When warming the engine, turns do not fall. Engine speeds are not falling at idle: how to fix the problem. Ways to eliminate "sores"

Often drivers are interested in why the engine turns do not fall on idling. This situation is quite often found, and no carburetor engines are insured, no more modern injectors. True, the causes of malfunction will be different. But, in practice, everything can be diagnosed on their own, as well as almost on all models of cars, the problem is eliminated with their own hands without any particular difficulties. Here the most important thing is to correctly diagnose, it will significantly speed up the repair process, and will save you from additional problems and difficulties.

What it is?

Why don't the engine speed fall at idle?For a start, let's decide how to understand that the problem arose, and also let's see what it can lead to. To determine the increase in speed at idle can even inexperienced car enthusiast. It is easily felt by rumor. With increasing revolutions, there is an increase in the noise of the operating engine when the gas pedal is released. Also on the machines equipped with a tachometer, you can trace the increase in the revolutions. Almost all models passenger cars idling I fluctuate within 650-950 revolutions per minute (check the indicator in those passport of your car), all that is considered to be a deviation from the norm. Also on many injectors such a problem causes the inclusion of "Check" on the panel.

In any case, the problem should be tried to eliminate in the shortest possible time. Increased revs - the reason for increasing the consigning fuel. This increases the cost of refueling. Also, the increase in revolutions is significantly accelerating the engine wear. So it is not desirable to delay with the solution of this problem. So you will significantly save your financial resources. When identifying and eliminating the cause of high revolutions, it should be remembered that the problem can be called different faults on carburetners and injectors.

Carburetrators

To begin with, we will deal with the problem on carburetor engines. This type of food is considered obsolete, but still many cars on the roads are accurately so. Also, many motorists in their ideological reasons use such motors, and are not going to refuse them. Diagnose the source of the problem here is quite difficult, and this is taking into account the small list of elements that cause an increase in revolutions. Let's look at what should be paid to:

• Binding needle valve. In this case, the fuel enters the chamber is not dosed. Moreover, depending on the location in which the valve jammed, idle turns can both disappear and vice versa increase;
• Violation of the adjustment of the idle system. It usually occurs after cleaning or repairing the carburetor. To avoid problems, you should correctly set the ratio of fuel and air. If you have not previously done, it is better to read how it is done on your version;
• The problem is closed. There may be several reasons for such a malfunction. Most often, does not close due to the presence of Nagar on it. In this case, you will need to clean this node. Usually, it helps. In some cases, the throttle may be damaged. Then it will be necessary to change this item, but this possibility is not provided on all carburetors;
• Sometimes, the problem may manifest itself when it happens quite rarely. But, nevertheless, it is better to check. For this, on the engine running engine, open the radiator cover, with a running gasket from the neck, the white smoke will go out. In this case, it will be necessary to change the gasket;
• Open Side. Check how the valve works in the primary chamber. If they revealed the problem, then it makes sense to see how the sacrifice works. Most often, to eliminate the problem, it is enough to simply lubricate the cable and the damper drive.

Increased engine speed at idle or while driving - a sign that the motor is not in order. Such behavior of the power unit leads to an increase in fuel consumption and increased wear of engine parts. Therefore, this defect must be eliminated as soon as possible.

Description of the problem

When starting the engine, the turns rise to about 1500 rpm at idle. After warming up the engine, they decrease in about 650-950 rpm, which is the norm. If after warming up the turns remain at the same level, the motor works incorrectly.

The second option when the defect is found, this is the absence of a car fall when the gas is discharged while driving, that is, when braking the engine and riding the ride. In this case, the turnover seems to be "frozen" at the mark above 1000 rpm until the car stops complete, although in serviceable machines should fall below the specified mark.

It is easy to determine that the machine works at elevated revolutions simply. If a dashboard The car is equipped with a tachometer, then high speed is displayed on it. In the case when the tachometer is not, then the increased turnover can be determined by the sound of the engine. The more their number - the higher the tonality and louder the sound of the engine.

Main reasons

The reasons are the speed of the power unit are not reduced, differ in cars with injection and carburetor motors.

On carburetor engines

In cars equipped with carburetors, it is this node that is responsible for the preparation and supply of the air-fuel mixture in the combustion chamber. Most often, problems with elevated revolutions are associated with re-enhancing the fuel and air mixture, but other causes of malfunction can also occur.

The effect of increased revolutions can be caused by the following problems.

1. Incorrect work throttle valveresponsible for air supply. If the flap after the gas reset or the engine warming cannot closer, and the gap is formed in it, the enriched fuel and air mixture is enriched into the engine.
2. Open Side. SUPPLICATIONS - Handle adjusting the air damper responsible for air flow into the carburetor. With it, you can enrich the fuel and air mixture with air. With an incorrectly working sacrifice, the mixture is re-enricged by air.
3. Binding needle valve. In this case, the incorrect dose of fuel will flow into the fuel combustion chamber. Needle valve malfunction can manifest in different ways, including the lack of inclination.
4. Invalid idle adjustment. With such a problem, car owners who changed or repairing the carburetor are often faced.
5. A rather rare cause is the root of the cylinder head gasket. The problem is manifested not only by increased motor turnover, but also the appearance of white smoke from the engine compartment.

On injection engines

Car equipped with injection engines, the range of reasons for increased revolutions is wider. This is due to the fact that there are much more in such machines electronic devices and sensors responsible for the transfer of information in the electronic unit Control controlling motor turnover. Therefore, violations of the operation mode of the engine can be associated with mechanical damage, and with a malfunction of electronic systems.

The cause of increased rolver injector engines Maybe one of the following problems.

1. Incorrect work or failure of the coolant temperature control sensor. With this malfunction, the engine constantly works in warm-up mode, since the ECU (electronic control unit) does not receive information from the sensor that the motor is already heated. As mentioned above, in such a mode of motor turnover.
2. Breakdown sensor mass flow Fuel (DMRV), which is also referred to as idling sensor. The DMRV malfunction can manifest itself in different ways - disappearing or increasing revolutions. In the latter case, the engine also goes to constant warm-up mode.
3. Throttle position sensor fault. In this case, the sensor malfunction can be perceived by the ECU as information about the open throttle. Then the control unit gives a team to increase the revolutions.

Also, the reasons for the increased turnovers of injection engines can be associated with mechanical damage.

1. The breakdown of the return spring throttle.
2. Singing the throttle cable.
3. Damage to the gaskets of the nozzle.

What to do

To solve the problem, it is necessary to diagnose it. On cars equipped with carburetor engines, successively checked and faults are corrected.

1. The incomplete closure of the throttle is most often due to the formation of rigging products. In this case, it needs to be easy to clean with a carbcliner. If the throttle is not closed completely due to the chip or crack, it will have to be replaced.
2. Sack fault can be eliminated by lubricating the cable and the air damper drive.
3. The problem of the needle valve is solved by replacing the part.
4. Incorrectly configured idling can be corrected, adjusting it correctly.
5. Burned gLP gasket Changes to a new one.

Solving problems with electronic sensors injector engines is almost always solved by their replacement. Their fault is manifested by the appearance of the inscription Check EngineAfter diagnosing the scanner, you can get an error code indicating a specific problem. Also, to diagnose sensors malfunctions, you can use a multimeter in the module mode.

How to avoid the problem

If all parts and knots of the car are in order, then the problem of cars equipped with injector fuel injection can be wounded in the computer firmware. It is the control unit regulates the engine speed and the composition of the air-fuel mixture entering the cylinders. To avoid further the problem of preserving high revolutions after the gas discharge or warming the motor, you can reflash the electronic control unit.

Another reason is that the revolutions are saved when driving, it may be a rug, watering the gas pedal. In this case, the accelerator pedal is not fully determined, which leads to excessive enrichment of the fuel and air mixture. To prevent the problem, you just need to fix the rug.

It is very important that the engine work correctly in any mode, including at idle. However, many car owners face a problem: when the engine is discharged, the engine turnover is not reset. As soon as this defect is detected, it is necessary to immediately find out the reason and eliminate the malfunction for the uninterrupted operation of the car. Also, the engine can reset the turnover for a long time, which also does not contribute to the right job.

Usually upon reaching the operating temperature, turns should fall to its norm. Indicators for each specific model vehicle The manufacturer indicates the instruction manual. They can change slightly depending on the mileage and the overall condition of the car, but usually hold up 650-1000 revolutions.

In some cases, turns are very slowly discharged or at all hold on at the same level in 1500-2000 revolutions. In this mode, not only the fuel consumption increases, which affects the driver's finances, but also contributes to the wear of the engine.

The cause of work failure in idle mode must be diagnosed using qualified masters. However, to independently understand why the engine turns do not fall.

Carburetor System Problems

When the gas is discharged, the drop in revolutions can pass badly both on the injectors and on the carburetor systems.

If the car is a carburetor, then there may be several defects.

Most often, turns are not reset due to the faulty throttle. When the engine warms up, it is in the open position so that more air falls into the system. Then it closes and turns should fall.

Not closed to the end, the throttle valve leads to the fact that when the operating temperature is still being reached, the re-entered mixture is still fed, and the revolutions remain at the same level. If this item is strongly contaminated or deformed, it cannot be completely closed.

Clean the damper can be cleaned with special toolsBuy that can be in the store of automotive goods. The deformation may require the replacement of the carburetor completely. The valve can be loosened loosely, if the drive cable is strongly worn. His replacement can correct the situation.

Another common reason, due to which the engine speed does not fall in idle mode, becomes a laying between the carburetor and the head of the cylinder block, which has become unusable, or the damaged intake manifold.

After replacing the carburetor or cleaning the power system, it is often possible to notice that the engine turns slowly. This is due to improper adjustment of the idle system, the re-entered air-fuel mixture is often fed. To eliminate a malfunction, it is necessary to adjust the supply ratio into the fuel and air system.

Also provoke a defect of the work can high level Fuel in the carburetor float chamber. The needle valve is responsible for it. Checking this detail can correct the situation.

Injector system

If an injection system is installed on the car, the causes of high speed at idle can be significantly larger. Here, both mechanical elements and electronic devices that are responsible for adjusting the XX can fail.

The main malfunctions of the injector include:

1. Wrong work temperature sensorinstalled in the cooling system. Incorrectly obtained data from this instrument makes the electronics to recognize the engine as cold and work for warming up, due to which high revs required for a set of operating temperature are supported. Often, overheating may occur, which leads to more serious breakdowns, up to the overhaul of the engine. The same effect is possible with incorrect operation of the idle mode regulator.
2. The cable regulating the work of the throttle can ignite. Than more mileage The car, the higher the risk to face a similar problem.
3. The electronic XX operation sensor often comes into a malfunction, then turnover will be or grow or will disappear.
4. The spring, leading the throttle to the original closed position, incorrectly functions, scores or is very stretched.
5. To the combustion chamber of fuel, there is too much air due to poor-quality or past gaskets. It is necessary to carefully check the collector seals and nozzles.
6. And the most simple reason is usually the wrong arrangement of the rug after a visit to the car wash or dry cleaning of the cabin. It is often inactively placed under the accelerator pedal, which leads to the visibility of the engine improper operation.

If the car is oversaturated with a variety of electronics and all work is built on the proper functioning of the sensors, one of them may well become a problem. It will serve incorrect data on a computer, as a result, turns will not fall. Self detect the problem, most likely, will not succeed.

It is necessary to contact the car service for computer diagnostics. The best task will be cope with specialists working on a service that specializes in the repair of a specific car brand. If the diagnosis is carried out on time, it is possible to get rid of a simple sensor replacement.

It is not worth tightening with repair, because the oversaturated mixture does not affect the operation of the engine and significantly reduces its life.

Floating revs

In addition to slowly falling revolutions, car enthusiasts can push into such a phenomenon as floating momentum when they fall, and then increase sharply. The reason becomes an excessive supply of air into the system, which causes the engine to spin turns up to 2 thousand at idle.

This often occurs in cars having a fuel injection sensor. It calculates how much air is needed. When his work is broken, then in different time Miscellaneous amount of oxygen is supplied, as a result, surround jumps are observed approximately every 3 seconds.

Faced with a similar phenomenon, there will be a prerequisite computer diagnostics. It is very important that her and all subsequent work carried out experienced, qualified specialists. Turning to a service that does not specialize in breakdowns of this kind can face the need to conduct an expensive overhaul Engine ahead of time.

Eleaches with the owners of the front-wheel drive vases are enough for the entire operation time of the machine. One of the most rapid - high idling speed, and, on the already heated car. This problem usually causes annoyance, since the reasons for its occurrence is too much, and the search for them is not easy.

We list them.

1. The most basic - malfunction or failure of the air consumption sensor.
2. No less often a breakdown of an idling valve.
3. The crankshaft position sensor, which issues incorrect information of the control unit, can also become a root of high or floating idle speed.
4. Another throttle position sensor can be facing.
5. It happens that for any reason it is not returned to the gas pedal back to the end. Moreover, this is happening as due to a banal violation of the operation of the cable, so because of the very funny - for example, after washing the car, the driver's rug was so stuck that the tip of the rug began to touch the pedal.
6. Strongly clogged air filter. Because of this, a mixture for combustion is obtained too enriched with gasoline, again there are high revs during idling.
7. Fleamed cable with throttle valve.
8. Malfunction of the engine temperature sensor. It gives the "brain" of the car the wrong meanings, they increase the speed of the crankshaft, thinking that the engine is cold.

As you can see, we have a whole forest of a variety of reasons why high revs appear! We further consider the most characteristic, plus the most common problems associated with the described problem. At the same time we'll figure it out how to eliminate them with your own hands.

Ways to eliminate "sores"

If such a trouble happened, to look for which node is to blame, you need analytically, checking all the indicated sensors.

For starters, consider the following correction option. problem situation. Suppose there were high revs from the VAZ 2110. Inspection of suspects for faults of nodes showed that the throttle position sensor has traces of rust. It is located directly above the throttle. The voltmeter measurements have shown that during operation of the motor, the voltage on it remains high - it means that it does not close the flap.

How to eliminate a malfunction? To do this, we will need only a screwdriver. We proceed to implement the procedure.

1. Disconnecting the terminal block, as well as unscrewing two screws, dismantle the node.
2. We notice that traces of rust inside interfere with the wheel of a wheel regulating the position of the flap.
3. Fulfing the insides of the defective device penetrating aerosol against rust.
4. Screw a screwdriver for development.
5. Build the assembly in the reverse order.

Checking whether the engine is highly high. The problem must eliminate.

Now we will analyze a different case. Let's say, we have overestimated speed at idle at VAZ 2114. That's what we do, facing this situation.

When finding out the circumstances of the study, the problem is inspected initially always the operation of the idle sensor. This device consists of a needle embedded inside the electromagnetic coil. The needle either moves inside the coil, moving away from the throttle hole, or put forward, closing this hole, thereby stopping the air supply for the combustion of the mixture.

Also read about and.

This element is located at the throttle damper, opposite the gas pedal cable. To diagnose it, we pull out a terminal block from it, we bring the car, after which we see that we still have high engine speeds have not changed at idle. Then remove this defective node, then make it cleaning or replacement. To work, take:

• screwdriver;
• toothbrush;
• petrol.

Begin.

1. We unscrew the two screws. Give a broken node.
2. Connect the wiring to it. Turn on the ignition. If the needle of the device to the touch slightly pulled into the coil, then it is working.
3. If the needle does not react when the electric current is supplied, wash the device with a toothbrush with gasoline.
4. Assembly make in the reverse order.

When it is not possible to restore the performance of this node with your own hands, it is better to purchase a new one. Moreover, the cost of spare parts is small.

Other ways to fix

Of course, the options considered options are not exhausted possible ways to correct the disadvantage when high revs are seen on a warm engine. For further study of the most common situations, we will analyze the case with a malfunction of the air consumption sensor.


This device is responsible for feeding the right air portions to combust the mixture, and also gives data to the block. electronic control About these portions so that the unit commended the serving portions of gasoline.

The diagnosis of this node can be made as follows. It is necessary to turn off the terminal block from our mass flow regulator, and then start the engine, after which you need to pass on the revolutions crankshaft Above 2000 rpm.

It automatically starts emergency mode, portions of the mixture are now calculated only by the position of the damper. If the sensations have shown that the car with a disconnected sensor has become more dynamic than with connected, then the malfunction of this node is obvious.

To replace it, take the following tools:

• screwdriver cross;
• screwdriver flat.

We start repair.

1. Loading the motor, we turn off the wires from the mass flow sensor.
2. Weave the clamp, remove the hose on the inlet tube.
3. We dismantle a defective device, unscrewing two bolts.
4. We produce a replacement of the device.
5. Build the assembly, moving on the points ago.

This is how this reason for high revs are eliminated.

For some reason did not help

Now we will analyze such a situation. The car owner changed, for example, a idling sensor, while the crankshaft was high, or still remained elevated.

The reasons for such an unpleasant phenomenon may be as follows.

1. Most likely, the motorist did a replacement just like that, Naobum, may cease to turn too quickly. Real position Things says that the malfunction must be sought elsewhere.
2. If this is a sensor is not a completely new sample, it has an adjusting bolt, you may need to twist it to configure the problem node. Modern idling valves when installing them do not need any additional configuration. However, for example, if the priors have high speed at idle, then this car You can search the adjusting screw.
3. It is possible that the new spare part was defective.
4. Incorrectly installed a new spare part.

Here, perhaps, all the roots of the phenomenon are listed.

Talk about the cost

Not all under the power of this type of repair, as even reinstalling some sensor. Although the main difficulties cause not so much the substitution of one of the sensors involved in the process, but it is precisely the diagnosis of the origins of the field of rotation of the crankshaft when working in the work. After all, we found out that the search for the causes of this disease is complicated by their diversity.

If the motorist decides to turn to the masters a hundred, with a request to find the cause of the high speed of the engine produced at idle, the cost of diagnosis on major cities of the Russian Federation will be such.

Since the price of manipulation is low, then if the car owner doubts the success of his own diagnosis, he can safely contact the service station.

In the course of the article, we reviewed the basic solutions to a common problem. Now, if the car enthusiast faces the manifestation of the overestimated speed of the crankshaft of the crankshaft, he will already know how to do.

Now read about and.

Often drivers are interested in why engine speeds do not fall at idle. This situation is quite often occurring, and no carburetor engines or more modern injectors are not insured. True, the causes of malfunction will be different. But, in practice, everything can be diagnosed on their own, as well as almost on all models of cars, the problem is eliminated with their own hands without any particular difficulties. Here the most important thing is to correctly diagnose, it will significantly speed up the repair process, and will save you from additional problems and difficulties.

What it is?

Why don't the engine speed fall at idle? For a start, let's decide how to understand that the problem arose, and also let's see what it can lead to. To determine the increase in speed at idle can even inexperienced car enthusiast. It is easily felt by rumor. With increasing revolutions, there is an increase in the noise of the operating engine when the gas pedal is released. Also on the machines equipped with a tachometer, you can trace the increase in the revolutions. Almost on all models of passenger cars, idle turns fluctuate within 650-950 revolutions per minute (Specify the indicator in those. your passport of your car), all that is considered to be a deviation from the norm. Also on many injectors such a problem causes the inclusion of "Check" on the panel.

Carburetrators

To begin with, we will deal with the problem on carburetor engines. This type of food is considered obsolete, but still many cars on the roads are accurately so. Also, many motorists in their ideological reasons use such motors, and are not going to refuse them. Diagnose the source of the problem here is quite difficult, and this is taking into account the small list of elements that cause an increase in revolutions. Let's look at what should be paid to:

• Loading needle valve. In this case, the fuel enters the chamber is not dosed. Moreover, depending on the location in which the valve jammed, idle turns can both disappear and vice versa increase;
• Violation of adjustment idling systems. It usually occurs after cleaning or repairing the carburetor. To avoid problems, you should correctly set the ratio of fuel and air. If you have not previously done, it is better to read how it is done on your version;
• The problem is closed. There may be several reasons for such a malfunction. Most often, the damper is not closed due to the presence of Nagar on it. In this case, you will need to clean this node. Usually, it helps. In some cases, the throttle may be damaged. Then it will be necessary to change this item, but this possibility is not provided on all carburetors;
• Sometimes, the problem may manifest itself when it happens quite rarely. But, nevertheless, it is better to check. For this, on the engine running engine, open the radiator cover, with a running gasket from the neck, the white smoke will go out. In this case, it will be necessary to change the gasket;
• Open Soots. Check how the valve works in the primary chamber. If they revealed the problem, then it makes sense to see how the sacrifice works. Most often, to eliminate the problem, it is enough to simply lubricate the cable and the damper drive.

Injector

On engines that are equipped with injectors, possible causes For high revolutions more. In particular, the problem may be caused by both mechanical faults and the refusal of electronic sensors. But, in contrast to simpler carburetors, it is simplified by the presence on-board computerwhich is capable of reading errors. So, consider the reasons for increasing revolutions on the injectors:

• Failure When breakdown of this sensor, force aggregate It starts to optistically work in warm-up mode, that is, the revs are not reset. The control unit believes that the optimal working temperatureAnd trying to heat the unit. Such a malfunction is fraught with overheating of the engine and expensive repairs. The easiest way to identify this problem using computer diagnostics;
• Violation of work. Sometimes, the reason in the mass flow sensor. Again, they are diagnosed, after which suspicious sensors are checking the multimeter. Additional check is required to eliminate the wiring break. If necessary, faulty sensors change;
• A throttle cable may occur. Check it with its performance. When the malfunction is detected, it is recommended to try to lubricate the cable, and develop it. If it does not help, you have to replace the part completely;
• Jumped, or the return spring of the flap was too stretched. This problem is also characteristic of old cars. Put the spring in place. If she stretched, it will be needed to buy an injection repair kit;
• . In this case, it serves an engine control signal of an open valve, in turn "brains" of the car provide more revolutions than in fact. The reason for the breakdown may be in a simple piece of part, or resistance brave. In the latter case, only a variant with a sensor replacement is possible;
• The last reason to be checked is the integrity sealing gaskets injectors. The check will require enough serious interference in the injector, therefore, they check this cause last, although this phenomenon is not the rare. In case of damage to the gaskets in the combustion chamber, there is an excess air, which causes an increase in engine speed.

Conclusion. Problems with the operation of the power system at least once met each motorist. Therefore, such a question is why the engine speed does not fall at idle, is not amazing. Unfortunately, it is almost impossible to answer it uniquely. There are quite a few reasons for such behavior of the car. To reveal and eliminate breakdown, you will have to carry out a detailed diagnosis.