The flawless operation of any car is ensured by its engine, and its operation, in turn, is simply impossible without clean and high-quality gasoline entering its channels. The main unit for supplying fuel to the engine is, without a doubt, the gas pump, which delivers it from the car’s gas tank through the fuel channels to the combustion chambers. Therefore, it is very important that all gasoline passing through is clean and of high quality.
The video describes in detail and shows how to remove, diagnose and, if necessary, replace the fuel pump mesh on a VAZ-2112.
Fuel coarse mesh in the fuel pump - why is it needed?
The initial cleaning of the fuel is ensured by a mesh mounted on the fuel pump body, and when the car begins to move jerkily and the fuel supply is difficult, first of all you should check the condition of this mesh, because it can be contaminated to such an extent that its initially snow-white color is very difficult to recognize.
Note! The main reason for grid contamination is poor fuel quality!
When to change the screen in the fuel pump?
In order to understand when it is necessary to replace a particular component in the fuel system, and specifically the grid, you need to know about the presence of pressure in the fuel rail. You can learn how to take measurements correctly from this article.
You can also find out about its insignificant condition by the following signs:
- a very prolonged and loud hum occurs , since gasoline is hardly sucked into the system through a clogged mesh. This can significantly reduce the working life of the fuel pump itself and the contamination of the entire fuel system as a whole.
- While driving, when switching to third or fourth gear and then pressing the gas pedal, there is no increase in power .
- Also, a clogged mesh can cause a loss of speed while the car is moving , since the required amount of fuel simply does not enter the combustion chambers.
Pump operation and malfunctions
From the name you can understand that the fuel pump supplies fuel from the tank to the engine injectors. Accordingly, if the unit is faulty, then there will be no gasoline injection, and the power unit will not start working. There are options for injector and carburetor. The VAZ 2110 is equipped with an injector; therefore, the fuel pump must be suitable for this system. If the “ten” was modernized by installing a carburetor, then the unit will have to be taken out of stock. The unit is located in the fuel tank - under the left rear door, the electrics go under the rear row seats.
Article on the topic: Installation of ventilated brake discs on a VAZ 2114
It is quite simple to understand that there are faults in the pump or its network:
- The car won't start. There are many reasons for this malfunction, but before performing a full diagnosis, you need to check whether the pump mesh is clogged or clogged.
- There are noticeable jerks in first gear. There are also many options here, but one of them is a non-working fuel pump.
Description of the 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. It is accessible from the cabin, so no inspection holes or other additional devices are required. Only tools needed:
- open-end wrench 13 and 17 mm;
- Phillips screwdriver;
- 7 mm tubular socket wrench.
Instead of a long 7 mm tubular wrench, you can use a small open-end wrench, but this will be inconvenient and take more time. Before starting repairs, you should completely remove and pull out the rear seat to gain access to the gas tank. Two more preliminary operations that are done in the engine compartment.
- Loosen the nut securing it to the negative terminal of the battery, remove the clamp along with the wire.
- Relieve pressure from the fuel line. At the end of the ramp, near the outer nozzles, there is a bleed valve with a rubber cap on it. Having removed it and substituted a plastic cup, you need to press the valve stem. Fuel will leak out from there and the pressure in the system will drop.
Under the bottom of the rear seat there is a square hatch that provides access to the gas tank; it will need to be removed. The subsequent disassembly diagram looks like this.
- Using a Phillips screwdriver, unscrew the 2 screws securing the hatch cover, remove it and put it aside.
- Disconnect the fuel pump electric drive connector and move it out of the way.
- Using an open-end wrench, loosen and unscrew the 2 nuts that secure the fuel line pipes to the fuel pump fittings.
- Pull the tubes out of their sockets. The round rubber rings attached to their ends must be removed and replaced with new ones, since they are designed for one-time use.
- Using a long tubular wrench, unscrew the 8 nuts that hold the flat flange that presses the VAZ 2110 fuel pump to the bottom surface. Remove the flange from the studs.
- There is a rubber gasket on the mounting studs under the clamping part of the body. The latter must be removed from the studs, otherwise it will not make it possible to pull out the fuel supply device. Then carefully remove the fuel pump from the tank cavity along with the float. If the rubber gasket is worn out, then it is better to replace it too.
Signs of a clogged filter
By indirect signs you can determine whether it is dirty, but it is not always possible to reliably find out about its condition without visually assessing the mesh.
Signs of a dirty filter:
- The car accelerates poorly;
- There is no necessary dynamics;
- Unstable idle;
- The engine starts poorly and stalls;
- Increased engine vibrations;
Based on the signs already stated above, you should begin inspecting the fuel system and be sure to start with coarse and fine filters. You can read how to replace the fine filter here.
Also, if the mesh is very dirty, the fuel pump itself may fail. Therefore, it is not recommended to neglect its replacement.
How to measure the pressure in the fuel system?
The easiest way to measure pressure is with a special device - a pressure gauge. The kit also includes an adapter and drain. Pressure can be determined using an air pressure gauge. This device is present in almost every motorist, as it is used to measure tire pressure. A normally functioning pump in a VAZ 2110 should have a reading of 2.8-3.2 atm. You need to connect the pressure gauge and check what the indicator is with the engine not running, but with the fuel pump on. It must be no lower than 2.8 atm.
Replacing the fuel pump filter
VAZ 2110 fuel pump filter
Now we finally come to the most important part, replacing the fuel pump filter. Replacing the fuel pump is usually done with your own hands and takes no more than thirty minutes.
- First you need to disconnect the wires from the battery (usually the wire with minus voltage is disconnected);
- Then we move into the car interior and remove the passenger seats, since the fuel pump is located directly under them (electric);
- When we finally see the fuel pump, we need to carefully remove two screws from it and lift the cover;
- We see the power supply; it must be turned off;
- Then we take out the entire fuel pump and unhook the filter from it;
- We install a new filter, carefully attaching it;
- We put the fuel pump back in its place.
That's all, a new filter for the fuel pump has been installed and we did it ourselves. A fuel pump filter usually does not cost too much and its maximum price is 200 or 500 rubles. If these instructions are not clear enough, you can watch a video or photo and figure it out.
Types of filters: which ones are better
Car enthusiasts who are about to change coarse or fine filters for the first time often ask other VAZ owners which filter element is best to choose. The cost of products from all manufacturers is approximately the same, so you want to get competent advice “first-hand” and avoid incorrect recommendations.
On car owner forums, filters from the Big and Mahle brands are most often mentioned. It should be remembered that no one is insured against manufacturing defects.
However, VAZ owners often support domestic manufacturers by purchasing Salyut filters. The most popular parts are:
- article UT-00002606, catalog number 21080–1117010 - with sump;
- article 00000011756, catalog number: 21230–1117010;
- article: 00000009674, catalog number 21120–1117010.
The Salyut filter differs from analogues in its acceptable quality and more than attractive price
Why is it needed?
There is a coarse filter that comes first from the gas tank. After all, first the lid where the fuel tank is located is opened, a gun is inserted there, the magic button is pressed and the fuel flows. Yes, it takes a lot of your money along the way, but what can you do? The location of the tank can be on the left or right, but this does not play a special role. Coarse cleaning, which is a mesh that traps large particles of debris.
This is followed by a fine filter. This is exactly what we will talk about. This element is called a fuel filter. With its help, small particles are retained. But even they can penetrate your diesel engine or gasoline injector.
Dust, dirt, debris, rust elements. All this can penetrate the system, causing a clogged pipe, tube, valve, fuel hose, or fuel pump components. Nothing good will come of this if timely replacement is not made.
To understand how to replace the filter, which element to choose and how to choose an analogue for the device you are going to change, you need to have at least a basic understanding of such an important component of the car.
I suggest starting with varieties.
Kinds
Modern fuel filters installed on Ford Focus, Nissan Almera, Hyundai Solaris, Nexia, Mazda, Opel, BMW e60, Renault Logan and Megane, Kia Rio and many others have at least two degrees of purification.
- First degree. This is a rough cleansing that allows you to get rid of large contaminants. Not to be confused with a regular mesh in the tank, which is not available everywhere.
- Second degree. Fine cleaning. This is the main task that falls on the shoulders of the filter.
And here you probably have the main question - where is the filter device located? I don't know. No, I can answer, but if you tell me specifically what make of your car or what year of manufacture. After all, on the same Chevrolet Niva, different Opel, Toyota, Mazda models, on the Volkswagen Passat B3, as well as on the domestic VAZ 2114, 2112 and 2110, the location may differ.
However, they are always located somewhere between the engine and the gas tank, since the filter's job is to prevent contaminants from entering the engine while the fuel moves from the tank to the engine. What's in the gas tank itself? That's right, a coarse cleaning device. This is an additional filter element so that any unscrupulous gas stations do not spoil your car.
Now let’s talk about the types of filters themselves. What element will be on the car? It depends on the type of engine. There are three of them, as you know. Except for electric motors. Well, there is no need for a fuel filter, as you understand.
Therefore, there are three types of filters:
- carburetor;
- diesel;
- injection.
Location
So you bought yourself a brand new sedan and you think it’s time to change the filter for this engine. Want to choose the best? Well then, take a closer look at Cummins devices. Mann, Hertz. They have proven themselves well, and they cost quite a bit.
You probably know whether your engine is diesel, injection or carburetor
This is important to understand the location of the fine filter, that is, our today's hero
- Carburetor. In these engines, the TF (fuel filter) is placed in front of the carburetor itself, and is often in a transparent housing to control contamination. These are the most basic devices, because the carburetor is the least demanding on the quality of fuel.
- Injector. It uses nozzles and therefore requires high-quality filtration. And the fuel is supplied under high pressure. Therefore, the filters are enclosed in durable metal housings. The TF has to be regularly maintained, cleaned and monitored for its condition. They are placed mainly under the bottom of the car to make it easier to dismantle and replace.
- Diesel. A diesel engine also needs high-quality purified fuel, since the system is quite sensitive. Diesel fuel has a higher moisture content than gasoline. The TF is designed to filter debris and remove accumulated moisture. A separator is provided for this purpose. The location is quite simple - between the engine and the pump that pumps fuel.
Any fuel system must include a TF. They are replaced assembled, that is, there is no point in removing the filter elements themselves (usually special paper), leaving plastic or metal. Be sure to look at the number and article number of the filter that is installed on your machine, and check the operating manual from the factory. This is the only source of truthful information regarding the maintenance of your particular vehicle in this configuration and with this type of engine.
How to replace the fuel pump mesh on a VAZ 2110-VAZ 2112?
1) About a car with a 1.5 liter engine, we already said a little higher how the mesh is changed on them, let’s remember again, first the glass is removed from the pump and put aside, then you take a screwdriver and use it to remove the mesh by prying and that’s it the mesh has been replaced, read below about the installation, but before you do all this, you need to remove the fuel pump itself, and not all people know how to remove it, we described the detailed removal process in the article entitled: “Replacing the fuel pump on cars.”
2) Now let's talk about sixteen valve cars, let's say you've already removed the pump from the car and it's in your hands and you need to replace the mesh, first you'll need to stock up on a screwdriver and use it to remove the retaining ring from the guide (Some people also call it a pin), this ring only one, although there are two guides (In the photo below this ring is indicated by an arrow for clarity, it is removed as follows, first picked up with a screwdriver and then guided to the very end of the guide in the direction where the blue arrow is shown and it is guided until it is completely will be removed), after which your main task is not to turn the fuel pump over, otherwise the housing will spontaneously fly out and the hoses may break.
3) Let's go further and now you will need to disconnect two wire blocks, both are shown with arrows in the photographs below for clarity, they are easily disconnected and if you pull with force and they do not disconnect, then you are doing something wrong and there is a possibility that you will break the clamps this way , so look for these pads and, by pressing on the latches that hold them, carefully disconnect them (you will need to press some of the latches, bend some, both pads are attached differently, you can clearly see how to disconnect them in the video clip which is located at the very end of the article ).
4) And now that the locking ring has been removed, both pads are disconnected, you can take the upper part of the fuel pump with your hand and separate the two housings from each other along the guides; when they are separated, put one housing aside, and continue to hold the fuel pump housing in your hands and do exactly the same Using a screwdriver, disconnect the mesh and remove it, replacing it with a new one.
The new mesh is placed on the car in the reverse order of removal, when installing, make sure that it is perfectly fixed and does not fall off, with the fuel pump the situation is the same both in assembly and installation, by the way, when everything is installed, we recommend that you take your time and do not install fuel pump flap with a rear seat cushion, or better yet, ask an assistant to turn the key in the ignition for 5 seconds, and at that time you look to see if gasoline is flowing from under the fuel pipes or from anywhere else, the entire system must be sealed and if so If necessary, replace all worn parts with new ones.
