The engine turnover disappear. Engine speeds are not falling at idle: we are looking for a reason and correct. Floating Injector Engine Rolls

the main / Purchase \\ Sale

Hello, dear friends! By exploiting their car, almost every driver faces certain difficulties and problems. Someone , Outdoor Tosol boils, and thirdly and at all do not fall the engine speed at idle. Between O. last Situation We are talking to you today.

This is a widespread malfunction at which the engine is constantly holding turns. Leaving the motor at idle (XX), the tachometer arrow does not want to fall down.

Such situations are found practically everyone, who has an injector and carburetor, diesel and gasoline engine under the hood. At the same time, the causes for injectors and carburetors are different. Let's look at them and look more carefully.

How to determine the presence of a problem

First you need to understand how you can independently determine the increased or simply abnormally high revs on own cars. After all, even at idle a certain level of revolutions, it must be consistently supported.

In practice, determine the sharply appeared problem is quite simple. Even in those situations when he has a newcomer, and he has no special experience in such matters. First of all, you can just listen to dVS work. The lower the engine turnover, the quieter in the end it will work. But it is even easier to diagnose the problem with which is installed on the overwhelming number of passenger and trucks. Look at the position of the arrow and fix what kind of turnups you see when driving in a measured, calm pace, and that the device shows after warming up or when the gas is discharged.

Depending on the engine, for each power unit there are turns of revolutions at idle. This is usually from 650 to 950 rotations for a minute.

Now look at the instruction manual. There are necessarily indicated parameters of the norm for the XX. If current values \u200b\u200bdiffer from the indicators from the manual, this can be considered a deviation. That is, you need to start looking for a provocation factor.

Owners of injection engines perfectly helps onboard electronics. If the turns on the XX turn out to be higher than the manufacturer of the norm, on dashboard Surely the engine check light lights up. Here I advise to look into our material where we talked about and their meaning.

Possible consequences

Similar phenomena are found on a large number of cars. Almost any modern and fairly old engine is able to present to your owner such a surprise. It can be:

VAZ 2109;
Renault Logan 1.4;
VAZ 2107;
VAZ 2110;
Chevrolet Sens;
Mitsubishi Lancer 9;
Niva Chevrolet;
VAZ 2114;
Kia Cherato;
Chevrolet Lacetti;
Chevrolet Lanos;
Toyota Corolla, etc.

It would seem, well, revolutions rose, but nothing is happening.

In fact, the engine can occur the processes initially invisible to the driver. But gradually the consequences will be apparent and often frightening their cost of recovery.

It is impossible to leave the speed of revolutions at idle.

This can be explained by several basic possible consequences.

Here we are talking about such potential problems:

The fuel consumption will constantly increase, which will negatively affect your budget;
The hot engine leads to problems with the cooling system and a general resource reduction;
Often fuel tritely will fly into the pipe, which threatens him also detonation in the exhaust system;
Will begin to reduce the overall resource of the power unit;
A node will suffer with which the increase in revolutions is associated.

The reasons are quite a lot in order to promptly take measures and eliminate the provocation factor.

Falling turns on carburetor engine

Despite new environmental norms, in our country, the number of cars with carburetor engines is quite impressive.

If you have noticed that on this engine, the turns are held on a sufficiently high mark at the XX, the reasons can be wounded in the following:

The idling system is incorrectly adjusted. If recently interfered with it, be sure to check the current setting;
Problems with . The increase in idle speed can be due to its improper closure. Check the damper on the subject of nagar. Anxiety is still possible or crack. Here only replacement;
Needle valve. Cause in its location. It is possible when an incorrect dosage of fuel falls into the chamber;
Block head gasket. She tritely struggling. Will have to change;
Success is open. To check, you need to evaluate the work of the damper in the primary chamber. If there is a problem, check the support of the supply. Usually the problem is solved by lubricating the drive and cable.

These reasons are most often manifested on cars with carburetor enginesWhen at idle turns remain in a long high level. They are potentially considered in situations when the engine Almost immediately.

There is one more option, current for carburetor and injectionboxes. Here we are talking about sticking gas pedals.

Problems on the injector

Separately, it should be considered situations, due to which the XX turns can increase on the injection types of engines.

Unlike carburetor engine, where all the problems lies in the mechanical part, the injector has a high probability of electronic faults.

Disruption of performance or failure of the sensor controlling the temperature of the coolant. This is the drive K. permanent work In the heating mode of DVS. Need a diagnostic scanner and probably replacing the controller;
Violation of the work or breakage of the XX sensor. He is a sensor mass flow air. Diagnosis will help special equipment. Exclude a wiring break using a multimeter, replace the node as necessary;
The same problems, but already with the throttle position sensor. I.e throttle valve. The controller either jammed, or he broke;
Return spring flap. It can stretch or jump, causing the appropriate behavior of the motor at idle. The node returns to the place or changes to the new one;
Hall The throttle valve cable. Actual for old cars. Replacing or lubrication will help solve the problem;
Sealing gaskets on nozzles. They are damaged not so often. Diagnose the problem is difficult. Tested usually last.

Be careful, running And watching the behavior of the tachometer in his car. If you see that the turnups float, rise to abnormal marks and behave uncharacterously, do not ignore such symptoms.

It is necessary that all power unitsystem systems work properly. In this case, the engine must work normally both under load and in idle mode.

In practice, often the drivers face a problem when the engine turnover is not falling or falling with a large delay after discharge gas. It is obvious that overestimated idling Indicate problems and are the cause of increased fuel consumption.

In this article we will talk about why motor turns do not fall, as well as consider the main reasons why similar problems arise on and auto.

Read in this article

When resetting the gas, turns are increased or "hang": common malfunctions

Let's start with the fact that on many cars with an injector during heating the turns raises. It is necessary in order to force aggregate Stably worked after a cold start.

However, after increasing the temperature, the control unit lowers the turnover of XX, bringing them to normal. On many cars with a carburetor, the driver independently increases the revolutions during heating, using the so-called "SUPPLC".

At the same time, after the engine is heated, the idle speed is normal, on average, 650-950 rpm. If you click on the gas and release the accelerator, the turns should be increased, after which it is again dropped to the specified values.

It also often occurs when the momentum is slowly reset or constantly held at a mark of 1.5 thousand rpm, 2 thousand revolutions, etc. Expensely, in such cases, the flow rate is increasing and is stronger than the DVS, which indicates the need for diagnostics.

So, let's start with frequent problems Carburetor. Often the engine speed is not discharged due to the problem with the throttle. For example, when the driver presses the gas, the damper must be opened wider so that more air to burn the fuel in the cylinders. After the gas pedal is released, the damper is closed, revolutions are reduced.

If the damper does not close to the end, the re-entered mixture is incorporated into the cylinders, revolutions are increased. The reason may be strong pollution of the throttle node or damage to the damper itself (deformation). To begin with, clean the flap, the liquid for cleaning the carburetor is suitable as a cleaner.

We also note that the damper is closed and in the case when the drive cable is worn. In this case, the cable is subject to replacement. On carburetor machines do not fall engine speeds often and in the event that the gasket between the carburetor and failed. Also, the culprit may be an intake manifold, which has damage.

The main task becomes the right ratio of the amount of fuel and air. Often high level Fuel in a float chamber of the carburetor also leads to increased revs. Check should be started with a needle valve.

We now turn to the injector. Pay attention to many injection cars. As for malfunctions, the injection system itself is more difficult, that is, the causes of high revolutions are more compared to the carburetor.

As a rule, circulation problems can be caused by malfunctions of both mechanical elements and electronic components. In the list of major malfunctions, experts identify disorders of the temperature sensor, which is installed in.

Simple wordsIf the specified sensor supplies an incorrect signal, the ECU believes that the engine is cold and the warm-up mode. In this case, the control unit raises the momentum so that the power unit worked stably and faster to operate.

Also, revolutions problems may begin due to problems and failures in the work (idle regulator). It also happens that the throttle cable is hired and twisted. Another spring that closes the throttle can stretch or cause damaged.

Separate attention should be paid to the gaskets, since the air drums can lead to the fact that the mixing formation is disturbed. This means that you need to separately inspect the laying of collectors, nozzles seals, etc.

Floating turnover: Causes

Note that in some cases, the turnover is not just slowly falling or kept at one level, but "float". In this case, the engine can work unstable. First fall, then grow sharply and everything is repeated. Frequent cause of such a phenomenon is the supply of excess air, which leads to the "jumps" of turns on the XX.

Such problems arise in case of failure of the air supply sensor (), which allows the ECU to calculate how much air has been received and how much fuel is applied to prepare the necessary mixture.

If the failures arise, the control unit cannot prepare the "correct" mixture for the XX mode, which causes speed jumps after the release of the gas pedal or during the operation of the motor at idle.

Let's summarize

As you can see, to accurately determine why the engine turns are not reset, in many cases there may be in-depth diagnosis. For carburetor engines, cleaning and adjustment of the carburetor itself is often needed, while for the injector it will be necessary.

If the problem does not lie on the surface (zakis the valve cable, after washing or dry cleaning, the mat is incorrectly laid in the cabin, which presses the gas pedal, etc.), then it is better to deliver the car to the service.

The most difficult situation is such when it assumes the presence of a large number of sensors and actuators. In this case, even use diagnostic equipment It does not always allow you to quickly and accurately determine the problem.

If the diagnosis is difficult to optimally deliver the car to such a service that specializes in the repair of a particular car brand. As a rule, these are official dealerships, less often you can meet third-party organizations.

Finally, we note that the timely detection of the problem allows you to save other nodes and aggregates. In other words, high curvatures of XX, speeding turns and jumps indicate that there are problems with air / fuel supply or with mixing formation. Ignoring such problems negatively affects the engine and the service life.

The origins of the unstable engine work on the XX

How will the picture be folded if the control unit does not receive data on the number and amount of air consumed? So, for example, the throttle sensor reaction will be the following - the frequency of revolutions will initiate, but then the fuel mixture will begin to be poor, as a result of which low speeds are installed on the hot engine. The reason for this one - the amount of air consumed by the motor has decreased.

However, it happens on the contrary - the fuel mixture is enriched, and the engine begins to gain momentum again. Such cycles can be alternate infinitely, these are floating momentum. Especially relevant the problem of low idling turns on a warm engine in winter.

On some cars, events can develop and differently - the turns grow, for example, up to 2000 rpm, and so remain. The reason is that the injector injected elevated portions of fuel. The amount of air does not grow, otherwise the engine could raise the turnover and up to 3 thousand, however, then it would still be stupid.

Fuel quality

When idling speeds are falling on a warm engine, you should not remove the fuel. It is possible that the problem is not connected with electronics, sensors or executive mechanisms. Maybe the thing is that the driver fills more low-octane gasoline, and the ECU is calculated on high-octane brands. Hence the depleted mixture, so the control unit remains nothing, how to work like this.

Possible reasons

So, because of what does this problem arise? Some of the most vulnerable links in injection engines are sensors. One of the elements that directly affects the operation of the engine and its quality is an idle sensor. Often find it is possible near the throttle. it stepper electric motor with a conical locking needle. When the choke is closed, the air falls around the damper along the idle channel, which overlaps the needle.

Another culprit that very low idle speed is air - the second important component for cooking fuel mixes After gasoline. Therefore, if the mixture is quite poor, it is still a big turnover.

When failures arise in the system, the ECU cannot correctly choose and calculate the proportions of the fuel mixture in XX mode. As a result, the engine work will be unstable, the turnover will begin to fall and climb.

The less common problem of low idle speed on a heated engine may be improper operation eGR systems, More precisely, its valve. The element is installed in the intake manifold and its function - the output of exhaust gases. This is nothing more than a periodically sensor must be cleaned.

It will not be superfluous to make sure that there is no air supply in the system and check in what condition is the throttle. Often the problem of low revolutions can be associated with a dirty damper or mechanical damage, deformations. It often happens that for one reason or another, the flap jars - hence another cause of low revolutions.

Why die sensors?

Experts identify two reasons for low idle speed. One of them is associated with low fuel quality. Often understated octane number Not only very much pollutes the working surface of the sensor, but it may also cause various disorders in the electronic blocks.

In addition, often the sensors fail because of a banal marriage or exceeding the work resource. Inexpensive sensors may well be low-quality or defective. That is why low idling speed appear on a car.

How to exclude air seats?

In order to exclude or confirm the sublicas into the system of excess unaccounted air, check the tightness of the air supply system.

To do this, you can remove the air pipe and pour into it from the compressor or pump. The hose can be placed in water. So it turns out to identify cracks and other defects.

How to check the idle sensor?

To check the performance of the sensor, it is recommended to use a multimeter. The verification procedure is very simple. Replace resistance between contacts in the sensor block. It is important that the ignition is included. Resistance between different vapor contacts should be from 39.5 to 81 ohms. If during measurements the multimeter issues other readings, then the sensor should be replaced.

Checking DMRV

So, first for checking include ignition. Multimeter need to check the tension. Measure it between contacts with green and yellow wire. On the different cars Voltage can vary from 0.9 to 1.2 V. You can determine the output of the mass flow sensor of the air and appearance Candles - Black Coal Nagar says it is better to replace it.

How to Clean the idle regulator (RXX)?

When there is a problem of low idling speed on a heated engine, in some cases it can be washed with flushing dhh. To do this de-energize the car. The controller is located on the throttle node below the DPDP (throttle position sensor). It is necessary to prepare a clean rag, a screwdriver, a liquid in the aerosol can be prepared - it can be any means for cleaning carburetors or injectors.

Cleaning begins with dismantling - to remove it is enough to unscrew the fastening screws. Sometimes there are bolts. After the sensor managed to remove from its landing place, you can start the cleaning process. The work is carried out with the help of a vein treated with a liquid from the canister.

It is also necessary to sprinkle from the sprinkler on the needle. The latter on various models of the car can be both metal and plastic. The cleaner will not spoil plastic. But the liquid should not get under the spring. If it still happened, it is recommended to blow the sensor with compressed air as quickly as possible. If this is not done, then the liquid will wash inner lubricantthat will cause full of you stroke RHX out of service.

Conclusion

As can be seen, only a few sensors can provoke low engine speeds at idle. But even one small element can significantly spoil the life of the car owner, especially if the turnover is not always falling. But this is not a problem, because this question can be solved easily, without large capital investments.

Unstable idling speed or their absence - one of the most common problems with the engine, to solve the most different ways

Engine

One of the most common problems with the car engine is unstable idling speed or absence. Management of such a car becomes true problem When driving in a dense urban stream. In addition to the fact that the driver will be able to learn a lot of "flattering" about himself from other participants in the movement, it can create a real emergency.

The idling system is crucial for engine operation, starting from its launch and ending with power modes, so it is so important to pay attention to her

The idle stroke system is crucial for the engine operation as a whole, starting from its launch and ending with the power regimes, and therefore it is so important to pay attention to it. Experienced motorists know what caused problems with turnover on carburetor and injector motorsAnd most importantly, how to "treat" these unpleasant car "diseases".

System of idle

Early issues had a dependent idle, and, by virtue of its design, practically did not give any problems with the cost of idling to their owners.

However, the times when the liter of gasoline cost 9 kopecks, and the bottle of mineral water - 10, ended, became relevant fuel economy. She, in fact, contributed to the appearance of autonomous idling, implemented, mainly in order to reduce fuel consumption.

The appearance in the design of the autonomous idling carburetor has improved the requirements for the purity of fuel, and also complicated the maintenance of this device. The filters for cleaning fuel began to enter the power supply system, since their absence has become directly to affect stable work Engine.

If on the early carburetors to install idling enough was a special screw to a certain angle, now everything is complicated. The idling has been highlighted in a separate system, with its channels and gibrels responsible for feeding and dosing fuel and air. In addition, an electromagnetic idling valve that works only in the presence of power on its winding appeared.

The idling system was complicated, which reduced its reliability, as now any sortiene or hairs in fuel can lead to interruptions in the engine or even to its complete stop.

The carburetor, equipped with an electroclap of idling, is more economical according to fuel consumption, but less reliable in terms of the stability of this very idle stroke. This is due to the fact that at any time it can clog fuel jackler, located in the valve, can also disappear power supply electroclap.

Unstable turnover and causes of their occurrence

Unstable engine speeds can be caused by the throttle of the throttle, mainly due to its non-return to its original position. Most often, the reason lies in the faulty mechanics of the damper drive, or in a large number of deposits on the inner walls of the lower part of the carburetor.

In this case, you need to check the throttle drive elements and clean the throttle assembly. The actuator is better to check with the assistant: the assistant must be smoothly pressing until it stops the gas pedal, and the driver is to trace the throttle lever of the throttle. The flap should take a vertical position and return without jams in its original position. If the secondary camera drive is mechanical, then at the end of the progress of the first chamber, the valve of the secondary chamber must be opened, and then return to its original position.

When the assistant will drown up to the end of the gas pedal, you need to check full throttle drive lever, trying to choose a lever in extreme position. If the lever has a move, then it is necessary to achieve its full move from the gas pedal.

When the damper is observed (they are closed with jerks or not completely returned to its original position), the carburetor must be removed, disassembled and clean the throttle body.

If the car is operated predominantly within the city, then the valve of the secondary chamber may generally be flared, since, mostly, the movement in the city is carried out at the first chamber. Do not try to make power for its development. For these purposes, there is an aerosol "Cleaning the carburetor", perfectly coping with this work.

With this, the product is cleared and throttle assembly on injection motors. In addition, it can be applied, without disassembled the carburetor: when the air filter is removed, it is necessary to bore a small dose of washing into the primary chamber, while adding gas at the same time. Motor, as it were, "choose", dropping the turnover, and immediately will be reproved. Repeating this procedure 2-3 times, you can be sure that the throttle knot is washed. However, to thoroughly "clean up" in the damper housing, it is still better to disassemble the carburetor and rinse it in detail.

Floating Injector Engine Rolls

Unstable idle speed in most cases are associated with a throttle contamination or an extraneous air secession.

When pollution of the throttle node (when visual inspection Seed oil with mud) its channels are clogged and the bypass channel is not completely overlapped. The throttle node is removed and cleaned.

With an outsider air secession, the mass flow sensor provides incorrect data that adds, then reduces the amount of fuel to align the mixture ratio. Turns, respectively, then fall, then rise. Sumprze is detected by careful inspection of the air supply channel.

"Quick Run" - solving a problem or an emergency measure?

Unstable engine start is associated with a malfunction or engine itself, or its livelihood systems: fuel and ignition system (with a good battery and oil corresponding to the season).

Many use the means to start the engine "Quick Run", but this is only a temporary solution to the problem. They can only be used in an emergency when it is really "delaying death like", however, at the first convenient case, it is necessary to find and eliminate the reason for the unstable startup.

The "Quick Start" means contains a large number of easily flammable fractions and contributes to the rapid engine launch, which is especially effective at negative temperatures.

Use the "Quick Start" tool is as follows: not running the engine, injected the composition in the intake manifold or primary carburetor chamber, and then run the engine. If necessary, repeat the procedure.

"Quick Run" can be used to diagnose the power system. When unstable revolutions are observed, interruptions in the motor operation, it is necessary to injected the composition in the intake pipeline. If the engine is stabilized, there are malfunctions in the system. When the changes are not observed, the ignition system or gas distribution system is faulty.

Ether use to run a motor

To start the engines, the launch of the -dethyl ether is also used. The ether has a high volatility and low ignition temperature (in a mixture with air in a ratio from 2 to 48%).

However, the ether is very cunning, with imperative its use (or using counterfeit ether), catastrophic effects are possible for the engine literally in the first seconds of the launch. This is due to the fact that the ether has a high combustion rate, creating huge shock loads on all elements of the cylinder-piston group. Its burning is sometimes accompanied by an explosive effect, which leads to an instantaneous breakdown of engine parts.

To prevent this, additional components with lubricants, stabilizing and reduced combustion rate and temperature threshold of the mixture of the mixture of the mixture of the mixture are introduced into the launcher.

If it happens in winter, it is necessary to take into account that the engine must be prepared for winter operation. When the motor starts on the summer oil, with a strong frost, the engine parts can simply "grab" to each other and after the start it is easy to break. In addition, the summer oil will not be able to ensure that all rubbing pairs are submitted, which will repeatedly increase their wear.

Running using the ether-containing startup aerosol is best to perform together: one includes the ignition, and the second makes the injection in the intake pipeline (moving around the corrugation with the throttle) by 1-3 pages of the sprayer, and only then starts. This will minimize shock loads at the time of the motor start.

Theoretically, the mixture is allowed to injected into the cavity air filterBut since there were cases of ignition, it is better to refrain from this method.

A good and fully adjusted engine should be launched independently without the use of any launch mixtures at temperatures up to - 35 C. Priority attention should be paid to its technical condition, and it is necessary to apply starting mixtures in the most extreme case.