After the carburetor has been rebuilt, it needs to be adjusted. Adjustment is carried out using quality and quantity screws until the optimal ratio of fuel supplied to the chamber for forming the air-fuel mixture is achieved.
Fuel
If for an injection engine the poor quality of fuel is even more or less tolerable and you can drive, then for a carburetor engine it is a disaster. Bad fuel not only clogs the jets, but also quickly damages the fuel pump.
Poor quality gasoline can be identified immediately, since the engine begins to “chug”, traction disappears, and if you open the float chamber of the carburetor, the liquid called gasoline will be sticky and will not pass through the nozzles well.
To eliminate the problem, you will have to disassemble and clean the entire fuel system, including the removal of the fuel tank. After cleaning, you need to fill in, albeit expensive, but high-quality gasoline and drive 50-60 kilometers to clean the valve mechanism and piston group.
Although this may no longer help, since the valves and pistons are burned out, and this is precisely the reason. Then a major overhaul of the engine will be required.
Fuel pump and filter
Another reason that the engine starts to stall is an insufficient or intermittent supply of fuel to the carburetor. In this case, the problem will lie precisely in the fuel pump or a dirty filter element.
Therefore, it is recommended to check these elements for functionality. If necessary, repair the fuel pump and replace the fuel filter.
Spark
A missing spark is a sign of a malfunction of the ignition system. Namely, spark plugs, wires or a coil could have failed. Spark plugs are checked on a special spark plug stand, but if there is none, then it is necessary to inspect the elements for damage, measure gaps and resistance. If a malfunction is detected, replace damaged parts.
During the diagnostic process, high-voltage wires are measured for resistance and also inspected for damaged insulation. If you find that one or more wires are broken, they should be replaced. The new wire should have a resistance of 5 ohms.
Air filter
The air filter has repeatedly caused the tripping effect. So, this element must be changed every 20,000 km. It is untimely replacement that leads to problems with the formation of the air-fuel mixture.
Conclusion
If the VAZ 2109 engine carburetor begins to triple and twitch, or traction disappears, then the reason should be sought in the formation of the air-fuel mixture or the ignition system. You can even fix this problem yourself, since the motor is quite simple in design.
Replacing the fuel and air filters on a car is a very simple operation and takes about 15-20 minutes. Many of the readers may say that such an article is not needed, since everything is already clear. However, we have all done something for the first time. And there’s nothing wrong with it when you don’t know what to do and you see it for the first time on a computer picture. Let's start with the air filter. Its replacement is required every 10,000 -15,000 km. Well, if you drive on dusty country roads, then even earlier. The machine's air filter is designed to clean the air before preparing the combustible mixture in the carburetor. If it is not replaced in time, this can lead to carburetor clogging and premature engine wear. It is located on top of the carburetor.
Air filter
To get to it you just need to unscrew the nut on the air filter cover. Unsnap the four latches along the edges of the cover and remove it. And here is the filter itself.
Air filter without cover
If your air filter is in oil, then this may be for the following reason: the engine crankcase ventilation outlet is connected to a hole in the air filter housing. That is, unburned gases from the engine crankcase are fed back into the carburetor for afterburning. Thereby reducing emissions into the atmosphere and slightly increasing efficiency. But if oil also gets there with the gases, proceed as follows: close the hole in the filter housing with a champagne cork (it fits perfectly there), and connect a hose of suitable diameter to the crankcase outlet.
Engine crankcase gas ventilation
The other end of this hose is hanging in the air. The hose length is usually chosen to be 30 - 50 centimeters. This way the crankcase will be ventilated and the filter will not be in oil. We take out the old filter. If there are specks left under it or along the edges of the lid (most often these are midges, flies, pieces of earth), then they must be carefully removed. Just make sure they don't fall into the carburetor. After cleaning the seat, simply place a new filter on it.
New air filter
You can lubricate its rubber bands on top and bottom with machine oil to prevent air leaks between the cover and the filter. We put on the cover, snap the latches, put it in place and tighten the nut. Congratulations, you have changed the air filter on the number nine.
Now let's take a look at the fuel filter of the VAZ 2109. The fuel filter is designed to clean the gasoline coming from the gas tank to the carburetor. Gasoline must be filtered due to the presence of small debris in it: corrosion of the gas tank, low-quality gasoline at gas stations, etc. It is changed every 10,000 km, but given the low quality of local gasoline, it is better to change every 7,000 km. It is located under the master brake cylinder.
Fuel filter location
The fuel filter is attached to the hoses with two clamps.
1. First, loosen the clamp on the engine side.
Disconnect the old filter
2. Then pull the hose off the filter. After removing the engine side hose from the filter, gasoline from the filter will flow back into the gas tank. And the removed hose may also leak some gasoline from the fuel pump. 3. Then loosen the clamp and remove the hose from the gas tank side. Here is the fuel filter in your hands. Upon closer examination, you can see how much garbage there is in it.
Dirty fuel filter
Fuel filter removed
4. We pick up a new fuel filter. We find an arrow on it: the arrow indicates the direction of movement of gasoline. We place the filter so that the arrow points to the fuel pump of the car.
Correct installation of the fuel filter
5. Clamp the clamps. Ready. Now you need to pump gasoline into the filter, since it is still dry. This is done using a fuel pump. By pressing its lever several times, we observe how the fuel filter is filled with gasoline.
Pump gasoline into the fuel filter
Well, that's all, the air and fuel filters of the VAZ 2109 have been replaced.
The design of any VAZ fuel filter is quite simple. It has a cylindrical body (transparent or matte), inside which an accordion-shaped filter element made of special paper is fixed. Often such devices are non-removable, so they are not subject to repair, but to complete replacement.
These devices come in various sizes, equipped with settling tanks or produced without them. Filters can be attached to hoses using nuts or clips. In addition, some VAZ fuel filters are made of metal (aluminum, iron, steel), others are made of plastic.
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Replacing the filter on a VAZ 2108-VAZ 21099
Removal
1) First, remove the housing containing the air filter from the carburetor cover.
2) Next, use a wrench to completely unscrew the filter plug.
3) After unscrewing the plug, carefully remove it together with the copper o-ring and filter.
4) Next, remove the filter from the plug and replace it.
Note! It happens that the filter is in good condition, but is simply dirty, which is why the machine does not work correctly. If dirty, wash the filter in clean gasoline and be sure to blow it with compressed air.
Installation
1) First, take a new filter and install it in the filter plug.
2) Then install the plug, together with a seal made of copper and the filter itself, into the carburetor body.
3) Finally, screw the plug into the carburetor body by its existing edges.
Replacing the filter if the carburetor cap is missing:
1) First remove the cover (for information, see the article: “Adjusting the carburetor fuel level”, in paragraphs “1-8”)
2) Next, use a wrench to remove the fuel filter plug.
3) Remove the plug from the carburetor cap.
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Dear customers, in order to avoid errors when sending a fuel filter, please indicate your car model and year of manufacture in the “Comment” line.
To run an engine you need fuel, everyone knows that. But given the current quality of fuel available on our market, the question arises about the need for pre-filtration to ensure normal engine operation. Filtration consists of two procedures: coarse purification (getting rid of large debris and particles of rusty metal) and fine filtration. Installation of fuel filters can be done in different places of the fuel system, but often this is done within the engine compartment.
The fuel injection filter for VAZ cars with an engine capacity of 1.5 L has a metal body and a high-quality filter element with threaded connections (fittings).
An electric fuel pump installed in the fuel tank supplies fuel through the main fuel filter and the fuel supply line to the injector rail.
1 – fitting for monitoring fuel pressure; 2 – injector ramp; 3 – bracket; 4 – fuel pressure regulator; 5 – electric fuel pump; 6 – fuel filter; 7 – fuel drain line; 8 – fuel supply line; 9 – nozzles
The fuel pressure regulator maintains a constant pressure difference between the intake pipe and the delivery rail. The fuel pressure supplied to the injectors is within 300±6 kPa when the engine is not running. Excess fuel beyond that required by the injectors is returned to the fuel tank through a separate drain line.
A fuel injection system requires better fuel filtration. It should be within five to ten micrometers. This is because dirty fuel can cause chaotic fuel atomization and, as a result, poor engine performance.
Other article numbers of the product and its analogues in the catalogues: 2112011171000, 2112011171082.
VAZ 1111, VAZ 2108, VAZ 2109-099, VAZ 2110-2111, VAZ 2112, VAZ 2113-2115, VAZ 1117-1119, VAZ 2170, VAZ 2121, VAZ 21213-214 i, VAZ 213 1.
Any breakdown is not the end of the world, but a completely solvable problem!
How to independently replace the fuel filter on an injection car of the VAZ family with an engine capacity of 1.5 L.
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The fuel system of VAZ 2108, 2109, 21099 carburetor engines and their modifications uses a fine fuel filter. It is installed in the gap in the fuel supply line before the fuel pump. Its task is to filter out all the dirt going into the fuel pump and then into the carburetor.
Necessary tools and equipment
— Phillips screwdriver for loosening clamps on fuel hoses
— New fine fuel filter
Preparatory work
— We place a container under the filter to collect fuel
The procedure for replacing the fine fuel filter on VAZ 2108, 2109, 21099 cars
— Loosen the clamps on the fuel hoses
We do this using a Phillips screwdriver or a “7” or “8” key.
— Remove the filter fitting from the fuel hoses and remove it
We clamp the hoses with 8 mm bolts and tighten them with clamps.
— Install a new fine fuel filter
The arrow on the filter housing should point in the direction of the fuel pump.
— Tighten the clamps
— Check for gasoline leaks
We pump up gasoline using the manual pump lever on the fuel pump, start the engine and check for fuel leaks on the fuel hoses secured with clamps and on the filter housing itself (it may be cracked).
Notes and additions
— First of all, a clogged fine fuel filter will make itself felt by the appearance of “dips” and jerks in the operation of the car engine when you press the gas pedal, both at low and high speeds. In addition, unstable idling is possible (the speed “floats”).
More articles on the fuel system of VAZ 2108, 2109, 21099 cars with carburetor engines
The fuel filter is an element directly responsible for the performance of the carburetor. But due to the fact that the quality of gasoline often leaves much to be desired, the fuel filter very quickly becomes overgrown with tar deposits, creating an obstacle to the movement of fuel.
Replacing the fuel filter on VAZ 2108, 2109, 21099
That is why the operation of replacing the fuel filter on VAZ 2108, 2109, 21099 vehicles must be performed quite often.
How to change the fuel filter on a carburetor VAZ car?
1. Open the hood and, for safety, remove the negative terminal from the battery. The filter replacement operation must be performed on the car with a cooled engine. 2. Unscrew the clamps on the fuel inlet and outlet hoses. 3. Disconnect the hoses from the old filter one by one, pointing them upward so that gasoline does not flow from them. 4. Take a new fuel filter and connect it to the fuel inlet and outlet hoses, observing the direction of the arrow drawn on the body. 5. Tighten the clamps. 6. Check the tightness of the connections. 7. Attach the negative terminal of the battery and close the hood. 8. Start the engine and check its operation.
The procedure for replacing a fuel filter on a carburetor engine is simple enough that even a novice driver can handle it. However, it is very important to observe safety precautions when working.
Also watch a video on replacing the fuel filter on a VAZ 2108, 2109, 21099
Fuel filter VAZ 2101-09 (carb.) “BIG” GB-203
- Type Carburetor
- Height, mm 93.0
- Diameter, mm 53.0
- Connection diameter, mm 8.0/8.0
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↑ Fuel tank elements
1 — air release hose; 2 — separator hose; 3 - filling pipe hose
First, disconnect the wire from the “–” terminal of the battery.
NOTE! It is recommended to have an assistant remove the fuel tank.
- Fold back the rear seat cushion and unscrew the cut-out part of the sound insulation.
- Unscrew the two screws securing the hatch cover.
- Remove the hatch cover with the rubber gasket.
- Disconnect the block with wires from the fuel level sensor.
- Unscrew the nut securing the sensor, under which the ground wire is secured.
- Remove the wire from the stud.
The remaining operations are carried out under the bottom of the car.
↑ Clamps and hoses
- Loosen the clamp.
- Disconnect the hose from the filler pipe.
- Loosen the clamp and disconnect the air release hose from the fitting on the fuel tank.
- Loosen the clamp and disconnect the separator hose from the fitting on the fuel tank.
- Loosen the clamps and disconnect the hoses from the fuel lines.
- Holding the tank, unscrew the two bolts of the tank mounting clamps.
- Pull the clamps down while supporting the tank. Bend the clamp on the left side behind the resonator pipe.
↑ Removing the fuel tank from the car
- Lower the front end of the tank down and remove it from the vehicle. Drain any remaining gasoline from the tank.
- Unscrew the five remaining sensor mounting nuts and remove the fuel gauge sensor from the tank.
- Remove the sensor gasket.
↑ Diagnostics and repair of the fuel tank
- Inspect the tank along the line where the upper and lower parts meet.
- If you find a leak, pour out the remaining gasoline, thoroughly rinse and dry the tank. Then solder the leak with soft solder.
- If necessary, glue the torn rubber gaskets on the tank.
You can solder only a thoroughly washed tank that does not contain gasoline vapors. Otherwise, when soldering, the vapors may ignite.
To wash the fuel tank, use detergents: “Labomid”, “MS” or “ML”.
To remove any remaining detergent, rinse and steam the tank with hot water. Dry the tank thoroughly.
↑ Checking the sensor
Connect an ohmmeter to the sensor contacts and check the sensor resistance at three float positions:
- in the lowest position (empty tank) the resistance should be 315 - 345 Ohms,
- in the middle position (tank half full) – 108–128 Ohm,
- in the uppermost position (full tank) – no more than 7 Ohms.
If the resistance is different from the specified value, replace the sensor.
↑ Filter and float
Wash the dirty filter. Shake the float. If there is gasoline in it, then the float is leaking. We recommend replacing the float.
↑ Replacing fastening clamps
To replace the tank mounting clamps, remove them from the brackets on the body and install new ones.
We clean the filter on the fuel intake in the gas tank of VAZ 2108, 2109, 21099
A number of malfunctions in the operation of the carburetor engine of VAZ 2108, 2109, 21099 cars are directly related to the degree of contamination of the fuel strainer on the fuel intake in the gas tank.
It is located on the bottom of the fuel intake tube and consists of a fine mesh. In this situation, you should pay attention to the fuel mesh filter of the fuel intake in the car’s gas tank. Many simply do not suspect its existence, some forget about it, others clean it incorrectly. But in vain, since this filter is an outpost of the entire fuel system of the car in the process of cleaning the gasoline entering the engine. Its clogging reduces the fuel supply (or stops it altogether) to the carburetor and then to the car engine. And this just leads to problems in its operation in different modes, including “floating” ones (which appear and then disappear). Features of cleaning the fuel strainer of the fuel intake in the gas tank of VAZ 2108, 2109, 21099 cars
- Removing the fuel intake
You will have to lift the rear seat cushion and remove the fuel intake with the fuel level sensor. Read more about this “Fuel intake and fuel level sensor for VAZ 2108, 2109, 21099 cars, removal and installation.”
- Remove the fuel strainer from the fuel intake pipe
With force we move it down from the fuel intake tube.
- Cleaning the fuel strainer
Take a toothbrush, a little acetone and thoroughly clean all the cells of the filter mesh. Periodically hold the filter up to the light to assess the degree of cleaning, since visually even a dirty filter may appear clean. In the light, cells clogged with deposits and clean ones are immediately visible.
After the cleaning procedure, we blow out the filter with compressed air using a compressor or a regular wheel pump.
- Cleaning the fuel intake pipe
We wash it with gasoline or acetone and blow it with compressed air. At the same time, we clean the fuel discharge pipe into the tank (“return”). After cleaning, check the ease of air passage through the tubes by blowing into them with your mouth.
We install the fuel intake back into the fuel tank, connect the tubes and wires to it.
Notes and additions
— After cleaning the filter on the fuel intake, you should pay attention to the cleanliness of the entire fuel system of the car engine. Clean and replace filters if necessary, blow out fuel lines, clean the gas tank. Deposits accumulate in them over the years, and few people perform routine cleaning of the fuel system once every 30 thousand kilometers.
More articles on the fuel system of VAZ 2108, 2109, 21099 cars
↑ Assembly and installation of the fuel tank
Reassemble and install the fuel tank in reverse order. Before installing the tank, remove the fuel level sensor wires inside the body.
Many owners of a VAZ 2109 with an injection engine have encountered a problem when the car begins to jerk and jerk, and traction is lost. This is a fairly common malfunction for all power units and injection systems. In this article we will analyze the main causes of the malfunction, as well as methods for solving the problem.
Video “State of the fuel purifier after a run of 70,000 kilometers”
This video shows how dirty the fuel cleaning element of a VAZ car is after driving seventy thousand kilometers. The filter material has completely deteriorated and is no longer able to fulfill its duties.
Cleaning the fuel is necessary for the normal operation of a car engine and increasing its service life. The engine must receive fuel purified from various impurities and contaminants. For this purpose, it is customary to install fuel filters. How to work with them on VAZ 2109 and 99, 2114 and 2115 will be discussed below.
Causes of the problem
When a car jerks, it is accompanied by some associated problems. Particularly characteristic of this malfunction is the tripping of the power unit, as well as loss of traction. This problem is identical for the entire family of cars, but is most typical for its younger brother - VAZ 21099.
So, let’s look at the main reasons why the VAZ 2109 injector misfires, the engine does not pull and jerks:
- Poor quality fuel.
- Fuel pump and gasoline filter element.
- Injectors.
- Spark plugs and high-voltage wires.
- Burnout of valves.
- Air filter and throttle.
- Sensors and ECU.
Zero resistance
Of course, there are - filters of zero resistance have long been created, which practically do not delay the air supply, that is, they allow the engine to “breathe deeply”, they simply give 5 - 7% of the power stolen by standard elements, and this indirectly affects both consumption and dynamics acceleration and maximum speed - such a budget tuning.
The principle of such a filter element is a specially selected material from which it is made. How it is assured that these are large pores and a minimum of paper in the structure. Typically, several layers of cotton fabric are used, which is placed on a special aluminum screen.
However, “nuleviki” are not the same; there can be two types.
Solution methods
Once the main reasons why the VAZ 2109 engine fails are identified, you can proceed directly to methods of diagnosing and troubleshooting problems. It is worth recalling that for a complete diagnosis you will need certain tools, as well as design knowledge of the power unit.
We remind you that the VAZ 2109 injector engine has eight valves marked 2111-80.
So, what tools will you need: a set of keys, heads and screwdrivers, a hammer, WD-40, a multimeter, as well as new spare parts that have become unusable. Now that everything is at hand, you can proceed directly to the repair process.
Poor quality fuel
The engine often jerks and tripping occurs because low-quality fuel enters the combustion chambers. This is typical for the CIS countries, especially Russia and Ukraine, since most gas stations dilute gasoline or sell it of low quality.
So, low-quality fuel, in addition to clogging the fuel lines, also, when it gets into the combustion chambers, does not form a normal air-fuel mixture, and therefore the car begins to twitch and jerk, in the worst case, black smoke and shots will come from the exhaust pipe. This means that the gasoline is not the best and should be replaced.
To eliminate the malfunction at this stage, you will have to clean the fuel supply elements, such as the fuel tank, gas lines, injectors and the fuel filter element (which is most likely clogged).
Fuel pump and gasoline filter element
Even if the fuel that enters the engine and its systems is of fairly good quality, you do not need to be sure that the fuel supply elements will not fail. The second reason why a car starts to run poorly is a faulty fuel pump. To be more precise, interruptions in the operation of such an important element lead to an uneven supply of fuel to the engine.
Therefore, it is recommended to check the fuel pump for functionality and serviceability. If necessary, carry out repair operations or replace the element.
Every 30,000 km the fuel filter must be replaced. But, as practice shows, the quality of fuel forces motorists to do this much more often. So, when overhauling the fuel pump, it is recommended to replace the fuel filter, which costs a penny.
Injectors
Another important element that affects the formation of the air-fuel mixture is the injector. Thus, they can fill the spark plugs when the output is high or give a lean mixture when they are clogged. So, during operation they become clogged or fail.
To eliminate the cause, it is necessary to dismantle the elements from the power unit, and then carry out diagnostic operations on a special stand. If diagnostics show that one or more elements are faulty, they must be urgently replaced. The remaining injectors are cleaned and installed back into the power unit.
Spark plugs and high voltage wires
Malfunctions of the spark generation system can also lead to the effect of tripping and jerking. So, the motorist needs to unscrew the elements from the cylinder head and inspect them. If you find that one of the spark plugs is damaged, then the element must be replaced.
It is worth noting that it is recommended to replace all four spark plugs, having previously adjusted their gaps.
As for high-voltage wires, it is necessary to dismantle the elements, as well as carry out diagnostic operations using a multimeter. The resistance in each wire should be about 5 ohms.
Valves burnout
The saddest option for a car enthusiast is a burnout of the valve mechanism. It is worth noting that the VAZ 2109 engine has 8 valves: 4 intake and 4 exhaust. This malfunction leads to several consequences at once.
Firstly, you will have to carry out a major overhaul of the cylinder head, which will not only hit your wallet, but will also take a lot of time. Secondly, most likely, if the valve mechanism is burned out, then there is a problem in the piston mechanism.
Therefore, if it is discovered that the valves and valve seats are out of order, then you should prepare for the fact that it is necessary to carry out a complete overhaul of the engine.
Air filter and throttle
The formation of the air-fuel mixture is also affected by the condition of the air filter element and the throttle valve. According to the technical documentation and manuals of the manufacturer, the air filter is changed every 20,000 km or twice a year: in spring and autumn.
If the throttle valve is clogged, it can be cleaned using carburetor cleaning fluid. It is also recommended to look at the condition of not only the throttle, but also the air corrugation that supplies oxygen.
Sensors and ECU
On VAZ 2109 engines, an electronic control unit January 5.1 was installed to control engine operation. Thus, accumulated errors or a malfunction of the element itself can lead to disruption of the motor. Therefore, it is worth connecting to the part and finding out what state the software is in.
It is also recommended to review the performance of sensors responsible for the normal operation of the power unit, such as the idle speed controller, coolant temperature sensor, throttle position sensor and others. Diagnostics of the elements can be carried out using a multimeter.
How to replace the fuel filter on a VAZ 2109?
Fuel cleaning elements are necessary to ensure that the power unit is supplied with fuel that has been purified from various impurities and dirt present in the tank. The VAZ 2109 fuel filter (installed injector or carburetor) retains all these elements, resulting in a high-quality combustible mixture.
If the filter is clogged or of poor quality, the resins have a destructive effect on all engine systems, clogging pipelines and injectors. The presence of water in fuel contributes to the appearance of rust and damage to system elements, which will inevitably lead to breakdowns in the cylinder-piston group.
Dirt located in the channels along with water in the fuel, when frozen at low temperatures, can cause difficulty starting the engine.
The condition of the fuel purifier largely depends on the external factors in which the car is operated, but to a greater extent on the quality of the fuel.
Contaminated purifier
Experts advise replacing the fuel filter more often than indicated in the documentation. This is due to the fact that the quality of gasoline or diesel fuel at our gas stations is often quite low. Domestic fuel does not have ideal purification or ideal conditions for transportation and storage. As a consequence, an increase in the load on the engine and a decrease in its power, as well as a decrease in the resource of the fuel system.
Replacing a fuel filter, no matter whether an injector or a carburetor is installed, is quite simple, and the filter itself is inexpensive, so do not forget to replace it on time. We will tell you in this article how to save money by installing it yourself.
Conclusion
The reasons why a VAZ 2109 with an injection engine begins to jerk and trip, while traction disappears, have been found, and options for eliminating the malfunction are described. Everything else depends on the knowledge and efforts of the motorist himself. Well, if the process seemed quite complicated, then there’s a direct route to a car service center.
Published 11/19/2020 Author: Iris-Auto
In the Electrical section
Safety precautions during replacement
- Smoking is strictly prohibited when working on the fuel system.
- There should be a fire extinguisher nearby.
- Be careful not to get fuel in your eyes.
- The room in which work takes place must be ventilated.
- Do not replace if it is too hot outside.
- Proceed with replacement only when the engine has completely cooled down.
As you can see, replacing a fuel filter is a fairly simple process that does not require special skills, and even an inexperienced driver can handle it after carefully studying the instructions.
