Why engine speed is raised, then fall. The reasons for the rotation of the engine speed at idle why the speed is falling at

10.10.2019

Need all systems power aggregate worked regularly. 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.

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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. This is necessary in order for the power unit to work steadily 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 the carburetor machines Engine speeds do not fall often and if the gasket between the carburetor has 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 B. float chamber 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 injector cars . As for troubleshooting, the injection system itself is more difficult, that is, the reasons high revolutions 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.

Similar words, if the specified sensor supplies an incorrect signal, the ECU believes that the engine is cold and uses 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. Still spring that closes throttle valvemay stretch or turn out to be 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 Such a phenomenon becomes the supply of unnecessary air, which leads to the "jumps" of revolutions 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.

How to find the cause of the problem

If the VAZ 2114 turns are falling, it is necessary to comprehensively digitize the functioning of the injection system on its car, which can be done in itself in the garage in the presence of small experience and relevant instructions. An important advantage in this case is those "fourteenth", which from the factory came across dashboard From the German VDO manufacturer, as it is, compared with the analogue from the score, is equipped with a self-diagnosis regime.

To carry out this procedure, you will need to perform several non-speed actions:

loading the motor, you need three or five seconds to keep the odometer button down;
transfering the ignition of the engine to the first position, the button must be released;
the arrow should appear on the display, which is a signal about normal operation, then the button must be pressing the first (display of the firmware version) and the second time - after that there will be probable errors in the ECU;
to reset the error message, you will need to hold the button before the zero appears on the display.

Having read the manual, you can find out which errors shown on the screen can be related to the fact that turns are constantly falling when the gas is discharged to the VAZ 2114.

So, it may be one of the following situations:

code 1 - controller error;
code 14/15 - Cooling fluid sensor error;
code 22/23 - throttle position sensor error;
code 33/34 - error of the air flow sensor;
code 42 - faulty ignition;
code 44 - depleted or too rich fuel mixture.

The owner of the VAZ 2114 should be remembered on the specific features of the work of self-diagnosis on its auto: if there are several errors, the computer summarizes their codes arithmetic, which can be misleading. Specify this can a logical inconsistency of the displayed code of actually available problems.

For complete confidence, it will take either to take the car to the service and pay for its inspection, or to buy a diagnostic scanner itself, which is not so expensive. Another option - in the presence of the same model of the VAZ (fully serviceable), take turns from it and put on your car potentially vulnerable sensors, the exclusion method I find out the problem.

Search for breakdown without using on-board controller

The external "symptoms" of the behavior of the car and, in particular, its engine can also give a lot of food to think about the experienced and observation driver. Analyzing these factors, you can significantly reduce the list of probable causes of malfunction.

For example, you need to track the moment of arbitrary engine drill - at idle, with a cold start, after heating the engine to a specific temperature or when harsh pressed on the gas pedal.

In addition, you should pay attention, whether turnover is falling at a constant podgezka, and how does the engine behave when braking, release the gas pedal and turn off the transmission?

In terms of visual-audible diagnostics, it will be worthwhile to check the circle potentially vulnerable nodes that can lead to the fact that the VAZ 2114 stalls when the gas is discharged.

First, it should be started from checking fuel and air filters - it is recommended to change them every 30 thousand kilometers, but in fact, the operating conditions and the quality of filters leads to the fact that it is better to reduce this period for avoiding problems (especially since machines with cars big mileage Filters clog even faster).

In addition, it is necessary to check the fuel level in the tank, no matter how ridiculous it sounds: the fuel level sensor often deceives the driver, and in addition, the car can tritely stand on a slope, because of which the fuel pump simply does not supply fuel to the engine - hence and The reason for the turning distance.

Very common situation - the appearance of problems with ignition or retention of revolutions after small independent repair: In this case, you need to check all the chips, contacts, terminals and wiring to exclude the usual human factor again.

Rolls on neutral transmission

If the VAZ 2114 is falling and stalls the engine "on the cold", probable causes of problems are not so much: the failure of the fuel pump, breaking the idle regulator, which is lit injector or failure in the cooling fluid temperature sensor.

The main ways to solve situations are the following:

1. If the reason in the idle regulator, the engine will constantly trim in this mode, and not just stupid. For the diagnosis of PXX, the multimeter, which, with a muffled engine, measure the resistance: on terminals A - B, C - D, it should be equal to approximately 54 ohms, whereas there will be equal to infinity between pairs. Any deviation from these indicators should be considered a malfunction.

1. The dirty injector is a very common situation, if you consider how poor-quality gasoline traded on most of the refills: Sometimes the use of a special tool for cleaning the injector can help. Worse, when the nozzles clogged - if the cleaning agents did not help, you will have to change them or carry it into the service for cleaning.
2. The failure of the gas station is usually preceded by characteristic signs of violations in its operation: the attentive driver long before the breakdown will hear the difference in the sound of the pump when the engine is started. If there is no problem with a slocessing engine when driving on transmission, but idle occurs, you can pre-check the fine filter.

Sometimes candles can be out of order, which direct affects the work of the entire ignition system, but regularly replacing them in preventive purposes pre-warns the emergence of the problem. Additionally, it is recommended to check the state of the ignition coil.

Malfunction in the operation of the sensors

Normal functioning injector Engine The VAZ 2114 provides the correct operation of four key sensors: the position of the throttle, mass flow of air, the position of the crankshaft and the coolant temperature.

Throttle Position Sensor VAZ 2114

Excellent if the car is working, and the only concern that wins the car enthusiast is to open the hood and add water to the washer tank, but check the oil level. But such an idyll may end up at least at least, and you notice that the motor turnover has become uneven, and this means only one thing - it's time to turn to the special car service. But some owners of cars are trying without the help of others to cope with inconsistency. Let us try to figure it out that you can directly be done by facing a similar situation, and why the motor turns are risen, then fall.

Engines with fuel injection.

When such a flaw occurs at a motor having a fuel injection, maybe it is associated with excess air sucks. The car's computer regulates the air intake in cylinders, this is that the injectors valves are opening at a certain time.

It turns out that when there is a lot of air, the sensors responsible for the position of the throttle are fed by the computer. This signal can do during the warming of the machine and this is normal, but when it happens the same at another time, the computer does not consume what to do with this signal, and tries to adjust the system and adjust. But such samples are being deposited, and there is a constant change in the rotor of the engine at idle, usually, within 800 rpm to 1200 rpm with a periodicity of about 3 seconds.

In order to bring the car to normal, you should make the subsequent. First you need to spin the screw that regulates the rotation XX, trying to reduce excess air flowing through the standard hole. This may eventually help adjust the air intake, and the engine will start working on the XX as it should be.

By doing so, you can not always achieve the desired result, and you can experience another option. Taking advantage of the passports, try alternately to pass the rubber tubes. In this case, when you found that, with the next pressing of the tube, the engine began to work normally, means a malfunction is found, and you need to further understand what the matter is.

First you need to remove the tube, overlap the hole and try to find the cause of the fault. We check the entire tube and find out to which device it leads. In most cases, the tube will lead to a starting device, and maybe one of the valves either into a device that supports turns. The purpose of the listed devices listed above is the passage of air, not using the throttle valve. The computer, fixing their work, is increasing the supply of fuel consistency. It does that after warming up the motor, when it does it in normal mode, the additional air entering through the open valve of the device prevents the usual operation. It is required to note that the engines of individual stamps, for example, the 1G tota office, have a warm device and a throttle block as one unit, i.e. There are no tubes between them.

After you have done all the tubes and have not found any improvements in the operation of the motor, you can safely remove the air duct in front of the throttle block. Through the hole of the tube located in front of the throttle, there is air intake on this damper. You need to start the engine and plug the hole with your finger. With all this, observe the motor turnover. If they are normalized, then spray at least waters created for cleansing (which is like a spray to clean the carburetor), and here muffle the engine. After this act, add a small amount of cleaning water, and let all this last about 15 minutes, and later launch the engine again. It may be completely possible that these acts are crowned with a furror, and the valve of the warm-up device will start normally. Well, if these acts were not effective, then the hole should be shuffled by a cork like. In this case, the operation of the motor is normalized, but with all this there will be a warm revolutions. During the start "on the cool" work will have to make the driver using the accelerator pedal, until the throttle block is replaced. You can experience repair a faulty rod.

It should be taken with attention to the fact that the engines with injection in non-disconnecting order have a device measuring the amount of suction air. This is so referred to as the flow meters on the inlet pipeline located for air filter (Options are the thermistor to Nissan, mechanical in Tomata, etc.). And maybe after the vacuum sensor, reaching after the throttle. It is not difficult to find these details, there are wires to them, maybe three, and maybe more. If you remove the piping that is responsible for entering the aircraft with a throttle, most likely that the device will turn off and completely may be that the engine will not start. Therefore, take into account this feature.

Another point. Injection engines have a device forced to increase idle speed capable of passing air, which, in turn, causes malfunctions in the motor. It is quite often placed on top and unnoticed can not be. This device looks like a motor with wires going to it. After changing the tube, led to it, you can also do the operation of the motor.

This device is at a time when the engine starts, the valve opens, providing air flow, and how it starts, the device closes the valve. Its main purpose is a forced increase in the revolutions of XX. The device is triggered not only during the start of the motor, but also with additional loads. In this case, the uneven operation of the motor (the motor turnover is risen, then fall) - the consequence of the fact that the valve does not hold. There are two outputs - the substitution of the entire device, or install the newest gasket with cleaning the device. The problem is that often these devices are unrealistic to disassemble.

The main reason for uneven revolutions, often encountered these engines, is what the crankcase ventilation valve is hired (differently - Sapun). The most popular repairs method - removing the ventilation tube, shut it. On the nozzle, which is located on the valve cover, you should wear a rubber tube and nothing to be fixed, let it simply hang. An example of Moskvich, Zhiguli, which can be relaxed with such a system, but, naturally, can be an example example. best solution - Substitution of Sapuna.

Let's still see the background, why the carburetor motor turns are risen, then fall.

The prerequisite of uneven operation of the carburetor motor can be an erroneously adjusted servomotor, the purpose of which open the throttle is dependent on necessity.

Here you first need to unscrew the servomotor's adjusting screws, its drive is twitched immediately with the revolutions configuration. This measure can fully become effective, and the engine will start working fine. It often happens that auto-owners who have experience in regulation and repair "Zhiguli" try without the help of others to adjust the XX in an imported machine. They are not needed, and they begin to act according to the "Tyka" method, turning everything to go under the arm, suddenly will help. And the adjustment screw in the carburetor is a stubborn throttle screw. Having experimented with adjustment, similar "specials", without receiving results, leave a car in a unbalanced state, because they do not know which initial state was at adjusting systems. And after these actions, there are complaints about "failures", when the gas pedal is pressed, or on uneven operation of the motor, and they can complain about the entire flow rate of a fuel or not an easy motor start.

It happens that air flow occurs through the gaskets located between the collector and the carburetor, on which cracks are formed. To determine the lack, you need to spray the cleaner around the perimeter of the gasket. If the operation of the motor has become better, means failure in gaskets.

Take a brief operation of diesel engines.

Uneven operation of diesel engine can occur at 1000 rpm, and at 1500 rpm, and not just idling. In the main, the motor turnover is risen, then fall, because the movable winding blades are hired, which may be a consequence of rust from water that is in a stuel. Usually, it is typically for cars, has long been not exploited. Therefore, here is the advice - before throwing a car for a long stay in the garage, you need to add a liter to fuel consistency motor oilAnd in the last day ride such a consistency. The engine will begin to smoke, but the parts in the TNVD will be covered with oil film. True, environmental services will not be treated.

In this case, when the engine works, and the turnoves are falling, then risen, you need to swing up the fuel mixture with the help of a manual pump (buttons). The situation will improve, as it will occur for the violent creation of fuel in TNVD ( fuel pump highest pressure). In this situation, you need to remove the TNLD, disassemble it and clean it. But when you create disassembly, arm yourself with paper and handle, and painstakingly fix the sequence of work, so that in the coming it was easy to collect it.

Try to work without the help of others, but in the absence of positive results, despair at 100, where your car is guaranteed to put in order, and at the same time you will "praise".

The rotor drop is a sufficiently unpleasant incident for your car. It is not only about the inconvenience and the emergence of questions about the serviceability of the car, but also about the work important mechanisms. The problem is that a sharp drop of speed at idle when the car rolls on neutral transmission, can drown out the engine, and this becomes dangerous for further movement. The driver may not notice such an incident, turn on the second gear and release the grip, which will cause a sharp braking by the engine. Auto can get "from the pusher" in this way, and it can just stop than creating an emergency. When driving a car, the drop of revolutions is also unpleasant to the driver's confidence. You have to constantly podge the foot or use other methods of engine retention in working condition. It is worth understanding the causes of the problem.

So, why do turns fall when warming on cars with a carburetor? You can find a lot of general reasons that combine owners as a specific auto model and a particular type of carburetors. It must be said that today the car with such a type of fuel injection is no longer released. This is not the most successful solution, since the carburetor is very sensitive to the quality and purity of fuel, it often requires maintenance and does not serve very well in different climatic conditions. For this type of gasoline injection, stability is necessary, but in our operating conditions provide such a luxury is simply impossible. Therefore, there are various problems that can lead to significant discomfort and even the danger of movement by car. Today we will look at the main reasons for a sharp or waveway drop of revolutions when warming on cars with carburetor fuel injection.

Perhaps the case is not in the technique, but in refueling?

As mentioned above, the carburetor is very sensitive to the quality of gasoline, which you pour into the tank of the car. If sacrifice or impurities come out, the technique will not work normally. Dirty gasoline to a certain pore is cleaned with a filter, but over time, such a cleaning ceases to help. Fuel with impurities and inclusions may be a big problem that affects not only the revolutions. Here are several important indicators Such a problem:

already a few kilometers after refueling by poor-quality gasoline, you will feel changes in the dynamics of the car, the fuel consumption will increase and stability will deteriorate;
engine turnover at idle can swim, and it will talk about the unstable fuel mixes, at speeds are also small jerks and failures in the aggregate traction;
after cooling the engine at the next start, the warming can start unexpectedly with low speedYou will have to play sawmill in unusual ranges;
it is also possible that after warming up to 30-40 degrees, a failure will arise, which will need to be compensated for by pulling out the supply until it stops or podging the foot;
when warming up operating temperature The motor will work relatively stable, but the speed of revolutions will remain, it is these indicators of poor-quality fuel in a car tank.

These criteria suggest that it is better not to go to the usual refueling for you. Of course, the same problems are possible if the carburetor fails and needs maintenance. But often these problems arise precisely with poor-quality fuel with a low octane number or with impurities. Therefore, the first thing is to roll out the gasoline on a heated motor and add good tested fuel to it.

It is time to serve the carburetor - small defects

The reason for the fall of revolutions during warming can also be a small breakdown in the carburetor system. These are broken membranes, mixed fastening of cables or the showering of the damper. Such troubles can be cured during the audit of this device. In the old days, every second driver of the car could independently sort out the carburetor, install Remkomplekt and go further, listening to the satisfied rumbling of the aggregate. Today the principle of repair is as follows:

you should go to the automotive store or market to find a suitable repair kit for your type of carburetor, it is better to take original high-quality details;
it is further important to find a wizard who is well versed in carburetors and can help eliminate problems in your device, such masters in cities are less and less;
a specialist for several tens of minutes will move the equipment, will find a problem and establish new gaskets, membranes, seals and other products from the repair kit;
next, it is necessary to check the equipment to make sure that there is no unpleasant effects, it can often be done only the next day on the cooled car;
the last step is regular visits to the master 1 time in 2 years for maintenance and revision of the carburetor, this will allow you to save the car in a normal working condition.

There are advantages in the fuel injection carburetor injection. For maintenance and cleaning the injector will have to pay a whole condition. But the repair of the carburetor even with the replacement of certain parts will not cost too expensive. But to get these advantages, find a master who is well familiar with the features of your car model. Such a specialist will help to correct all problems and continue to exploit the car without problems.

Condensate or dew point - is it possible?

On VAZ 2107 cars, the engine revolutions is very often occurring while warming up until the aggregate stops. Such trouble is characteristic of all carburetors, except for Saleks. The problem is that at temperatures from 0 to +5 degrees in the chambers of the carburetor, condensate can be collected. This is a specific type of dew, which is formed during temperature drops. After starting the motor to the cold, the following process occurs:

first, the open sublicas launches the enriched mixture, which without problems burns and does not cause tangible changes in the operation of the power unit, which is very important for normal launch;
as the owner of the car lowers the sublicas, the mixture is approaching the characteristics to the worker, and the entire engine system is already a little fundamental, and the most interesting thing begins here;
condensate or dew start to enter this mixture and change its properties, in some models of devices it happens quite quickly and unpleasantly, causing a stop of the motor;
the driver again pulls out the seats or presses the gas pedal, the mixture is enriched, the motor is working normally, but up to 60-70 degrees this process may be repeated infinitely;
after warming up to about the operating temperature, everything is normalized, the revolutions come back to normal, the engine works well, so when a visit to the station, the wizard will not detect anything.

How to deal with such a situation, it is difficult to even imagine. The only efficient way will be the replacement of the carburetor to the Solex, but also in these models there are often problems with the launch of the power unit in transition temperatures. So give any specific advice in this case is not easy. Best maintain equipment on time and always maintain fuel equipment in good conditionThis will help to get due reliability of the machine.

Are there any other reasons for a sharp drop of revolutions?

The causes of such trouble can be a whole set. If you repair the car yourself, it is worth a slightly look at trouble and try to find reasons in other nodes. But it is worth moving onto other features of the car only if you were convinced of the high quality of the carburetor, normal fuel and other features mentioned above. Here are some more ideas for checking:

fuel filters - very often filter elements are clogged, and the owners forget to change them in time, and this leads to serious problems with the vehicle;
the thermostat is possible after a minor habit of a small circle, your thermostat opens and keeps sharply ice fluid into the engine, which leads to a drop of revolutions;
electronics - It is worth checking the ignition, a normal timing belt setting, no problems with sensors and various electronic equipment on board your car;
the inclusion of electricity consumers - perhaps, in your car automatically turns onto a powerful device, which gives the load on the unit, the revolutions are inevitably falling;
the valve system - sharp drops and drops in this case will not be, but floating and unstable turnover are quite possible, and with the load they will turn into a fall.

The reasons for the instability of the engine operation can be a lot. Sometimes the problem is that the generator at a certain point ceases to give normal voltage, which affects work electrical systems Engine. The load on the motor can also be due to poor oil or internal breakdowns in the cylinder block or in the valve system. So you can dig in this case for quite a long time, and it is better to visit a hundred and find the cause of the problem.

We offer to watch a video with a solution to one of possible causes This problem:

Let's sum up

There are dozens of breakdowns that lead to a sharp or smooth drop of revolutions on carburetor cars. But the question is that the equipment turns out to be quite demanding for service, therefore, it is necessary to eliminate all the reasons to be taken together. If you always encounter such a problem, it means that this is the specifics of the carburetor, installed in your car. Most likely, only replacing the device will help get rid of trouble. If the trouble occurred only a few times, it is worth trying to serve fuel system, Replace the filter and install a new carburetor repair kit.

Auto with such a type of injection gradually inferior injector systems. They are more reliable, more economical, serve longer and do not bring such trouble as carburetors. Of course, B. direct injection Also many subtleties and features that should be remembered. But changing the carburetor on the injector is too labor-intensive and expensive. It is better to maintain your technique and achieve its normal work. Even with very good services, after 1-2 years, you will have to go to the service again. Have you ever encountered a sharp drop of engine speed when warming up?

If the load is missing, the throttle in the vehicle motor is completely closed. But the engine continues its work and constantly supports the revolutions, which provides the ability to not start it again at each stop. This is due to the idling regulator, since it allows enough air to the intake path. The breakdown of such a small element is able to significantly complicate the use of the vehicle, according to this, every car enthusiast should know the principles of the idle regulator, where it is located and how to identify the causes of its failure. Information on the methods of restoring the idle regulator will be quite interesting and useful for each driver, which is independently repaired by its vehicle.

Vehicle owners of AvtoVAZ vehicles need to be able to check the idling regulator, because its failure does not entail the triggering of the indicator " Check Engine»On dashboard.

It is for this reason that the owners of domestic cars are often starting to check the car from other nodes, in particular, inlet systemAnd only then go to the idling sensor, although in fact, it is from it that should begin to begin. For owners of foreign cars or modern vase models, such a problem is not relevant, since the failure of the idle controller is easily diagnosed using a special scanner and is displayed on the instrument panel.

Why idle speed swim

The idle regulator is often referred to as the XX sensor. It is so small, which is placed on the palm of an adult. The idling sensor consists of three main parts - a conical needle that is intended to change the bandwidth of the nozzle, the spring and the stepping electromotor with the rod.

Such a device is able to change the cross section of the passage channel, which is responsible for the arrival of the air to the motor during the closed throttle valve. When the ignition is turned on, the idling regulator pulls the rod automatically until the needle falls into the calibration hole. During the start of the engine, the idling sensor automatically opens the passage, which allows the engine to obtain a sufficient amount of air for stable work. In the case of a too low temperature of the coolant, the XX regulator is able to supply more air, providing an increase in engine revolutions to speed up heating. In this way, vehicle It can immediately start, not having warmed the engine, without risk to stall.

The idling regulator is always located near the throttle position sensor. It is possible to recognize it in a typical plastic cover of an electric motor, which strongly performs above the surface of the aggregate. It lasts a wire that connects to the connector nearby or branches from a joint harness associated with the control unit. Here it is necessary to be more close, as on modern carsThe idling regulator often can be located under a common casing that protects the throttle assembly.

No matter how strange it sounded, but the engine is most difficult to work on small speeds. This happens for several reasons:

1. Cold and the motor must warm up to function normally.

2. Between the intake and exhaust manifiers, there is a pressure difference, which leads to throwing the combustion products back to the cylinders. This reduces the efficiency of the motor, which provokes the rapid wear of the parts and increases the percentage in carbon dioxide exhaust.

All this is due to the slow supply of the air-fuel mixture to the exhaust system at this stage. Subsequently, it is mixed worse, which reduces its effectiveness.

Motor speed at idle can swim for many reasons, but you can select the most common of them:

1. If the guide needles erased.

2. If the wire explodes inside the sensor.

How to find out the cause of breakage

There are two methods that will help diagnose the cause of the fault:

1. Demonstant the sensor and connect the four-pin connector again. Leading finger at the end of the needle of the idle regulator. You will need an assistant who will turn on the ignition. If the XX sensor has advanced to the needle, it means it is working and the reason you need to search in the position of the throttle position, since the symptoms of the breakage are very similar.

2. We dismantle the regulator and using the multimeter measure the resistance value in the sensor windings. Between the contacts A - B and the coefficient should be located in the range of 40-80 Ohm. If everything is fine, it is necessary to further produce cross-measurements - between B - C and A - D. The device should show the sign of infinity - the chain break.

No idling sensor does not work how to eliminate breakdown

Very often the cause of the failure of the idle regulator is its strong pollution. To eliminate breakdown, you need to clean it:

1. Connect the wires and unscrew the screws. If the idling sensor is fixed with varnish, you will have to dismiss the entire throttle node.

2. Wash your cotton wand in a special tool or alcohol and carefully wipe the contacts.

3. In the case of strong contaminants of the conical needle, springs or rod, the WD-40 means should be applied to remove deposits.

4. We check the condition of the throttle and clean it if necessary.

5. Mount the idle regulator back and check its performance.

In addition, the causes of the sensor breakdown can be a torn wire. In this situation, it is necessary to clean the platforms of contacts, they solder and cover with varnish this place that corrosion would have had an impact on the reliability of the node. However, not all malfunctions of the XX sensor can be solved simple cleaning. For example, the rod production, the belief of the conical needle or the destruction of the engine is solved only by the complete replacement of the sensor.

Cleaning throttle valve

1. Demonstrate the device. For this, we free the hull of the throttle from the air corrugation. Separate the coolant hoses and check that all fluid flows.

2. Remove the throttle gasket and the damper itself.

3. Clean the base intake manifold in the presence of contaminants.

4. After cleaning, it is desirable to purchase a new gasket.

5. To clean the throttle, there will be enough aerosols and an ordinary cloth.

6. Aerosol must be applied to the surface and leave for 15 minutes.