It's no secret that you can't get far in a car without gasoline. Therefore, for the engine to operate, it is simply necessary that the entire fuel system functions in optimal mode.
In many ways, the fuel pump is responsible for supplying fuel to the engine, which the VAZ 2114 model is not without, of course. To solve a problem with a faulty fuel pump, you need to make sure it is at fault.
Removing, installing and replacing the fuel pump
The first thing to keep in mind is that all work on the car’s fuel system must be carried out with the negative terminal of the battery disconnected. It would also be a good idea to do this with an empty fuel tank, especially since with the fuel module removed it becomes possible to clean the bottom of the gas tank from sediment.
The second thing it is advisable to do is to remove the pressure inside the fuel lines so as not to get a stream of gasoline in your face or into the interior of the car. This can be done using a measuring nipple on the fuel rail and a thin screwdriver.
To work you should prepare:
- curved and flat screwdrivers
- key for 17
- head for 7
- rags
Sequence of work
- Raise the rear sofa.
- We unscrew the two screws that hold the cover that blocks access to the fuel module, and disconnect the electrical connector from it.
- Using a 17mm wrench, unscrew the two fuel lines connected to the pump, being careful not to lose the O-rings, and move them to the sides.
- Newer models have clips on the pump; to remove them, press them and pull the tubes towards you.
- Using a 10mm socket, unscrew the 8 nuts that secure the pressure plate in a circle, holding the entire fuel module.
- Carefully remove it through the hole in the gas tank, having first released the fuel level sensor float.
If there is a new assembled module in stock, install it in the reverse order. If it is necessary to replace individual components: the fuel pump itself, the level sensor or the primary filter mesh, we do this by disassembling the fuel module housing and removing the corresponding parts.
This procedure is unlikely to cause any difficulties - everything is quite obvious.
For a new type of fuel pump, you need a 10mm socket and a ratchet, similarly unscrew the ring in a circle and press out the fuel line clamps.
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Electric fuel pump module VAZ 2110, 2114, 2170 “SAN-D”
Description:
Applicability:
| Basic | |
| Manufacturer | san-d |
| Manufacturer country | Russia |
| Spare part code | 21101-1139009 |
| State | New |
| User characteristics | |
| Brand | Lada |
| Model | VAZ |
| Compatibility | 2110 |
| Part type | Gasoline pump |
| Type of equipment | VAZ |
| Day | Working hours | Break |
| Monday | 10:00 — 17:00 | |
| Tuesday | 10:00 — 17:00 | |
| Wednesday | 10:00 — 17:00 | |
| Thursday | 10:00 — 17:00 | |
| Friday | 10:00 — 17:00 | |
| Saturday | Day off | |
| Sunday | Day off |
* Time specified for the region: Russia, Tolyatti
Return and exchange conditions
The company returns and exchanges this product in accordance with legal requirements.
Return deadlines
Returns are possible within 7 days after receipt (for goods of good quality).
Return delivery of goods is carried out by agreement.
According to current legislation, you can return a product of good quality or exchange it if:
- the product has not been used and has no signs of consumer use: scratches, chips, abrasions, stains, etc.;
- the product is fully assembled and in its original packaging;
- all labels and factory markings are preserved;
- the product retains its presentation and its consumer properties.
Source
Models of fuel pumps for VAZ 2114/2115 cars
VAZ 2114/2115 cars are equipped with 1.5 cm3 and 1.6 cm3 gasoline engines with a distributed injection system. A submersible electric fuel pump is used to supply fuel. It is part of the fuel module installed at the top of the gas tank (under the rear seat). In addition to the pump, the module includes a fuel accumulator (cup), a coarse filter and a fuel level sensor with a float.
To supply fuel in VAZ 2114/2115 cars, a submersible electric fuel pump is used
The VAZ 2114/2115 fuel pump is a conventional DC electric motor in a sealed housing with a one-way valve at the outlet. An impeller of a special shape is located on the electric motor shaft. Its rotation ensures the fuel supply.
The fuel module includes a fuel pump, a fuel accumulator, a coarse filter and a fuel level sensor
The fuel pump is powered from the vehicle's on-board network. The electrical circuit of the pump, protected by a fuse, is closed using a separate relay.
Electric fuel pumps for VAZ cars are produced by both domestic (Utes, SAAZ, Pekar) and foreign companies. The latest modifications of the VAZ 2114/2115 are equipped with BOSH pumps, which are distinguished by their high reliability, long service life and relatively low price.
Design of the electric fuel pump VAZ 2114/2115
Catalog numbers of standard fuel pumps for VAZ 2114/2115:
- 2112–1139009–12 — for engines with a volume of 1.5 cm3;
- 2112–1139009–01 — for engines with a volume of 1.6 cm3;
- 580453453 (BOSH) - for engines with a volume of 1.5 and 1.6 cm3.
These models differ in operating pressure. The former are capable of creating a pressure of 2.8–3.2 kPa in the fuel system, the latter - 3.7–3.9 kPa. BOSH fuel pumps are rated at 3.5 kPa.
Fuse
This is the final stage of diagnosis.
For those who do not know where the VAZ-2114 fuel pump fuse is located, it is located in the same place as the relay. You can see it from the salon. The best way to get to it is through the hood.
So, under the hood, near the windshield, there is a box. You need to open it and find the top fuse. Its current strength is 15 A. It is also written on it that it is for the fuel rail. If the fuse contact is intact, it means it is alive. If the contact is not OK, the fuse must be replaced.
These are the typical faults this unit has, and in the manner described above you can diagnose it.
Signs of breakdown
There are several situations in which the pump or its components can be at fault. This will definitely have to be checked. Otherwise, you can spend a lot of money buying and installing a new fuel pump, but in the end it turns out that the problem is completely different.
- The engine will not start. This is not a clear sign of problems with the pump, but still. Therefore, first check the condition of the spark plugs, the presence of a spark, and the absence of traces of oil on them. Also check the electronic control unit.
- Pressure inside the fuel system. If the pump is operating normally, it will create a pressure of 3.2 bar. Depending on the type of engine in your VAZ 2114, the characteristics may differ slightly: For a 1.5-liter engine, the optimal values are 285-325 kPa;
- For a 1.6-liter engine, these characteristics in optimal operating mode will range from 375 to 390 kPa.
New and old coarse filter
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Many people purchase the entire fuel module assembly at once, which includes a filter, sensor, float, intake chamber and the pump itself. Such a purchase will cost approximately 3,000 rubles. It is much more profitable and practical to buy a separate pump, which costs up to 1000 rubles. This is due to the fact that when the pump fails, the remaining elements almost always remain intact and are fully suitable for further use.
Checking the power supply on the chip
If no problems are found in the fuse and relay block, then you need to move on. In general, most electricians start checking the power supply to the fuel pump from here - from the gas tank hatch.
To do this, we lift the seat, move the backing, and under it we find the gas tank hatch. Having unscrewed two screws, we open it. It contains three terminals, two of which are positive (black and gray), and the third goes to ground. Both wires are checked one by one, connecting the ends of the test lamp wires with one end to positive and the other to minus (ground). We check the presence of power at the terminals with a test lamp. If the light is on, but the pump still does not pump, use a tester to check the voltage in the network. In order for the EBN to start, the voltage must be at least 10V. If it turns out that the voltage is lower and you are sure that the battery is sufficiently charged, inspect the condition of the connectors to see if they are acidified. Low voltage can also occur if there is a break in the wiring. Now that we have checked the entire electrical circuit and made sure that it is in order, that the wires are intact, the relay is working, the fuse has been replaced for prevention, the cause of the problem should be looked for in the pump itself. Next, you will learn how to check the operation of the fuel pump on a VAZ 2114 by measuring its pressure.
What is a fuel pump and why is it needed?
Fuel pump diagram
The gasoline pump serves to ensure continuous and uninterrupted fuel supply to the engine during operation. In most modern car models, it is located inside the gas tank, so access to it is not so obvious and can be difficult.
In VAZ cars, under the rear seat you can find a rectangular hatch, under which you can access the fuel pump. The fuel module kit also includes: a fuel level sensor with a float and a coarse filter - mesh. Two fuel lines are connected to the fuel pump:
feeder, from which the fuel rail with injectors is fed through a fine filter;
reverse, returning fuel through a pressure regulator, ensuring its constancy in the engine power system.
Checking fuel pressure
Gasoline pressure in the fuel system is a significant parameter that affects the operation of the internal combustion engine. This indicator will allow you to check the fuel pump on the VAZ 2114 injector for stability. If the pressure is low, there will be no high-quality injection of the fuel-air mixture. At elevated pressure, fuel can flood the spark plugs and engine compartment, in the latter case a fire may occur. Fuel pressure is checked with a special device - a pressure gauge.
Before measuring pressure, you must do the following:
- Turn off the internal combustion engine;
- Unscrew the cap on the ramp and relieve the pressure inside it by slightly opening the valve with a screwdriver;
- Using a special valve cap, unscrew the spool with the valve;
- Secure the pressure gauge fitting to the fuel rail.
Now that all the preparatory operations have been completed, you can start the engine and measure the pressure in the ramp. Don't forget to have a rag ready in case the fuel splashes a little. This sometimes happens with high blood pressure. During normal operation of the fuel pump, the pressure should be 3 atm at the start, and during engine operation and at idle, the pressure decreases and settles to 2.5 atmospheres.
Selecting and replacing the fuel pump
Russian car owners prefer BOSH fuel pumps. You should only buy a new pump in specialized stores. The original product must be packaged in thick plastic film filled with special preservative oil. At the same time, a branded BOSH pump cannot cost less than 2 thousand rubles.
To replace the electric fuel pump on a VAZ 2114/2115 you will need:
- screwdriver with Phillips bit;
- thin slotted screwdriver;
- key or head 7;
- key to 10;
- key to 17.
The sequence of actions is as follows:
- Using a 10mm wrench, remove the negative terminal from the battery.
- Open the gas tank cap to reduce the pressure in it.
- Remove the rear seat cushion and peel back the carpet and sound insulation.
The fuel module hatch is located under the rear seat
- Using a screwdriver, unscrew the two screws securing the fuel module hatch and remove it.
- Disconnect the power connector.
Disconnecting the electrical connector from the fuel module
- Using a 17mm wrench, unscrew the nuts on the fuel pipes. We disconnect the tubes from the fittings and move them apart.
Using a 17 wrench, unscrew the nuts on the fuel pipes
- Using a 7 socket, unscrew the eight nuts securing the fuel module cover.
Using a socket 7, unscrew the eight nuts securing the module cover
- Remove the pressure ring and remove the fuel module.
Removing the fuel module from the gas tank
- Use a thin slotted screwdriver to disconnect the coarse fuel filter.
- Using the same screwdriver, remove the retaining rings on the glass guides.
Using a screwdriver, remove the retaining rings from the guides
- Disconnect the fuel pipes from the cap fittings.
Fuel pipes will be easier to disconnect if they are heated
- Disconnect the electrical connector.
- Remove the glass from the guides.
After disconnecting the tubes and wires, remove the glass from the guides
- Using a slotted screwdriver, move the latches securing the electric fuel pump to the sides and remove it.
To remove the fuel pump, you need to move the latches apart
- Install a new pump.
- Repeat all operations in reverse order.
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If, when disassembling the fuel module, it is discovered that the coarse filter is clogged, it should be replaced. The fuel level sensor with a float must also be replaced if the readings on the front panel do not correspond to reality.
Thus, diagnosing and replacing the fuel pump of a VAZ 2114/2115 car is quite simple. And in order for the pump to serve for a long time, always refuel only with high-quality gasoline.
Necessary tool
What to do if the pump fails? To dismantle old and install new equipment, you need to prepare the following tools:
- Phillips and flat screwdriver;
- socket wrench 7;
- open-end wrenches sizes 10 and 17.
Before replacing the fuel pump on a VAZ 2114, you need to make sure that it is the problem. To do this you need to do the following:
If when you turn the ignition key you do not hear the noise of the running motor, then use a multimeter to check the power circuit. To do this, remove the fuses from the mounting block (located under the glove compartment) and measure them.
And also “mass”. To do this, remove the lining near the handbrake lever. We find the “minus” of the fuel pump (attached to the car body). Disconnect, clean and put back. And lastly, we check the presence of power directly to the fuel module. It is necessary to dismantle it (located under the rear seat) and connect it directly from the battery.
We check the pressure in the system.
Under the hood of the car we find a special fitting with a cap. We remove it, put a hose on it, and the other end to the pressure gauge. Moreover, both ends must be tightened with clamps. Turn on the ignition and record the instrument readings.
The pressure should be between 2.8 and 3.9 kPa.
If there is no positive result, the fuel pump is replaced with a new one. Let's look at how to replace the fuel pump on a VAZ 2114. We proceed in the following sequence:
- Disconnect the terminals from the battery. Let's use a 10mm wrench to remove the negative terminal of the battery.
- To reduce the pressure in the system, unscrew the fuel tank cap.
- Raise the back seat.
- We unscrew the latches (screws) of the hatch and move it to the side.
- Then disconnect the power supply to the module.
- Using a 17 wrench, unscrew the fuel line. If your car is a new year of manufacture, then instead of a threaded connection you will have plastic latches that you just need to press and disconnect the fuel hoses.
- Next, remove the module cover by unscrewing 8 nuts.
- You need to pry off the special ring that holds the fuel module, after which we remove the module.
- Using a flat screwdriver, remove the coarse filter, as well as the retaining rings on the glass.
- Then remove the fuel pipes and electrical connector. We take out the glass.
- We take out the fuel pump.
- We put a new part in its place and perform all assembly steps in reverse order.
Advice . If a clogged coarse filter or a faulty sensor is detected, all parts are replaced with new ones.
