With a sharp pressing of gas, the car twitches. The car twitches when overclocking
During the operation of various vehicles, drivers often encounter the fact that the engine begins to twitch and works with jerks when harsh pressed on the gas pedal. Such, and at idle, if he is strongly pressing on gas. At the same time, in the usual mode (pressing on the accelerator of smooth) noticeable jerks are often not observed.
In this article we will talk about why such jerks occur and the car twisted during acceleration, Caica symptoms clearly indicate that the engine began to twitch, as well as to determine and eliminate the malfunction.
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Jerked the car with a sharp pressure of gas: why it happens
First of all, it should be understood that jerking and jerking when pressing gas is most often associated with the quality of the fuel and air mixture. The mixture can be depleted or enriched.
As a result, jerks and failures appear when the speed set, the car pulls in motion in transient modes. Causes and troubleshooting.
Most car enthusiasts face the problem of motor jolts with a smooth or sharp acceleration. This problem is not critical and easily repaired. Moreover, users and users are not insured domestic Vaz 2112 on 16 cl down, and owners of foreign cars in type Hyundai Solaris.. If the car twisted when the gas pedal is pressed, such aggregates are required.
- Fuel supply. As a rule, problems begins with acceleration after refueling on a dubious gas station.
- Air in the system. Extra oxygen saws can also occur through cracks or the protested clamps.
- Ignition. This topic is worthy of a separate release.
- Pressure highways. Fuel pumps, ramps, injectors, filtering inserts - blocks that require increased attention.
So, you should figure out what to do when the car begins to twitch during overclocking.
Diagnostics
The diagnostic procedure for different engine designs is performed according to the characteristic algorithm. However, general faults are available.In the process it is necessary to check the fuel system, the air supply highway, the ignition apparatus. At the same time, the troubleshooting is performed alternately for all aggregates. If the sequence gave the result, the damaged node changes to the obviously good (new).
What to do
In the absence of knowledge or uncertainty in own powerYou can seek help for a service station, where the wizards will conduct a diagnostic inspection and fix the car.
If the user decided to independently figure out the following.
When dumping on gas, the car twisted and does not go
In the case when the car behaves predictably at idle, and when the gay is pressed, jerks are felt, and the car slowly gains momentum. The case lies in a depleted or re-entered mixture entering the cylinders. It does not matter whether it old Vaz or new modification By the type "Hyundai emphasis". The source is here here.
The secondary question is how this happens, because in 50% of cases, the carburetor or injector is configured correctly.
The car twisted when overclocking and cutting gas
Similar symptoms arises on injection foreign cars - with a strong pressing the car pulls the car. In this case, acceleration occurs in normal mode. For Ford Focus Type Machines, Opel-Astra J, Chevrolet Cruz may be in the breakdown of the ECU, DMRV, DPDZ. There is also no problem and modification of VAZ 2114, AUDI A6 C5.
The easiest way to diagnose is to replace the details on knowingly new ones. So the position sensor throttle valve May be "padded" incorrectly pointing the computer the location of this unit, which causes an alternating disclosure of the choke with all the ensuing consequences. Also DMRV may incorrectly interpret the indicators that it will cause a depletion of the mixture.
When you click on the gas pedal, the machine is tupit, then sharply twitch
When transport is tupitted on acceleration, followed by a sharp jerk and further the dynamics stabilizes. It is necessary to check these elements:
- air mains;
- pump accelerator;
- fuel quality;
- main fuel pump;
- ignition settings;
- mRV sensor.
With the problem of refusal fuel pump Periodically faces the owners of the car "Lada Priora". Here it will be enough to change the element of the new one, to clean the line to clean the highway (there could be a poor-quality fuel).
Also in some cases, the engine begins to trim, and then accelerate. The DMRV transk is performed here, the diagnosis of spark plugs, checking the ignition angle, blocking the nozzles.
Additionally, in the presence of automatic box Transmissions, it is necessary to check this mechanism. About 20% of the visits to the car service with similar faults end in the "treatment of surprise" inside the torque converter.
The car is twitching on the go with a small press on the gas pedal
A more exotic malfunction when the car begins to twist the car to press the car before entering certain revolutions of the power plant. There is a shortage of a combustible mixture in float chamber DVS - gasoline burns faster than he has time to do. This side effect of faulty fuel pump, the unit does not have time to pump up a new portion of the mixture, which provokes the shocks of the motor.
Note! On independent structures, it seems to be a carburetor eye or injector "Lanos" breakdown in 90% of cases the same manifests itself, which narrows the search area.
Twitting cars when pressing and resetting gas
If, when resetting revolutions, the car begins to peel the nose, and during the acceleration jerks again, there may be two sources.
- Failure of sensors. Faulty sensors are sent to the ECU with incorrect data, provoking the violation of the uninterrupted fuel supply.
- Zoom dosing elements (nozzles, jets). With such a problem, the owners of classical models of type VAZ 2107 are often encountered. The scored nozzle after the gas reset is "spooled" part of the fuel, which causes an increase in revolutions. With a sharp acceleration, the element does not have time to submit the required amount of the mixture into the cylinder.
Carburetor car twisted when pressing gas
When a problem is detected on carburetor vehicles of type VAZ 2109/2106. First of all, it is necessary to pay attention to the fuel supply system. The design of standard carburetors "Solex" has exiting tubes designed to supply gasoline to the formation chamber of the mixture. Through the pouring of low-grade fuel, thin channels can be scored, which prevents its free passage.
The channel is usually littered by the first chamber. If, during a set of speed, the engine twitches, and after the exit to 2500-3000 rpm acceleration goes smoothly - the trouble is here.
The elimination of the defect occurs by blowing the unit with compressed air with preliminary cleaning of the jets (just in case).
It is also necessary to check the main pump (sore of the whole classics), and the moment of ignition.
When pressed for gas, the machine with an injection motor twitches
If the VAZ 2110 is twitching injector, the search for a problem is to start from the MRV sensors, PDZ, ECU. At the same time, faulty sensors can feed the false signal to the control unit, which is the source of trouble.
The next reason is the zoom of the nozzles. Usually the symptoms are manifested 15-20 km after refueling the poor-quality fuel in an empty tank.
The last moment is a refusal, ignition interruptions. Candles, armofotting are diagnosed.
When pressing the gas, the diesel car twitches
Regarding a diesel engine, the solution to the problem is extremely simple - jamming the movable blades of the main pump. The cause of this phenomenon is considered a long-term simple transport in raw place. It is moisture that oxidizes metal surfaces, which leads to the encoding of the structure.Elimination of the breakage is performed by replacing the damaged part.
conclusions
Regardless of the specified primary sources, the main problem The breakdown is the human factor. To prevent problems with the car, it is necessary to undergo service procedures in a timely manner, inspections and use only high-quality consumables.
The car malfunction can manifest themselves in different ways, most often these are foreign noises, such as knock or creak. But, sometimes the faults have more noticeable symptoms, for example, the machine can be rejected from the course specified by the driver or twitch when overclocking and speeding. In this article, we will look at the last option, namely why the car twisted when overclocking and what to do in such a situation.
All exploited now cars from petrol engines Equipped with or oriental, or carburetor power units. The second type of DVS is considered to be now hardly "rare", but in Russia (especially in the province) "on the go" there is still a lot of such equipment. Therefore, consideration possible causesfor which cars They can twitch and accelerate jerks, it makes sense to start with them.
Carburetor engines
These power units compared with more modern, injection, easier by design, all of them " weak spots»Perfectly studied, and therefore find the reason for their unstable work At the stage of starting and overclocking the car is not so difficult. Experienced Motorest Specialists with Knowledge of the case claim that cars with a carburetor engine are most often twitching due to such problems as:
- Pollution of the fuel or air filter;
- Problems in the operation of the fuel pump;
- Fault fuel pressure regulator.
Thus, the owners of cars with carburetor engines whose machines began to twitch when the motor startup and acceleration should, first of all, check those details, nodes and units that are listed above.
If it turns out that everything is in order with them, then you need to pay your close attention to the ignition system. IN carburetor engines Its malfunctions are also often caused by jerks. Practice shows that in cases where the accelerator pedal pressing the machine refuses to accelerate (as the chauffs say on their professional slang, "fails"), it makes sense to test the ignition coil, as well as connected to it high voltage wires.
It often finds that these details begin to "break through", and therefore the Troit engine. Troubleshooting in this case is to replace the faulty part.
Another fairly common problem is a banal nagar in the candlelight. It leads to the fact that the spark arises not when it follows (and sometimes it does not occur at all), which leads to the turbines during acceleration. Exit this situation is cleaning or replacing the spark plugs.
Injector engines
Gasoline power units of this type have significantly better than carburetor, operational and specificationsHowever, their design is much more complicated. Accordingly, the reasons due to which the machine can twitch during acceleration, much more.
The main feature injector motor It is that a special electronic unit is engaged in adjusting the supply of fuel mixture in its combustion chamber. In this process, several sensors are involved, namely:
- Throttle positions;
- Mass flow of air;
- Regulations crankshaft.
The malfunction of any of them may be the reason that the machine is twitching when the engine is started and acceleration. It is interesting that in case of serious problems with the crankshaft position sensor injector system It is often disconnected completely, and then you cannot start the motor at all.
It goes without saying that the reasons for jerking during the acceleration of cars equipped with injection engines can be the same as the carburetor engines, that is, blocks of filters, candlelight problems, ignition coils and high-voltage wires, as well as elements fuel system (including clogging of fuel injectors).
It should also be noted that one of the common causes of car jerking at the engine start and acceleration is the use of low-quality fuel. As a result, the depleted fuel mixtureAnd the engine begins to work very unstable, in particular, jerks appear during acceleration. This equally concerns both carburetor and injection force aggregates.
What if the car twitches when overclocking?
In order to accurately diagnose the cause of unstable work gasoline engine internal combustion, expressed in jerking when starting and overclocking, first of all, it is necessary to make sure that high-quality fuel is used. It is necessary to check its density, octane number (the corresponding devices are now sold in specialized stores and costs quite inexpensively). If it turns out that the reason for the jerks during acceleration is precisely in a bad stuel, it simply does not need to be used.
You also need to check the air and fuel filters. What they are contaminated is usually visible to the naked eye. The problem of eliminating the problem is to replace these supplies on new ones.
To check the candles, it is necessary to simply remove them and subject to visual inspection. If it turns out that they have a nagar, then it should be removed or simply change the candles to new ones. As for coils and high voltage wires, most often the cause of their malfunction is the oxidation of contacts. To reveal it, the easiest way to use the multimeter and "ring" the chain. Faulty ignition coils and high-voltage wires should not be repaired, but replacing new entirely.
As for the sensors in injector enginesThe usual oscilloscope is used to check them. If this component is working, then the screen shows the impulses indicating the operation of the injector. In cases where there are no or they have an irregular shape, sensors should be changed to new ones.
Video about jerking during acceleration
To whom from motorists did not have to face in their practice with the car of the car, when the gas pedal is pressed. It would seem that there are no good reasons for this, but the car seemed to be replaced. Which is characteristic, such unpleasant rods of different intensity are manifested both on and during the movement of the car. Therefore, each driver must familiarize himself with the advice of experts who will help to figure out why the car is twitching when the gas pedal is pressed and how to eliminate this defect. It is useful to know not only in highly angry car enthusiasts, but also those who have a lot of experience of the machine's operation.
Why can a car start twitching
Before treating any illness, it is necessary to carefully understand its true causes that for some reason provoked a parable and promote its development. Similarly, with the car. So, it will be possible to eliminate malfunctions only when it becomes clear, because of what they arose and why literally in the exact location of the car begins to twitch. It seems that the engine that became a naughty engine suddenly began to work as if by himself, completely cease to obey the will of the driver and moving the gas pedal, which had functioned immaculately before.
Analysis of lively automotive practices, complemented by the opinions of well-known experts, gives a wide picture of key causes why the car suddenly began to break. The prevailing opinion is such - the main reason, as a rule, is a problem fuel mixture. When in it for various reasons, a shortage of air is created, the engine begins to react to it and flush. So, the crankshaft does not stop his rotation, although the gas pedal has long been released.
Especially tangible junctions are fixed if you press sharply on the pedal. In turn, the problematic depends on several essential factors, including some devices and motor assemblies associated with unsatisfactory operation.
If you have an injector
As the experience shows, one of the root causes that cause the problem of the fuel mixture is the DMRV - the special sensor is existing in the injector vehicles, designed to adjust the mass consumption of oxygen in the engine system. If this device is faulty or operating in abnormal mode, the air into the fuel mixture will be supplied with gross violations of the required norms, and periodic jerks of different power will arrive in the engine.
If it periodically occurs when the gas pedal is pressed, the reasons are definitely clear and the output consists only in dismantling and the complete replacement of this sensor is good.
If you have a carburetor
When the car is not injector, but, the main cause of the engine of the engine is often the malfunction of the carburetor chamber. We had the case with her experienced drivers It is well known that it has a tendency to clog the inlets, structurally located in the first cameras.
If they are clogged, the fuel mixture is forced to enter the engine, grabbing a portion of foreign substances along the way (GAR, Metal chips, etc.). The composition of such a mixture, of course, ceases to respond to the range of the necessary standards. The result is also disappointing - the gas pedal is released, and the car twitches.
For the same reason, the accelerator twisting with a sharp pressure of gas is observed. Here you can successfully solve the problem independently without resorting to replacing the carburetor chamber. To do this, it is enough to remove the carburetor and capitally blow its holes and the nozzles of a strong jet of compressed air.
If you have a diesel
When the diesel engines, the cause of their jerggy, mainly, becomes the jamming of the pump blades. At the same time, almost always the initial push, the series of jerks marks. It has been proven that such a negative effect is provoked by the rust-eyed in fuel. It happens if the car has fallen in front of this trip for a long time. The recipe for exit from the incident position is the additive of a special additive, after which the TND will start working softer.
It is also worth noting other typical and fairly widespread reasons for sudden deviation. car Engine From the usual format of its work:
Perennial Car Operation Practice different models helped drivers to develop several effective action algorithms when jerking the machine. One of the most common is to alternately check the integrity of the wires and the ignition coil, then. If they are working, filters change in the system. In the case of a carburetor motor, it is analyzed if the ignition rate is responsible. If the engine with the injector is checked, whether the nozzles are not clogged, etc.
The incomprehensible manifestations of Döganya began at the car in no way underestimate, naively hoping that they would pass by themselves. Such a misconception will soon be able to lead to a very serious breakdown of the motor and its complete failure. To address the problem has arisen immediately, moreover, with the help of experienced professional professionals.
From time to time, each owner of the car faces the situation when the vehicle begins to twitch during the start of the movement when the gas pedal is pressed or driving on small turns. This behavior of the machine is often caused not too serious violations in the work of the engine and other systems. However, diagnose and eliminate them is needed in the shortest possible time. Otherwise, they can lead to a difficult breakdown, to eliminate which will leave a lot of time and money.
When can the "jerking" of the car and what causes the phenomenon?
In the overwhelming majority of cases, the symptom in the form of an unstable car driving can be diagnosed in the following situations:
During the start of the movement of the machine (starting from the place).
During slow motion with small turns of the engine.
If necessary, sharply accelerate while driving on the road.
During work power aggregate on increased turns.
In addition, the described behavior of the car can manifest itself in other modes of operation. The reason for this may be the problems of the following systems and nodes of the machine:
1. The fuel mixture system to the combustion chamber.
2. Ignition system.
3. Incorrect transmission operation.
4. Violations in work electronic block Car motor control.
How to eliminate faults?
Consider in more detail the main and auxiliary systems of the car that can cause "twigs" vehicle During ride. And also focus on how to eliminate diagnosed problems.
Fuel mixing system
Quite often, the cause of the unusual behavior of the car during ride is the wrong operation of the fuel supply system to the engine or the fuel-air mixture injection system into the combustion chamber. In other words, DVS can not get necessary number gasoline or diesel fuel. As a result, the shaft is not enough to convey the mechanical force of the suspension, and you get sick in power.
To get rid of trouble, you need:
Check the operation of the throttle node.
Test sensor performance.
Check the correct position of throttle dampers.
and RHX
Check the efficiency of the mass flow sensor.
check
In most cases, the defect is found in that are responsible for the fuel mixture injection. Less often uneven ride is associated with air channels that connect the injector and. It is possible to depressurize, which leads to loss of pressure.
Correct the found problem can be replaced by replacement damaged parts. You can do it yourself, but it is better to seek help from the service center specialists. After the work, it is important to additionally check the tightness of the compounds on all fuel and air lines.
If your machine is equipped with a carburetor, you need to check the valve idle moveAnd also make sure that the device's housing itself does not contain cracks, chips and other defects.
Ignition system
The next prevalence is the reason for the "jerking" of the car - breakage in the ignition system. This leads to the fact that the fuel mixture in the cylinders flammifies not at the right moment. In addition, it can occur and due to the fact that a low voltage current is supplied to the candles. And the arising spark is not enough to inflaming.
To diagnose faults, check:
Commitment service.
Often the car can ride jolts due to the physical wear of the spark plugs or due to the fact that the candle clearance does not match the necessary parameters.
Transmission
"Derganje" can occur and due to the fact that the transmission elements are not operated in accordance with technical Regulations. This happens, for example, if in the gearbox (especially automatic) did not change transmission fluid. And when the mileage of the car will be 150-200 thousand km, it is necessary to repair automatic transmission, otherwise the car will go with small jolts all the time.
Maintain the maintenance of such a complex unit as a gearbox, better only in a specialized center. It is possible to take for work on your own only if you know exactly what and how to do.
Accelerator
We will deal with the situation when "Dergali" arises due to too sharp presses on the accelerator pedal. In this case, the engine sharply increases its turnover, which can lead to improper operation of vacuum ignition angle regulators. When moving the car on small circulation, the engine, the DRC is placing that it leads to the shock.
In case of improper work of vaccum regulators, when the gas pedal is pressed, the engine motor cannot increase the speed on time, and this, in turn, leads to problems with the work of the throttle. As a result, the air-fuel mixture does not have time to burn, which damages the bearing, on which the ignition advance angle depends.
To diagnose the problem, you need to check the vacuum regulators. For this, the hoses and nozzles are disconnected, after which the holes are covered with their hands. During the operation of the OH, you can clearly hear the retractor effect. If the vacuum is not formed, the tightness is broken and the node should be replaced.
If your car moves jerks, you should immediately identify the cause of the problem and eliminate it.
