Buying a fourteenth fret is a young thing that does not require a large budget, both for the car itself and for spare parts. If you compare the VAZ 2114 with any foreign car of the same class, you will get a decent price difference in favor of the Lada. And even if a foreign car costs more, and servicing it is not more expensive than a Lada, then spare parts from the Russian automobile industry will be much easier to find in any of the most remote areas of our country. Whatever you say, any car wears out and requires attention and care. So let's talk about a common problem with the fourteenth - the fuel pump does not pump.
Gasoline pump VAZ 2114
Situation
You're driving, and suddenly you stall. You start it, the engine growls, the starter turns, it starts moving and again there is a stupor. Or the ignition does not respond at all, you have to push it to start. This also includes the case when the engine responds every once in a while if you slow down for a couple of minutes and go to nitral. The battery is ok. We're sinning at the fuel pump.
Symptoms of a problem
- The first sign indicating a breakdown of the fuel pump will be a banal refusal of the engine to start. Of course, such an indicator as an unstarted car is very general. In this case, it is worth checking the spark plugs, which may become oily and not produce a spark and the ECU.
- The second point is the pressure of the fuel system. If the fuel pump is OK, it creates a pressure of 3.2 bar. The fuel rail is characterized by the following indicators:
- for a volume of 1.5 l – from 285 to 325 kPa,
- for a volume of 1.6 l - from 375 to 390 kPa.
- A very common problem is when the signal does not reach the fuel pump after ignition. When you turn the key, you usually hear a slight vibration from the fuel pump, but here it doesn’t happen. Most likely the wiring has failed. We'll have to call her and figure out what's what.
- The engine is tripping. Like reason number one, this indicator is not a benchmark. It is believed that the signs of a malfunction of the VAZ 2114 fuel pump are represented by other obvious causes of malfunctions. However, if the fuel pump is not working properly, the engine begins to jerk (which is natural, fuel combustion in the cylinders occurs incorrectly), and operate intermittently out of the blue.
- The engine may jerk even before starting or at low speeds. This reason is closer to the truth: either the fuel pump or its mesh – a low-purity filter – is not working.
The fuel module, which includes the pump itself, is expensive - from 2,000 to 3,000 rubles. The inept owners of the fourteenth buy it entirely (together with the filter, fuel level sensor, float and intake chamber) and install it to replace the deceased. In fact, the price of a VAZ 2114 fuel pump is only 700-1000 rubles, you only need to take and install it, the rest of the module almost always remains intact.
Just don’t immediately run to the spare parts store and buy a new one! There are plenty of reasons for the breakdown, including those that may lie in the power system. Here are the main ones:
- Fuel pump fuse VAZ 2114
- Fuel pump relay VAZ 2114
- Poorly secured mass of the VAZ 2114 fuel pump
- Fuel pump motor VAZ 2114
- Contacts of the fuel pump system VAZ 2114
- The fuel pump itself
All these spare parts can break and stop the normal operation of the fuel module system. In fact, the fuel pump is the part of the fuel system that passes gasoline under pressure. The mechanism is complicated, we will understand it step by step.
Advantages of injection models
The main function of the pump is to supply fuel to the combustion chamber. It must meet certain requirements. The main criterion is pressure.
The pumps for injection and carburetor engines are different. Thanks to the engine with direct fuel injection, there is no need for preliminary preparation of the combustible mixture. As you know, the carburetor is the weak link. Difficult adjustments, clogged jets, difficult starting in cold weather create inconvenience for owners of classic VAZ brands.
Tens and VAZ-2112 internal combustion engines have significant advantages. Let us note the advantages of injection units:
Unfortunately, the injector has a number of disadvantages. Maintenance and repairs have to be carried out at a service station. It also requires qualified personnel and a computer to determine the malfunction of electronic components. Let us point out other disadvantages:
Pressure system
The gasoline pump creates pressure in the fuel rail for normal gasoline supply functionality. Let's measure the pressure and we'll understand a lot right away.
Normal parameters of atmospheres in the system are as follows:
- Idle – 2.5
- Ignition – from 3
- Without pressure regulator tube – 3.3
- With pinched drain – 7
- We press on the gas - from 3 to 2.5.
We will measure in these five states with a pressure gauge with a small range of atmospheres (up to 7, to reduce the error to a minimum). Under the hood we found a pressure fitting (just unscrew the cap in advance), attached a pressure gauge (hose) to the fitting and off we went. The ignition is turned on, the pressure gauge is zero: the fuel pressure regulator is broken. We press on the gas, the pressure gauge goes to zero: the fuel pump itself is broken (now you can do some shopping at a spare parts store). There may still be a situation. When the pressure gauge needle lazily rises, look at the condition of the fuel filter.
By the way, if you don’t have a pressure gauge, it’s sad and sad, because it’s an expensive pleasure. Similar diagnostics in the service will cost half as much.
The fuel pump and its role in the fuel system of the VAZ 2110
In the “ten”, as in other cars where power plants for fuel are installed, the gas pump serves as an element that pumps fuel in the “fuel tank-motor” circuit. It supplies gasoline to the metering component, the function of which, depending on the design of the fuel complex, is played by either a carburetor or an injector in the injection engine system.
In cars of different types of fuel supply, an electric fuel injector pump is used, 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.
To buy VAZ 2110 fuel pumps, the price of which is affordable for most of our car enthusiasts, should be factory-made. Of course, this part for an injection engine is structurally more complex and costs more, but the price limits are very reasonable and acceptable within their limits. In addition, the fuel injector pump, the price of which is higher than its analogue on a carburetor engine, is technologically more complex and has a number of significant advantages.
Wiring contacts
The wiring system goes to the fuel pump in the number of three wires: positive, negative and gasoline level indicator. The cause of a fuel pump failure may be a simple power failure in the wiring. If everything is normal with the pressure, then we check the contacts.
We take a simple 12 V light bulb and attach its wires to the positive and negative contacts on the external connector of the fuel pump, respectively. We turn the ignition: the light blinks, there is contact. Then you need to dig deeper - look at internal contacts.
An external problem with the wiring if the light does not light up: alternately connect the positive and negative contacts removed from the fuel pump connector to the ground of the fuel pump, and then to the snout. Negative contact on ground, turn on the ignition, the light blinks - the contact is not working, the light does not blink - the positive contact is not working. When the contact is on the snout and the light comes on, the wire is damaged in the area from the fuel pump to the snout.
Motor
Fuel pump motor VAZ 2114
We checked the pressure and wiring, everything works like clockwork, but the engine stalls. The fuel pump may not pump due to a breakdown of the motor - the main element that drives fuel. We check its functionality with the same light bulb: attach its wires to any terminal of the motor, turn the ignition. The lamp blinked - it was time to throw out the motor. And again, run to the store for a brand new motor.
The terminals may oxidize and not make contact, as a result of which the fuel pump will not pump. The motor in this case may be normal. And the terminals just need cleaning (possibly re-soldering). There is an opinion that the terminals are oxidized due to low-quality fuel (the octane number does not match the declared one).
Fuel pump weight
The contact system is normal, but the gasoline level sensor is acting up. Let's see what happens to the mass of the fuel pump. It may be poorly secured. In this case, the fuel pump will not be able to pump anything.
The mass of the fuel pump itself is attached to it in the area of the handbrake, under the dashboard. When you pull the handbrake, you can touch the ground contacts of the fuel pump, and the connection may be lost.
It is not difficult to tighten the mass of the fuel pump, it is difficult to reach it. Namely: get the grounding contact of the ground conducting the lost connection. We remove the plastic under the handbrake and the floor covering of the car, respectively; We clean the contact and firmly attach the mass to the fuel pump.
Removing the pumping unit
Before starting work, you must disconnect the terminal from the battery. This will prevent damage to electrical equipment. In addition, replacing the fuel pump may cause a fire.
Let's prepare tools and materials. To remove the VAZ-2110 fuel pump, you need the following:
The device itself is located under the rear seat cushion. To get to the installation location of the fuel pump 2110, you need to remove the seat. Under the casing we find a hatch. We unscrew the hatch. Disconnect the electrical drive connector.
Using an open-end wrench, unscrew the tips of the fuel pipes. We pull off the pipes. Using a spanner, unscrew the 8 nuts around the perimeter of the clamping ring. Release the flange.
There is a gasket under the pressure ring of the fuel pump 2110. The gasket is removed. It is better to change worn tires.
Then we raise the VAZ fuel pump together with the float. Gasoline will leak from the body. To avoid staining the interior, place a rag. There will be up to 1 liter of gasoline left in the old building. Drain it into the tank.
Assembly is carried out in reverse order. There is an arrow on the top of the cover. It should point towards the trunk. This is the correct pump position.
When replacing, do not forget to remove the float and level sensor.
These spare parts are installed on the new structure.
All operations, including preparation, will take less than an hour. After replacement, perform a test. Start the engine. Finally, you should check the fuel pump, make sure the connections are tight and there are no leaks.
Relay
Relay
In the same place as the fixed mass of the fuel pump, under the dashboard, its relay is located.
Ideally, when ignited, the relay creates the required pressure in the system in a couple of moments and turns off. If this does not happen, the pressure is normal, but the process does not proceed, we completely lift the front facing panel that covers the contacts of the music and air conditioner and look from the passenger side: there are three switches, the lowest one is from the fuel pump. When you turn the key, the relay makes a characteristic click and works. If there is no click, the relay or its contacts are closed.
As they say, there is no need to waste time on trifles, if the motor terminals can be reanimated, then it is better to replace the relay and its contacts. The pleasure is inexpensive, the location for replacing spare parts is very convenient.
Why does the fuel pump on the VAZ-2110 8 valves not work?
If the fuel pump does not work when you turn on the ignition, the cause may be:
- fuel pump relay
- fuel pump fuse
- the fuel pump itself
- wiring
- alarm (its blocking)
Let's talk about this now.
Fuse
Fuse 15 A
One of the final stages of checking a malfunctioning fuel pump is its fuse. Like the relay, the fuse can be seen from the inside. Or you can climb in from the outside, through the hood. Under the hood, closer to the windshield, there will be a dark box, right on the electronic control unit. You need to open it and find the topmost fuse with a current of 15 A and the English inscription fuel pump. We take it out and look at the insides: the contact is not damaged - the fuse is alive. The contact is damaged (blown) - you need to install a new fuse. As with the price of the relay issue, buying and replacing a fuse will not be a big waste of money and time.
Not every master's hands grow from the right place. For this reason. The reason that the fuel pump does not pump can be simple stupid shortcomings of simple tuning.
For example, the alarm was installed in such a way that all the contacts were mixed up, and power simply does not go to the fuel pump. Not because the alarm should not be on the car, or the wiring system is acting up, it’s just that the person who installed it didn’t have enough brains and practice. Check all connections carefully if you decide to add some style to your little one.
Or anti-theft. The button is placed in such a way that it interrupts the integrity of the fuel pump ground contact system, and almost always fails. By the way, if you have such a lotion, I don’t think it will be very effective in the absence of a signal. And if there is a signaling system, then anti-theft is not needed at all.
In any case, remember: in any situation where a VAZ breaks down, the point is not that it is a VAZ, and it was made poorly. It’s just that the Russian auto industry is a little more delicate than the foreign one, it requires a little more attention and your ingenuity.
Let's sum it up
Taking into account the above information, it becomes clear that the uninterrupted operation of the electric fuel pump of the VAZ 2110 or any other car will depend on correct and timely preventive maintenance, as well as on careful operation and compliance with certain rules.
We also recommend reading the article on how to change the fuel pump mesh with your own hands. From this article you will learn when and why it is needed, as well as how to replace the fuel pump strainer.
Only clean fuel should be poured into the tank and the fuel filter should be changed promptly. It may also be necessary to periodically change or clean the fuel pump strainer, use a moisture displacer from the gas tank, etc. Please note that it is not recommended to drive with an empty tank as the pump will not cool properly.
Finally, we note that in the event of malfunctions in the operation of the internal combustion engine, it is quite possible to diagnose and replace the fuel pump yourself in a regular garage (if you have the tools). However, working with the fuel system will require increased caution and compliance with all safety measures. If you are not confident in your abilities, it is better to turn to experienced specialists.
