Causes of failures at low speeds of the VAZ 21099 solved

>If the VAZ 2109 jerks when moving, then the reason lies in one of the following malfunctions: 1) Problems in the VAZ 2109 power system.

Power system VAZ 2109

2) Problems in the ignition system of the VAZ 2109.

Ignition system VAZ 2109

Dirty fuel filter VAZ 2109

2) Mesh filter in . A clogged filter leads to the same thing - the VAZ 2109 carburetor does not receive the required amount of fuel. It is necessary to check the cleanliness of the filter and, if necessary, blow it with compressed air. 3) VAZ 2109 carburetor accelerator pump. If the car jerks during acceleration, this very often indicates a malfunction of the VAZ 2109 accelerator pump. 4) Sediment in the carburetor float chamber. If the VAZ 2109 jerks not during acceleration, but precisely when the car is moving evenly with the gas pedal in a fixed position, then this may be caused by debris getting from the float chamber into the fuel nozzles. To check, remove the carburetor cover and make sure that the float chamber does not contain sediment. 5) Fuel pump VAZ 2109. If the car jerks at high speeds, then perhaps the fuel pump does not provide the necessary fuel supply. To increase the fuel supply, adjust the fuel pump pusher.

Adjusting the fuel supply in the fuel pump VAZ 2109

6) Poor quality of gasoline. It happens that you can refuel with gasoline mixed with water. Naturally, water does not burn, and when it gets into the engine it causes the engine to jerk. 7) Low fuel level in the tank. Due to the fact that fuel is mixed with air, the car may jerk. Here, in principle, are all the main reasons for the fuel system. In principle, everything is clear: first, we check the carburetor to ensure it is not clogged and the fuel supply. If everything is in order, then the ignition system of the VAZ 2109 comes under suspicion. Malfunctions of the ignition system of the VAZ 2109, causing the car to jerk. 1) Vacuum corrector of the ignition distributor of the VAZ 2109. We check the tightness of the tube from the carburetor to the vacuum corrector, as well as the ease of movement of the correcting shutters.

Ignition distributor VAZ 2109

2) Burning of the ignition distributor contacts. 3) Test for ground or spark plugs. If the engine operates properly at idle, this does not mean that it will behave this way in all engine operating modes. Under load, due to poor insulation, a spark plug or high-voltage wire can be pierced to ground, but work normally at idle.

High-voltage wires VAZ 2109

4). The switch may also behave inappropriately. It may work fine, and then, within a couple of minutes, misfire. Personally, I always carry a spare switch with me. I know that many people do the same. Therefore, if possible, install a spare switch and ride it. If the problem goes away, then the problem was in the old switch.

Switch VAZ 2109

5) When the ignition coil overheats, it can also be the cause of jerking in the VAZ 2109. As you can see, there are many reasons, and it is not always immediately clear where to go. But if you check all the points listed above one by one, then the reason that the VAZ 2109 is twitching will be discovered.

FakeHeader

Comments 39

There was a problem of the same kind.
It turned out there was a bad contact on the plug that goes to the hall sensor, or rather the minus was bad. In short, I discovered the cause and eliminated it. There was a bad contact on the connector of the HOL switch (which is on the distributor). During sharp acceleration, the engine leaned back and the contact lost power. Thanks to all.

I was happy early. Traveled 10 km. and twitched. I repeated the procedure with suction (up to 5 tons of volume) and drove off again. 15 km. the flight is normal. These are the miracles.

I'll report back briefly. I remembered that the carb has a fine filter, so I decided to take a look. He unscrewed it, pulled out the mesh and blew it out. Although she was already clean. I decided to tug on the explosive wires and accidentally touched the wire of the coolant temperature sensor. The engine jerked. The wire began to move, the engine began to twitch. Disconnected the motor wire. stalled. Pressed the contacts on the terminal and inserted it into place. I started the engine, warmed it up and pulled the choke sharply several times. Raising the speed to 3x.-4x. thousand...And she GO! I don’t know what happened. I drove around the area for about 10 minutes, it goes as before. Some kind of miracles. Thank you all for your kind words and participation!

accelerator pump / hall sensor / switch / capacitor in the distributor / perhaps one spark plug is cut out. It's easy to check the fuel pump; you rip out the hose from the carb and start the car.

you think correctly, the accelerator is most likely clogged

I was also twitching, I changed the fuel pump with the rod and cleaned the carb with all the jets. The problem is gone.

Now I have carried out “diagnostics”, the pump pumps normally, the accelerator splashes where it should, it accelerates well in place and does not stall. But he doesn’t want to go. And only FORWARD, engaged the rear, starts with slipping, and jerks forward. That's funny! Now I’ll go with the choke and try to get going.

remove the carb and blow it out and check the membrane at the same time

Yes, judging by the quality of the gasoline + all sorts of other crap accumulates in the tank over time, something clearly gets into the carb and it’s clogged. remove, rinse, blow, change membranes if bad

if it jerks during acceleration, you need to start with the fuel system, change the filter, flush the carburetor, the problem I think is that at the time of acceleration there is not enough fuel in the chamber, this is purely my opinion)

If your engine runs smoothly with smooth throttle release, then what does the ignition have to do with it? obvious lack of fuel. look from the pump to the carb. Most likely just clean the carb and everything will be fine.

Mmm. and the carb did not unwind? I had something like this right after the purchase, it was unexpected

Look at the fuel pump rod!

The advice is to remove it, wash it and rehearse the carb and forget about it.

I think it’s something to do with the carb; on my 9th, in three years, I had these symptoms twice! and all the carbs! and during jerks the suction did not try to tighten! I passed!

On the O6 the accelerator was soaring and the brain was simply infuriating during aggressive driving.

In any case, the vacuum seal disappears, half of the people drive without it, most likely it really is the accelerator

which half? You and your loved ones?

This happened to me because of the ignition coil! At first I thought the carb was removed, cleaned, installed, but it still twitches... replaced the coil and everything is OK))

Yes, it seems like she should have three then. Moreover, at any speed, with a load (while driving) and without.

it can’t triple because of the coil... if it can light 3 candles, then why can’t it light the 4th? Hence the conclusion that the problem is either due to the distributor cap, or the drive, or the spark plug

Well, we don’t take fuel and compression into account now... So install a known-good coil... The person says that this happened). maybe triple! it just may not work at a certain moment... the cylinders will trip one by one, I couldn’t figure out which cylinder was tripping!

maybe triple! it just may not work at a certain moment... the cylinders will trip one by one, I couldn’t figure out which cylinder was tripping!

Yes, it seems like she should have three then. Moreover, at any speed, with a load (while driving) and without.

I just had severe misfires... and the coil either worked normally, or there were misfires. sometimes you drive 90 km, everything is fine, and suddenly it starts to twitch... you give the gas to the floor, a huge dip appears, and the revolutions drop, and if you press the gas little by little, it twitches very weakly

VAZ 2109 twitches - How to repair a VAZ

The turn signals on the VAZ 2108, 2109, 21099 do not work
>If the VAZ 2109 jerks when driving, then the reason lies in one of the following malfunctions: 1) Problems in the VAZ 2109 power system.

Power system VAZ 2109

2) Problems in the ignition system of the VAZ 2109.

Ignition system VAZ 2109

For stable engine operation, timely supply of fuel and spark at the right time is necessary. If there are gaps in the fuel supply, the car will jerk. Also, the VAZ 2109 will twitch if the spark to ignite the combustible mixture stops being supplied. So, let's figure it out in order, what problems could be with the power system that would cause the VAZ 2109 to twitch when moving? 1) Clogged. A clogged fuel filter limits the amount of fuel entering the carburetor. The fuel level in the float chamber drops and the engine jerks. Therefore, if you have driven more than 10,000 km on your fuel filter, you can safely change it. Moreover, given the quality of domestic gasoline, it becomes clogged much earlier.

Dirty fuel filter VAZ 2109

2) Mesh filter in . A clogged filter leads to the same thing - the VAZ 2109 carburetor does not receive the required amount of fuel. It is necessary to check the cleanliness of the filter and, if necessary, blow out with compressed air. 3) VAZ 2109 carburetor accelerator pump. If the car jerks during acceleration, this very often indicates a malfunction of the VAZ 2109 accelerator pump. 4) Sediment in the carburetor float chamber. If the VAZ 2109 jerks not during acceleration, but precisely when the car is moving evenly with the gas pedal in a fixed position, then this may be caused by debris getting from the float chamber into the fuel nozzles. To check, remove the carburetor cover and make sure that the float chamber does not contain sediment. 5) Fuel pump VAZ 2109. If the car jerks at high speeds, then perhaps the fuel pump does not provide the necessary fuel supply. To increase the fuel supply, adjust the fuel pump pusher.

Adjusting the fuel supply in the fuel pump VAZ 2109

6) Poor quality of gasoline. It happens that you can refuel with gasoline mixed with water. Naturally, water does not burn, and when it gets into the engine it causes the engine to jerk.7) Low fuel level in the tank. Due to the fact that fuel is mixed with air, the car may jerk. These, in principle, are all the main reasons for the fuel system. In principle, everything is clear: first, we check the carburetor to ensure it is not clogged and the fuel supply. If everything is in order, then the ignition system of the VAZ 2109 comes under suspicion. Malfunctions of the ignition system of the VAZ 2109, causing jerking of the car. 1) Vacuum corrector of the ignition distributor of the VAZ 2109. We check the tightness of the tube from the carburetor to the vacuum corrector, as well as the ease of movement of the correction shutters.

Ignition distributor VAZ 2109

2) Burning of the ignition distributor contacts. 3) Ground fault or spark plugs. If the engine operates properly at idle, this does not mean that it will behave this way in all engine operating modes. Under load, due to poor insulation, a spark plug or high-voltage wire can be pierced to ground, but work normally at idle.

High-voltage wires VAZ 2109

Switch VAZ 2109

Elimination methods

It is worth understanding that tripling on a carburetor power unit will occur not only while driving, but also at idle speed. In this case, the motor will make sounds like popping noises. But the car will twitch only while driving. So, it’s worth going directly to the analysis of the process of diagnosing and troubleshooting.

Carburetor

Unlike injection engines, a carburetor is a rather finicky thing that is sensitive to fuel and the technical condition of parts. Therefore, many motorists know that the power unit can stall precisely because of the carburetor. This version of the car was equipped with an injection element marked Solex, with which many are familiar.

To cure the shaking and jerking of the car, you will have to sort out and clean the carburetor. The cleaning process occurs manually or using a special oven that heats the cleaning liquid. But, as practice shows, most car enthusiasts who clean carbs with their own hands do the process completely manually.

Calibration data for the carburetor installed on VAZ 2108, VAZ 2109, VAZ 21099 vehicles

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.

This is interesting: Wiring diagram for VAZ 2107 carburetor

Air filter

VAZ 2109 twitches while driving carburetor Topic author Peter

Fuel level sensor FLS for VAZ 2108, 2109, 21099 cars

Hi all. please help whoever can. Machine VAZ 2109 carburetor 92 years old. Solex carburetor. . The problem is that just yesterday the car began to twitch while driving, but rarely and hardly noticeably, today it’s really bad... Starts PERFECT both cold and hot. does not sneeze, there is no smoke from the chimney except normal warm air as usual. It idles like clockwork. in neutral, if you stand, it reacts sharply to the gas, as always

but everything changes during the trip... 1st and 2nd gears I didn’t notice that it was jerking, but 3rd and 4th it started.

. it doesn’t matter whether I accelerated smoothly or squeezed something…. I turn on third, for example, and it seems to stall, and it’s as if I’m rocking with the ignition turned off at 3rd speed. then it stabilizes and seems to be driving normally again and it happens again... During the half hour trip she behaved like this 20 times... all I checked and tried to do was remove the fuel receiver with the fuel level sensor, saw a dirty mesh, and just for fun I removed it altogether. nothing has changed. Everything in the air filter is dry, no traces of moisture or oil...the antifreeze doesn’t go anywhere, and the oil doesn’t. Writhing, all the indicators are generally normal, but what could it be?? ? There was a similar situation relatively recently, I changed the distributor cap due to worn contact and the system started working, if important, the distributor cap was replaced 4 months ago. and for 4 months I enjoyed driving without any problems at all... except for the fact that I’ve been driving a nine for 92 years...) in general, tell me who can do what...

Christina carb needs to be adjusted as it should be

Yana This often happens just because of the distributor, try to double-check all the contacts again. It may be necessary to replace the cover again.

Margarita I had a similar thing on Ksenia cars 1. Replace the air filter Yulia 2. Replace the fine fuel filter Nadezhda You can do it in 100 rubles 3. The nut fell into the carburetor chamber Arthur

Polina Clean the accelerator pump jet. Remove the top half of the carb. Take out the tube with the spout, clean the jet underneath with a syringe or pump.

Natalia This is a familiar defect, few people know or guess. 90% of the time the reason is a loose fit of the solenoid valve jet socket or air leakage there. Excess fuel just leads to this phenomenon. At first it nods and even tries to stall. Check and clean the XX jet, blow out the channel itself, check the tightness of the fit, but tighten it without fanaticism, it’s easy to break the thread. There is also a rare defect, when the main fuel jet of chamber 1 is not tightly screwed in, leading to the same phenomenon.

Yaroslav, try installing a different switch

Oksana I had this happen on a VAZ-2109, I cleaned the carburetor, changed the air and fuel filters, it didn’t help. I read that the idle speed sensor needs to be changed Andrey, he changed it - as the grandmother whispered :).

VAZ 2109 stalls and jerks when accelerating - Wroom.ru forum ...

May 20, 2010 ... VAZ 2109 stalls and jerks when accelerating ... also starts abruptly (like a kick in the ass) or stalls. when the ignition is turned off... But with such problems, it will work fine at idle...

the car jerks while driving what is the reason Autosite

Repair of the fuel pump on carburetor VAZ 2108, VAZ 2109, VAZ 21099

It happens that a driver has to deal with such a picture - a car that was working perfectly suddenly begins to move jerkily. This problem may appear in different driving modes and in different situations.

It happens that a driver has to deal with such a picture - a car that was working perfectly suddenly begins to move jerkily. This problem can manifest itself in different driving modes and in different situations. One reason is when the car jerks at speed when driving in a straight line. For a completely different reason, the car jerks when changing gears.

Let's take a closer look at why this happens.

With carburetor engine.

If the car jerks when accelerating, then the problem may be a lack of fuel with an intensive increase in speed. For carburetor engines, VAZ classics, the problem will be in the carburetor. It is necessary to check the main jets and economizer.

Blow them and the channels leading to them. Make sure that the carburetor does not have any foreign air leaks and that there is a normal fuel level in the float chamber. This work requires complete or partial disassembly of the carburetor, during which it is necessary to prevent dirt from getting inside it.

If the car jerks while driving, with the gas pedal in the same position, the problems may lie in the electrical part. First of all, you need to deal with the spark plugs, high-voltage wires and the breaker-distributor

When you remove the wire from a non-functioning spark plug, the engine speed does not change. In this case, the wire may also be faulty. You also need to check the breaker cover.

There should be no burnt contacts or cracks on it.

The above problems with the carburetor can also have an impact here. In addition, in hot weather, plugs of gasoline vapor may form in the gasoline pump, impairing or even interrupting the supply of gasoline to the carburetor. If the gasoline level is insufficient, the car drives jerkily (jerks periodically at speed).

With injection injection

A car with injection injection jerks while driving and during acceleration, also due to the supply of gasoline or electrical equipment. But the injection system here is already controlled by a computer. While you can sort out the spark plugs and wires, you can no longer detect a failure of the electric injector valve by eye or touch.

With diesel engine

Another case – diesel cars

For injectors connected to a plunger pump, the needle may get stuck in the sprayer. For Common Rail injectors, the internal electronic valve may fail.

The car jerks when changing gears

Let's consider when the car jerks when changing gears. Here, jerking usually begins when starting from a stop, when the clutch pedal is released. Here, the cause may be oiling of the friction linings of the clutch driven disc with oil that got from the engine through a leaky cuff on the crankshaft.

The problem may be uneven wear of the linings, loss of elasticity of the damper springs.

It is worth mentioning cars with automatic transmission here.

If in doubt.

Even though the nature of the malfunction is understandable in general terms, it is not always easy to find the specific culprit for the twitching that appears. We can say that you are lucky if you immediately managed to find a faulty spark plug or wire. Replacing them is quite easy. With other elements of electrical equipment it is more difficult.

Here you already need certain knowledge. If the words “check the capacitor of the breaker-distributor” only raise a question mark in your mind, then it is better to contact a specialist. When it comes to systems with electronically controlled injection, or automatic transmissions, then acting at random can lead to the most expensive consequences.

Then the last question remains.

Who to contact.

Now there are a large number of services. How to choose among them the one where your car will be “cured” of faults, and you are guaranteed not to encounter them the next day after the repair. First of all, you need to focus on a service that has a separate section equipped with various diagnostic equipment. Here we can recommend, at the service station of which there is a diagnostic point with modern equipment. Master diagnosticians are highly qualified and work with cars of a wide variety of brands.

The enterprise itself is located in Moscow on Smirnovskaya street 25 bldg. Here you can make repairs and immediately see the results.

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Cleaning the injector

On the other hand, if the car starts normally, but the jerking is detected only while driving, most likely, standard injector cleaning will help completely solve the problem.

Before moving on to cleaning the injector (which, in fact, cannot be called a simple procedure), it is recommended to check the functionality of the spark plugs. It may well be that it is because of them that the injector twitches.

If everything is in order with the candles, you need to move on to further actions.

Clogging of the mechanism varies. Experts distinguish three stages:

The last stage is extremely dangerous, since the engine will soon come to an end if measures are not taken.

Flushing

Car enthusiasts who do not have specialized knowledge of an auto mechanic should not even think about flushing the engine with their own hands. It is recommended to order the procedure at a service station, where experienced professionals will carry out all the necessary measures.

The danger of washing yourself is that, unknowingly, you can make things even worse. The engine is a delicate thing, and it is possible that after washing it will not start or work at all.

However, some owners, having seen how the masters do it 1-2 times, having familiarized themselves with theory and practice, next time they cope with this matter on their own.

Liquid flushing

This is the first type of flushing of an injection engine. The machine starts, but is disconnected from the power system. Then flushing equipment is connected to the motor, supplying liquid directly to the injectors. This procedure is carried out on a hot motor, i.e., it functions as it moves.

It is extremely important that liquid does not get into the fuel tank, otherwise it will lead to dire consequences. Its composition is caustic and easily decomposes deposits on the walls, which will ultimately lead to severe clogging of the filter and pump. You will definitely have to change them.

As for the type of flushing fluid, it depends on the following: the age of the machine and the degree of contamination. You need to entrust the choice of flushing fluid to specialists who deal with cleaning injection systems periodically and have already gotten their hands on it. They will be able to choose exactly the composition that will not harm the engine.

Regarding the timing of liquid washing, this is clearly stated in the regulations. Carry out one flush every 30,000 km.

Such different reasons for twitching

Four groups of reasons, including dozens of fault variants, do not exhaust the entire range of possible breakdowns. First, let's look at the most common failures from the first group.

Problems with the ignition system include failure of the spark plugs. The reason for failure may be soot on the candles, their age, counterfeit candles are often found. The inspection of the ignition system must begin with the presence of a spark.

Often the cause of failure of the ignition system is the failure of high-voltage wires. To ensure their performance, you need to check that the resistance meets the standard value. You can try to slightly move the ignition module: maybe the contact has moved away - this often happens on the VAZ 2109.

In the engine control system, the sensors that most often fail are the throttle valve position (TPV), air flow rate (MAF), and crankshaft phase (CPCV). It happens that the electronic engine control unit breaks down. Diagnostics of the control system requires special equipment, and car enthusiasts often try to change sensors at random, hoping to guess the cause of the malfunction.

There are rare causes of jerks when moving the “nine”, ranging from a banal incorrect choice of gearbox ratio to a fatal breakdown of the cylinder head gasket and many other exotic options.

About the transmission

Now a few words about the transmission, since it can also cause jerks when driving.

As you know, cars use manual and automatic transmissions.

As for a manual transmission, the gearbox and everything that follows it cannot cause jerking.

A manual transmission is a fairly simple design, and if it already breaks, it breaks specifically, and not creating jerks.

But the clutch can cause jerking. If it is heavily worn, in particular the driven disk, or “slips,” then the car easily begins to twitch.

But as a rule, jerking and twitching with such malfunctions occurs during gear shifting.

But in automatic transmissions, the cause of the twitching is precisely the gearbox itself.

It is very dependent on the quantity and quality of oil, so a lack of oil or its foaming can easily cause uneven running of the car.

You can measure the oil level in the automatic transmission using a dipstick.

Or without.

It all depends on the design of the automatic transmission.

How to measure the oil level in an automatic transmission.

Significant wear of the automatic transmission, as well as clogged oil channels, also causes the car to jerk at all speeds.

What to do VAZ 2109 carburetor twitches while driving

Jerking while driving is an unpleasant moment for drivers. We have already raised this issue during the discussion of various malfunctions, and often the VAZ 2109 fuel filter (carburetor) is to blame. We recommend checking it first.

If you encounter a problem such as jerks and dips? Then we will explain to you the main reasons for this malfunction.

The VAZ 2109 car (carburetor) jerks while driving, this can be for the following reasons:

the accelerator pump is faulty;
There are problems with the vacuum corrector of the ignition distributor.

How to find out the causes of the malfunction?

You will need two wrenches - "eight" and "ten", straight and Phillips screwdrivers, a clean rag, some copper wire. The wire diameter should be thinner than 0.3 mm.
In addition, you will need a compressor and WD40 fluid.

The operating procedure is as follows:

Armed with a ten key, remove the cover from the air filter housing by unfastening the spring fasteners. Remove the filter. Using an eight wrench, unscrew the nuts and you can now loosen the clamp on the crankcase ventilation hose where it connects to the valve cover. After this, you can remove the filter housing.
Now you need to remove the vacuum corrector drive hose and create a vacuum to make sure it is tight.
The corrector may need to be replaced. It’s better to entrust this to the car service workers.
If air cannot flow freely during purging, then look at how things are going with the carburetor. For example, make sure its air damper is open. When you press the throttle lever, a stream of gasoline should come out of the nozzle. Make sure they are there and the fuel spray direction is correct.
In case of any problems, the car must be sent for service.
Carefully remove the hose leading the fuel to the carburetor, without spilling gasoline. We do the same with the choke control cable, and then with the wire that is located on the idle air solenoid valve. Now unscrew the screws securing the top carburetor cover. After removing the lid, place it with the floats facing up so as not to damage it.
Now, using a screwdriver, carefully pry up the nozzle tubes and pull it out of the socket.
After you do this, you need to take a thin copper wire and carefully clean the holes in the spray nozzle. Then you should blow it in the opposite direction (against the movement of fuel).
We install the sprayer. In this case, without closing the carburetor cover, you need to press the damper drive lever. We check the appearance of streams of fuel running from the nozzle tubes.
We assemble the carburetor.
If there were no streams, then you need to check how easily the accelerator pump drive lever moves. We also check whether there is any play in the drive. If necessary, we lubricate it with WD40 and replace everything that is faulty.
Let's check the streams again. If they are, we assemble the carburetor. If not, we go to the service center.

If the VAZ 2109 carburetor jerks during acceleration

Here the list of possible reasons is also extensive. This is both a malfunction of the fuel filter and the possibility of a low fuel level. It is also possible that the fuel pump is not working correctly, or the additional fuel filter is clogged. It could also be an ignition problem. It’s better not to delay and seek professional diagnostics.

Take care of those you have tamed

But never set foot on a compromised gas station! Use only proven network gas stations. You have an “old” car, it needs to be cared for and cherished, given regular oil from certified manufacturers on time, filled with high-quality gasoline and loved.

It is not hard. There are quite a lot of reputable companies in the country that have long and tightly occupied their market niches, care about their reputation, and have certified quality assurance systems. Among them are representatives of the world's largest oil companies. They carry out geological exploration, development, and exploitation of oil fields, production and marketing of petroleum products. The gas stations of these companies offer all types of motor fuel.

A typical gas station is usually a large complex with 12 or more gas stations. The driver can get the necessary assistance from a gas station attendant, pump up the tires of his car, top up the radiator with water, use the toilet at no extra charge, and shop at a self-service mini-market where snacks and drinks, including chilled ones, are available. Gas stations have a small cafe; the gas station often smells of freshly brewed coffee.

Don’t be fooled by the cheapness, fill in with high-quality fuel and go ahead.

The situation when a relatively new car, obviously without any defects, stumbles along the way, is known to experienced drivers of vehicles equipped with an injection system. Why does the car jerk when the injector moves, what are the reasons for this? This will be discussed in the article.

Causes of malfunction

Troubleshooting is an incorrect air-fuel mixture ratio in the combustion chamber or a lack of spark. In this case, the crankshaft may turn with difficulty, or there will be misfires.

Many car enthusiasts started with carburetor engines and therefore know perfectly well why the engine misfires, but not everyone can fix the problem because they don’t know what the problem is. It is worth understanding that the tripping effect occurs due to a disruption in the supply of one of the elements - air, fuel and spark. It is in the systems that are responsible for these elements that we should look for the cause.

So, let's look at the components where you should look for the reason why the VAZ 2109 engine with a carburetor injection system is tripping:

Carburetor.
Fuel.
Fuel pump and filter.
Spark.
Air filter.

Let's sum it up

So, we see that a car can jerk for many reasons. As a rule, it helps to alternately replace consumables (filters, spark plugs, armored wires) and clean the injector nozzles. It is better to entrust the check of electronics and sensors to a specialist at a service station.

Often the problem can also lie in the transmission; the car also “jumps” in this case - especially with an automatic transmission, although manual transmissions are also prone to failure. In a manual transmission, replace the basket and/or clutch disc.

The automatic transmission checks the oil for its level and quality. Please note that qualified repair of an automatic transmission “in a garage” is impossible; it must be diagnosed at a service station.

The benefits of taking radical action

To the desperate question of what to do in this deadlock situation, when no matter what you do, the VAZ 2109 injector still twitches when driving, two answers are possible: palliative and radical. A palliative response is a half-measure that temporarily provides a way out of a difficult situation. It does not eliminate the essential cause of the problem, does not fight the roots of the problem.

Such a palliative could be contacting a service station. The master will kick the ramp, move the high-voltage wires, raise his eyes to the sky... Maybe he will conduct computer diagnostics. At best, it will replace the spark plugs and fuel filter. If the outcome is favorable, you will even drive your VAZ 2109 carburetor or injector for several thousand more kilometers. Under certain life circumstances, such a palliative option makes sense.

But seriously consider taking radical action. Be smart: sell your “nine”! Unreasonable malfunctions are the strongest argument to part with your car immediately. A car should carry its owner, and not give him food for thought while driving. A modern person has a lot to think about even without a “nine”. Don’t waste your life struggling with problems with acceleration in a twenty-year-old domestic car - you risk wasting your life entirely, without a trace.

The only time it makes sense to fight for the performance of your nine is when you know why it actually twitches while driving.

In the vast majority of externally determined cases, this is low-quality fuel. If for some reason you happen to fill up the tank at an untested gas station and after a short time the car starts to jerk, it’s a problem with the fuel. You have a choice. The twitching can be tolerated as long as it is not too severe. In this case, you should use up as much fuel as possible, then fill the tank at a reputable gas station and continue driving without problems. If you don’t have the strength to endure the jerking, stock up on a long thin hose, drive the car onto an overpass, suck it up, drain the fake through the hose, fill it with high-quality fuel and drive calmly.

Take care of those you have tamed

Don’t be fooled by the cheapness, fill in with high-quality fuel and go ahead.

A situation where a car starts to jerk for no reason can occur to every car owner several times a year. In most cases, the problem can be resolved quickly. At the same time, you need to understand that the maximum wear of some machine components can lead to a major overhaul of the affected systems. If the car stalls while driving and jerks with a loss of speed, then it’s time to take action.

Communities VAZ Repair and Improvement Blog I drove and drove and suddenly began to twitch. 2109 carb.

Friends, please help me with advice. My car was driving normally, I would even say good, and suddenly, when starting from a traffic light, it began to twitch. Somehow I switched to the second one. I press the gas smoothly and the twitching stops. As soon as you press the pedal to the middle, it twitches again. And so on in all gears. It holds smooth at idle. 900. I accelerate on the spot, the revolutions do not float or fall. It jerks only when accelerating, if you press the pedal to a third. And also, if when driving, for example, at a speed of 40 - 60 km. h. I sharply press the pedal to the floor, it starts to choke and shoot in my carburetor. What the hell is this? I myself blame the accelerator pump or the vacuum chamber on the distributor. What do you think? Thanks in advance.