signs of life, it does not mean that it burned. The cause of the breakdown may also be a "relyushka". The simplest method of checking the fuel pump relay on the rumor - during the inclusion of ignition, it should click. If the click does not hear, then most likely, the relay is faulty.

However, everything is not so simple - the breakdown may be "cunning", for example, the machine does not start the first time. The cause of the breakdown can be burnt relay contacts.

In this case, check the performance of the pump is very simple:

1. Remove the protective casing that hides the block with fuses and relays.
2. Unscrew the fastening of the pads and remove it, it will stay on the wires.
   
3. Switch out the relay from the pad and put the jumper between 2 opposite contacts, so we will feed the power directly to the fuel pump.
   
4. If the electric motor of the fuel pump with this connection begins to make noise, then it is most likely a fuel pump itself, and the malfunction lies in the relay. In this case, replace the relay.

Filters coarse and fine fuel purification: where are when and how to change

Russian gasoline does not always meet the quality requirements, so over time, precipitate accumulates in the fuel tank. The dirt also scores the grid of the electric junction, as a result of the accumulated dirt, the fuel does not fully fall into the fuel line, and interruptions appear in the engine function. To eliminate the fault, you need to replace or clean the coarse filter. However, to get to the mesh, it is necessary to remove the fuel pump.

Before disassembling the fuel system, it is necessary to reduce the pressure, otherwise the fuel can pour the entire interior of the vehicle during the disruptiveness of the fuel line fittings. For pressure boom, remove the fuse of the fuel pump, start the engine and wait until it stalls. Replacing the gas-pump mesh on the "top ten" (injector) is done in this way:

1. Turn off the ignition.
2. In the cabin in the backseat, find the loops and pull for them to fold the lower seats forward (right and left).
3. Under the seat on the bottom is the hatch, it is attached on two self-drawing.
   
4. Unscrew the screws and dismantle the hatch.
   
5. Disconnect the plug with wires by which the power supply is powered by the electrical space, for which you remove the retainer and take the part of the connector from each other.
   
6. Unscrew the fuel tubes fittings - the main feed and "returns" (key 17 mm).
   
7. Unscrew the nuts of the pressure plate of the fuel pump, here 8 fasteners (7 mm key).
   
8. Since the nuts are small, it is better to fold them into some kind of bank, otherwise you can lose them. Remove the plate and remove the pump from the fuel tank assembly. The pump must be removed with the sealing ring, lift the pump gently, in order to avoid damage to the fuel level sensor. During the extraction of the case, you need to tilt the gas station so that it leaves the tank.
9. Remove the grid from the fuel pump and install the new item.
10. Install the fuel pump in place.

No food on fuel pump 2110, how to check and eliminate

The wiring goes to the BN in the amount of three wires: the fuel level indicator, negative and positive. The reason that the fuel pump does not pump, there may be an elementary lack of power. To check the power to the fuel pump, it is necessary to take a 12 volt lamp and attach its wires to negative and positive contacts on the external BN connector. When you turn the ignition key, the check light should turn around. If this did not happen, then the problem is in external circuits. To do this, alternately connect negative and positive contacts, dismantled from the BN connector, to the mass of the fuel pump, and then to the relay.

If negative contact is on the mass, the ignition is turned on and the lamp blinked, it means that the contact of the non-working, the lamp did not blink, then non-working positive contact. If the relay contact and the lamp fell down, then the wiring is damaged on the site from the BN to the relay.

Burnt fuel pump motor burned, how to check and replace

Another reason for the release of a fuel pump could be a vents of a motor - a key element chasing fuel. Its performance is checked by the same light bulb: Attach its wires to any terminal of the motor and scroll the ignition. If the light bulb blinked, the motor can be thrown out.

Tips Prof.

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