The car begins to twitch when the crankshaft rotation speed changes sharply, and this happens even when the gas pedal is in its normal state. Of course, such symptoms will cause discomfort for any driver. And before you do anything, you need to identify the cause of the problem.
Diagnostics using ODB-2 scanner
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Since there are many reasons for the malfunction, first of all it is worth carrying out a comprehensive diagnosis of the car. This can be done most quickly using an ODB2 scanner.
Scan Tool Pro Black Edition
A special feature of Scan Tool Pro is the diagnosis of not only the engine, but also other vehicle components (gearbox, transmission, abs, etc.). After reading the errors, you will most likely know exactly the cause of the malfunction (problem in the pump, pressure regulator, lean fuel mixture, malfunction of one of the sensors), after which you should first pay attention to this element. The scanner is compatible with most models of the domestic automobile industry since 1993 and is designed specifically for the CIS - error codes with their interpretation are displayed in Russian.
content .. 40 41 42 43 ..Lada VAZ-2110 (2111, 2112). In second gear the car jerks and jerks are possible in first
Reasons for jerking
Quite often, while operating a car with different types of gearboxes (both manual and automatic), the driver may notice the appearance of jerks in first gear, as well as in second. At the same time, in other gears the indicated jerks may be absent. There are also a number of cases where the problem is of a “floating” nature. In such a situation, jerks appear “cold” and/or “hot”, etc.
Let us immediately note that there are several reasons for the appearance of such a malfunction, starting with the engine power system and ending with the transmission itself. In this article, we will focus on the gearbox, and also look at why the car jerks in first gear, why jerks occur in second gear, and what to look for when diagnosing problems.
The car jerks in first gear or second speed: fault diagnosis
As mentioned above, in such a situation, the first step is to gradually eliminate problems in the power supply system, ignition, as well as failures in the ECM. For example, a common reason when the car jerks at low speeds when engaging first and/or second gear is insufficient fuel/air supply to the engine or impaired mixture formation.
The result is that the engine is unstable, the unit in different modes does not have enough power to “turn” the box, which leads to noticeable jerks in movement. The culprit of the problem may be air leaks, contamination of the injection nozzles or fuel pump mesh, or problems with the carburetor. Various ECM sensors (Hall sensor, TPS, mass air flow sensor, etc.) can also malfunction. If everything is fine with the sensors, then you need to check the engine ECU. Quite often, the problem of jerking in 1st-2nd gear is directly related to the ignition. It is necessary to check the condition of the spark plugs and high-voltage wires, distributor and other elements on a particular machine.
As a rule, if the car drives jerkily, in relation to injection cars, specialists conduct comprehensive computer diagnostics of the engine. If such a check does not produce results or the cause is not found, then the vehicle’s transmission deserves special attention.
So, if your car is noticeably jerky in 1st and/or 2nd gear, it is important to understand that the transmission may also be causing the car to jerk when driving. At the same time, it is easier to determine the cause in the case of a manual transmission, while various types of automatic transmissions require more serious checks. Let's start with the manual transmission. Please note that if an inexperienced driver's car jerks in first gear when starting off, it should be taken into account that often beginners simply make mistakes when releasing the clutch, while the car itself is working properly.
To start without jerking, you need to smoothly release the clutch before the driver feels the grip point (the beginning of the transmission of torque from the engine to the wheels). After the force begins to be transmitted to the wheels and the car begins to move, you need to carefully add gas, dosing the traction with the pedal accelerator.
If an experienced driver is driving, then he can quickly identify the problem. So, on cars with manual transmissions, the gearbox itself often has nothing to do with the problem of jerking in gears when driving. In other words, in cases of gearbox failure, other problems are noted when the gears may not engage, grinding, humming, vibration of the gearbox, etc. appear. But jerking is usually caused by problems with the clutch on the manual transmission or its adjustments. For example, a car jerks in first and second when the clutch driven disc is badly worn, the clutch does not “close” completely, and slips. This leads to the car jerking when changing gears.
In this case, jerks most often appear precisely in “low” gears (first, second speed), when the smoothest possible operation of the clutch is needed and at the same time, through the clutch in these gears, a sufficiently large torque is transmitted from the internal combustion engine to the gearbox when accelerating the car.
Now let's move on to automatic transmissions. First of all, you need to take into account that the quality of operation and smoothness of automatic transmission shifts will depend on the type of automatic transmission. First of all, jerking can occur when driving with robotic gearboxes that have both one and two clutches. The fact is that the clutch of such gearboxes resembles in its design and principle of operation a conventional friction clutch of a manual transmission. Often the solution to the problem is to replace the DSG or AMT clutch, after which it is imperative to adapt the clutch (training, setting the grip point).
Also, in some cases, the culprit that the car jerks when driving in 1-2 gears may be breakdowns and malfunctions in the actuators that are responsible for the operation of the clutch in automated mode.
As for CVT variators and hydromechanical automatic transmissions, in this case, when jerking occurs, in-depth diagnostics are required. The fact is that such gearboxes do not have a traditional clutch. In this case, the automatic transmission clutch is a separate device (torque converter), where torque is transmitted through transmission oil. In this case, the gas turbine engine may well fail, which becomes the cause of jerking. It should also be noted that the automatic transmission itself can “slip”, and the quality of its operation greatly depends on the level/condition of the transmission oil (ATF fluid). Jerking in automatic transmissions of this type may occur due to insufficient or overfilled oil, the use of a lubricant with unsuitable properties, etc.
Jerking in a car with an automatic transmission in certain gears (especially during shifts) may indicate problems with the brake band, valve body, automatic transmission solenoids, sensors, separate automatic transmission ECU, etc. Taking into account the above, we can conclude that the machine needs to be checked comprehensively, paying special attention to the level of lubrication and the quality of the oil itself.
Eventually
If the car jerks in first gear or the car jerks in second gear, there can be many reasons. If we talk about the transmission, often with manual transmissions and many types of robotic gearboxes, a common cause is a worn clutch (both as a whole and individual elements) or malfunctions in the actuators responsible for the operation of the clutch on a manual transmission.
Manual transmission additives We also recommend reading the article about what an additive for a manual transmission is. From this article you will learn about the purpose and features of various additives for manual transmissions, as well as when to optimally use them. In the case of hydromechanical automatic transmissions, diagnostics are greatly complicated by a large number of sensors and the presence of a torque converter, which is a separate element. For this reason, it is recommended to carry out comprehensive computer diagnostics of the automatic transmission, as well as perform a number of tests and checks, which are carried out by experienced automatic transmission repair specialists at specialized service stations. Finally, we note that if the owner notices that the car begins to jerk in first gear, the car jerks in second speed, etc., it is better not to delay in determining the cause. On the one hand, quick troubleshooting will allow you to avoid more serious problems and costly breakdowns, but on the other hand, jerking and jerking in the first and second gears can cause accidents and other troubles on the road.
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At the start
At the very beginning of the movement, such problems can begin, and here they will be the biggest jerks.
That is, the engine seems to be late in responding to the pressed gas pedal. It may even stall completely, this will happen if the control unit gives a signal to the throttle valve to open. And there are reasons for this:
- The fuel pump is running low and it begins to hum or make noise. It is necessary to listen to the engine on the injector before starting; it cannot be heard when the engine is running, since it is located in the fuel tank. On the carburetor, the pump is located under the hood, so it can be heard even when the engine is running.
- There is a special mesh on the fuel pump that periodically gets clogged, in which case you need to flush the gas tank or change this mesh.
- The fuel filter needs to be changed, also after a certain period of time.
- The pressure regulator may fail; it is located in the fuel pump; it is disassembled and the regulator is replaced.
Of course, at the very beginning it is worth checking the pressure in the fuel supply system; a pressure gauge is used for this. It must be connected to the fitting on the fuel system and watch the indicators of the device. Full readings cannot be shown, as they will be different on different engines. One thing we can say is that readings above one are not very good. The dynamics of the device readings can be found in the car manual; it states what the readings should be during normal operation of the car.
But the readings can be too high and here you can immediately answer that the reason for this is the pressure regulator, but it is better to replace it immediately; repairs are not practical here.
Why does the VAZ 2110 twitch while driving?
Transmission device VAZ 2112 16 valves
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In ancient times, in Slavic and Germanic dialects, when denoting the number of countable objects that exceeded ten units of something, units were first indicated, and then only tens. This state of affairs has been preserved in some modern languages, in particular in German and Dutch, but in Slavic languages it has changed to the opposite (first ten, and then one), but only starting from 21.
It's hard to say why this happened. Most likely, the attitude towards the score itself played a role here. In ancient times, the discovery of each new numeral was a breakthrough for the development of human consciousness, and only then became a “matter of technology.” New numerals were sometimes described using existing ones, for example, there is an opinion that 8 was designated as “twice four,” and only then did this phrase lose its original meaning, turning into one word. Much later, already in the first millennium AD, in ancient Germanic dialects 11 was designated by the phrase “one postponed” or “one remained,” 12 as “two postponed,” and only starting with 13 they said “3 is more than ten.”
This is all a hoary story, full of mysteries, but we need to know that the word ELEVEN came from the phrase “one in ten,” which can be learned from the Etymological Dictionary:
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When driving
Here, too, not everyone will like it when the car starts to twitch in motion.
There may also be a dangerous situation on the road when another vehicle is overtaken and at that moment a failure occurs. There are also a number of reasons for this, but the above symptoms should not be dismissed:
- On a carburetor car this can happen if the ignition is set to early. This can be easily checked, accelerate immediately at 4 speeds to 50 km/h and at the same time brake sharply, detonation should be no more than 2 seconds, then everything is in order.
- In injection engines, everything rests with the car’s electrics; here jerks can occur if the mixture is too lean. But this can only be checked by specialists during diagnosis.
Second reason - Fuel pump
Unfortunately, there is no warning that your fuel pump is about to fail. The first time you notice any problems is only after the car stalls. And with this malfunction, the car cannot be started again.
The serviceability of the fuel pump can be determined by a characteristic slight buzzing sound when the engine starts. If you don't hear any noise from the fuel tank when you try to start your car, it's likely that your fuel pump has failed. Since the car will not move with this problem, all you can do is tow the car to a car service center.
Cold jerks
Some VAZ 2110 drivers say that the jerking starts when it’s cold, and when the car warms up, they disappear.
The most important reason is a lean mixture and therefore air is sucked in at idle. But it is possible that one of the sensors has failed. If such jerks begin to repeat periodically, whether idling or while driving, you need to check:
- Candles, when they are heavily sooted, they lose contact with the wires, and this needs to be corrected urgently. They should be replaced or the contacts should be cleaned and secured.
- High-voltage wires should be checked with a multimeter, and if they have lost their appearance, it is best to completely replace them.
- The ignition coil, here you need to check the armored wires and the ignition module itself. But the test should be carried out with rubber gloves, otherwise you may get an electric shock.
- The timing belt often jumps several teeth and jerking may occur when running cold. First of all, you should check the marks, and if the belt has slipped, you need to remove it and install it as expected.
- Be sure to check all the sensors on the car; if there are faulty ones, then urgently replace them.
- The filter is checked first, because the air and fuel filters are responsible for supplying a clean mixture to the car engine. Here, fuel consumption immediately increases and they need to be changed after a certain period of time.
But there are cases when everything has been checked and what needs to be fixed, but the problem does not disappear, in this situation you need to rebuild the engine, the problem may be in it.
- On fuel-injected cars, fuel injectors often become clogged; in this case, it is better to diagnose the car.
- Of course, you shouldn’t miss the fact that the car was filled with low-quality fuel, and these twitching and jerking can occur precisely because of this; it’s also worth checking the car’s fuel system right away.
And in conclusion, we can say that only high-quality fuel should be poured into the car and in proven places. After all, low-quality fuel can damage all systems in a car. In this case, you can end up with expensive car repairs.
Another piece of advice is to change all components and parts on time, and also periodically carry out diagnostics of the car and the engine separately. Troubles can happen to any car, but the main thing is to find the cause and fix the problem in time, because this is safety on the road.
We eliminate jerks when the car starts moving
According to the number of reviews from owners of a Chevrolet Niva with a carburetor engine, it is the engine power system that most often poses a problem. Due to the breakdown of absolutely any element of the system, the stable process of fuel combustion in the cylinders can be disrupted. If an insufficient amount of mixture enters the cylinders, then the car in such conditions will not be able to produce the required power. Against the background of this problem, twitching will begin to appear.
Check the pipes, determine if there is any depressurization of the system. Measure the fuel pressure. If the indicator does not correspond to the norm, then further search for the cause should be sought in the pressure regulator, fuel pump. These actions must be performed not only with the carburetor system, but also with the injection system. If an injector is installed on the Niva 21214, then in this version the ignition system is also connected. The cause of the car jerking can be absolutely any sensor that has failed. Perhaps in this case you will need the help of specialists, because all the work is complicated by the presence of an electronic unit.
