High engine idle speed, apart from completely unnecessary excessive fuel consumption, also interfere with driving - for example, when driving through a particularly broken section of the road, when you want to carefully "sneak" among potholes in first gear, and the car boldly takes hits on the suspension. In addition, during long periods of inactivity in traffic jams, the motor will operate at an increased temperature all the time.
Let us consider several reasons why the increased idle speed does not fall on a warm engine. The reasons can be malfunctions in both the mechanical and electronic components of the engine power supply system, therefore, we will describe the possible options for breakdowns separately. But since in a car these components interact in a complex, then perhaps you can independently find the answer to the question of why your engine has high idle speed, taking the material of this article as "information for thought."
Checking the intake manifold for leaks
Excessive air leaks can cause high idle speeds. Moreover, depending on the place of penetration of excess air into the intake manifold, the idle speed will either be simply increased, or will start to "float" -.
If idle turns "float", then most likely it is.
If there is simply a leakage of the intake manifold gaskets, damage to the vacuum hoses or O-rings, then the revolutions will "float". This is due to the fact that the amount of gasoline supplied to the cylinders will be constant, and the quality of the mixture will become "richer", then "poorer". When a certain critical value (air content in the fuel mixture) is reached, the engine will start to slow down - up to a stop. But with a decrease in the number of revolutions, the amount of air entering the manifold will decrease, that is, the mixture will be enriched and the engine will "come to life" - the idle speed will increase. This will continue until the tightness of the intake manifold is eliminated.
On turbocharged engines, air can also be sucked in through damage to the intercooler or the connections of the air pipes. In case of significant suction (for example, if the pipe has jumped off the intercooler), the engine starts to work with a hissing (or hissing) sound. But sometimes it is possible to identify the place of violation of the intake tract only by shutting off the air supply to the intake manifold in different places in turn - from the air filter to the manifold itself.
Excess fuel supply
Cleaning the throttle valve
A completely different situation will turn out if not just excess air comes in, but a fuel-air mixture - for example, through a gap formed as a result of a loose closing of the throttle valve. In this case, high idle engine speeds will be stable.
In the fuel systems of some engines, semi-automatic regulation of the fuel supply is provided in the engine warm-up mode - due to it, high idle speeds are maintained until the engine warms up to the set temperature. Fuel is supplied through a channel bypassing the throttle valve.
Such a channel can be closed / opened in various ways - the valve in it has either an electric drive (solenoid), or it can be arranged like a refrigerator thermostat - when the engine warms up, the channel is locked.
At high idle, check the entire throttle body assembly with sensors and XX regulator.
In any case, such a valve can break, and then excess fuel will always flow into the intake manifold, which will cause high idle speeds after the engine has warmed up.
In all such cases, first of all, you need to remove the throttle body and rinse it with a special solution - a lot of such "chemistry" is sold in stores. After flushing, you need to carefully inspect the assembly - especially for jamming or, on the contrary, excessive looseness of the throttle valve.
In addition, the throttle valves of some injection engines have a screw for adjusting the engine idle speed or limiting the closing of the throttle - you should pay attention to them, - whether the unit can be adjusted.
Often, the engine speed does not drop at idle speed due to jamming of the throttle cable or foreign objects falling under the pedal - the corner of the mat, for example.
Of course, almost all of the above can also apply to carburetor engines. In addition, a typical malfunction (or, more precisely, a deviation from the norm) for them is incomplete opening of the air damper - mainly due to improper installation of the "suction" cable. In the absence of breakdowns, the normal idle speed of the carburetor engine is set by adjusting with two screws - the "quantity" and "quality" of the mixture.
Electronics failures
Checking the engine idle speed control
After replacing the idle speed regulator, it must be "registered" ie. enter its parameters into the ECU memory.
The idle speed regulator (IAC) is a stepping motor (solenoid) powered by pulse signals supplied. It works in a similar way to the screw for adjusting the amount of mixture in the carburetor - when the valve is extended, it closes the fuel channel, and opens it during the reverse stroke.
It often happens that the regulator core simply jams and it stops responding to ECU signals. Moreover, you can damage the idle speed regulator even in the store when buying - by trying to turn or press the valve needle with your hands.
If, after replacing the idle speed sensor (regulator), there are high revolutions, then, most likely, the matter is either in the ECU or in the mass air flow sensor - all the elements that make up the power system work in concert, and diagnostics need to be carried out. It is quite possible that you will have to "register" a new regulator - that is, enter its parameters into the ECU memory.
temperature sensor
This sensor can also affect the fuel system of the engine. By giving an incorrect signal (corresponding to a low temperature) to the ECU, it will cause the controller to give a signal to other elements of the fuel system (injectors including) about the enrichment of the mixture. An incorrect sensor signal will lead to the idle speed being more than 1000 min-1.
Mass air flow sensor
Mass air flow sensor directly affects the quality and quantity of the mixture supplied to the cylinders - after all, the ECU "knows" about its composition thanks to this (and some other) sensors.
In conclusion, if the idle speed of the engine of your car unreasonably increased, first look for the cause in possible jamming of the fuel system mechanisms - after all, they are primarily exposed to various contaminants, and voltage surges or short circuits are much more dangerous for electronic components.
It is very important that the engine runs correctly in any mode, including idling. However, many car owners are faced with a problem: when the gas is released, the engine speed is not reset. As soon as such a defect is found, it is necessary to immediately find out the cause and eliminate the malfunction for the smooth operation of the car. Also, the engine can slow down for a long time, which also does not contribute to proper operation.
Usually, upon reaching the operating temperature, the revolutions should fall to their norm. The manufacturer indicates the indicators for each specific vehicle model in the operating manual. They may vary slightly depending on the mileage and the general condition of the car, but they usually stay in the range of 650-1000 rpm.
In some cases, the revolutions are dropped very slowly or they are completely kept at the same level of 1500-2000 revolutions. In this mode, not only fuel consumption increases, which affects the driver's finances, but also contributes to engine wear.
The cause of the idle failure must be diagnosed by qualified technicians. However, you can also independently understand why the engine speed does not fall.
Carburettor system malfunctions
When the gas is dumped, the drop in rpm can go badly both on injectors and on carburetor systems.
If the car has a carburetor, then there may be several defects.
More often than not, the RPM will not drop due to a faulty throttle valve. When the engine warms up, it is in the open position to allow more air to enter the system. Then it closes and the speed should drop.
The throttle valve that is not fully closed leads to the fact that when the operating temperature is reached, the over-enriched mixture is still supplied, and the speed remains at the same level. If this part is heavily soiled or deformed, then it cannot close completely.
You can clean the damper with a cleaning product available from an automotive store. Deformation may require replacing the carburetor completely. The damper may not close tightly if the drive cable is worn out. Replacing it can improve the situation.
Another common cause of engine idle speed not dropping is a worn out gasket between the carburetor and cylinder head, or a damaged intake manifold.
After replacing the carburetor or cleaning the power system, you will often notice that the engine speed is slowly dropping. This is due to improper adjustment of the idle system, often a re-enriched air-fuel mixture is supplied. To eliminate the malfunction, it is necessary to adjust the ratio of the fuel and air supply to the system.
Also, a high level of fuel in the carburetor's float chamber can provoke a defect in operation. 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, then there can be much more reasons for high idle speed. Here, both mechanical elements and electronic devices responsible for adjusting the XX can fail.
The main malfunctions of the injector include:
- Incorrect operation of the temperature sensor installed in the cooling system. Incorrectly received data from this device forces the electronics to recognize the engine as cold and work on warm-up, due to which the high speed required to reach the operating temperature is maintained. Overheating can often occur, which leads to more serious damage, up to a major overhaul of the engine. The same effect is possible if the idle speed regulator does not work properly.
- The throttle cable may become stuck. The more mileage the car has, the higher the risk of facing a similar problem.
- The electronic sensor of the XX operation often fails, then the revolutions will either increase or even disappear altogether.
- The spring that brings the throttle to its original closed position is malfunctioning, popping off, or overstretching.
- Too much air enters the fuel combustion chamber due to poor-quality or leaky gaskets. It is necessary to carefully check the seals of the manifold and injectors.
- And the simplest reason is usually the incorrect location of the rug after a visit to a car wash or dry cleaning of the salon. It is often inaccurately placed under the accelerator pedal, resulting in the appearance of engine malfunction.
If the car is oversaturated with a variety of electronics and all the work is based on the correct functioning of the sensors, one of them may well become a problem. It will supply incorrect data to the computer, as a result, the turnover will not fall. Most likely, you will not be able to detect the problem on your own.
It is necessary to contact a car service for computer diagnostics. The best way to cope with the task is specialists working at a service that specializes in the repair of a specific car brand. If the diagnostics are carried out on time, then it is quite possible to get off with a simple sensor replacement.
It is not worth delaying the repair, because the oversaturated mixture has a bad effect on the operation of the engine and significantly reduces its service life.
Floating revolutions
Aside from slowly dropping rpm, car enthusiasts can hustle with phenomena such as floating rpm as they drop and then rise sharply. The reason is the excessive supply of air to the system, which forces the engine to spin up to 2 thousand rpm at idle.
This often happens in vehicles with a fuel injection sensor. It calculates how much air the mixture needs. When its work is disrupted, then at different times a different amount of oxygen is supplied, as a result jumps in speed are observed approximately every 3 seconds.
Faced with a similar phenomenon, the same computer diagnostics will be a prerequisite. It is very important that it and all subsequent work is carried out by experienced, qualified specialists. Turning to a service that does not specialize in breakdowns of this kind, you may be faced with the need to carry out expensive engine overhauls ahead of time.
Many owners of injection vehicles could observe the effects when the idle speed (XX) suddenly drops in speed. This phenomenon occurs especially often when the motor is warmed up to operating temperatures. Sometimes the rpm drops so low that the engine stalls. Let's see what can provoke low idle speed on a warm engine, and also find out why they fall. This information will be useful to everyone.
The origins of unstable engine operation at XX
How will the picture be if the control unit does not receive data on the amount and volume of consumed air? So, for example, the reaction of the throttle valve sensor will be as follows - the rpm will initially increase, but then the fuel mixture will start to get leaner, as a result of which low rpm will be established on a hot engine. There is only one reason for this - the amount of air consumed by the motor has decreased.
However, the opposite also happens - the fuel mixture is enriched, and the engine starts to pick up speed again. Such cycles can alternate endlessly, these are floating revolutions. The problem of low idle speed on a warm engine in winter is especially urgent.
On some cars, events can develop in a different way - the revolutions grow, for example, up to 2000 rpm, and they remain so. The reason is that the injector is injecting more fuel. The amount of air does not grow, otherwise the engine would be able to raise the revs up to 3 thousand, however, then it would still start to stall.
Fuel quality
When the idle speed drops on a warm engine, you should not write off the fuel. It is possible that the problem is not related to the electronics, sensors, or actuators. Maybe the whole point is that the driver fills with lower-octane gasoline, and the ECU is designed for high-octane grades. Hence the lean mixture, so the control unit has no choice but to work like this.
Possible reasons
So what is causing this problem? One 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 the idle speed sensor. You can often find it near the throttle body. It is a taper locking needle stepper motor. When the throttle is closed, air enters bypassing the damper through the idle channel, which is blocked by the needle.
Another culprit behind very low idle rpm is Air, the second important fuel mixture after gasoline. Therefore, if the mixture is poor enough, then there is nowhere to take large turns.
When the system malfunctions, the ECU cannot correctly select and calculate the proportions of the fuel mixture in the XX mode. As a result, the engine operation will be unstable, the speed will begin to fall and rise.
A less common problem with low idle speed on a warm engine can be the malfunctioning of the EGR system, or rather its valve. The element is installed in the intake manifold and its function is to discharge the exhaust gases. This is nothing more than Periodically, the sensor needs to be cleaned.
It will also not be superfluous to also make sure that there is no air leak in the system and check the condition of the throttle valve. Often the problem of low speed can be associated with a dirty damper or its mechanical damage, deformation. It often happens that, for one reason or another, the damper gets jammed - hence another reason for low speed.
Why do sensors die?
Experts identify two reasons for low idle speed. One of them is associated with poor fuel quality. Often, a low octane number not only contaminates the working surface of the sensor very much, but can also cause various malfunctions in the operation of electronic units.
In addition, sensors often fail due to a banal marriage or exceeding the service life. Inexpensive sensors may well be of low quality or defective. This is why low idle speeds appear on cars.
How to eliminate air leaks?
In order to exclude or confirm the leakage of excess unaccounted air into the system, check the tightness of the air supply system.
To do this, you can remove the air pipe and blow into it from the compressor or pump. The hose can be placed in water. This will reveal cracks and other defects.
How to check the idle speed sensor?
It is recommended to use a multimeter to check if the sensor is working properly. The verification procedure is very simple. Replace the resistance between the contacts in the sensor block. It is important that the ignition is on. The resistance between different pairs of contacts should be between 39.5 and 81 ohms. If during measurements the multimeter gives different readings, then the sensor should be replaced.
Checking the DMRV
So, first, to check, turn on the ignition. You need to check the voltage with a multimeter. Measure it between the contacts with the green and yellow wires. On different cars, the voltage can vary from 0.9 to 1.2 V. You can determine the output of the mass air flow sensor out of order and by the appearance of the candles - black carbon deposits indicate that it is better to replace it.
How do I clean the idle speed control (IAC)?
When there is a problem with low idle speed with a warm engine, in some cases it can be corrected by flushing the DHX. To do this, de-energize the vehicle. The regulator is located on the throttle assembly, below the TPS (throttle position sensor). Prepare a clean rag, screwdriver, liquid in a spray can - this can be any carburetor or injector cleaner.
Cleaning begins with dismantling - to remove it, simply unscrew the fastening screws. Bolts are sometimes found. Once the sensor has been removed from its seat, the cleaning process can begin. The work is carried out using a rag treated with a liquid from a can.
It is also necessary to spray from a can on the needle. The latter on various car models can be both metal and plastic. The cleaner will not damage the plastic. But the liquid should not get under the spring. If this does happen, it is recommended that the sensor be blown out with compressed air as soon as possible. If this is not done, then the fluid will wash out the internal lubricant, which will cause the IAC to fail completely.
Conclusion
As you can see, only a few sensors can provoke low engine speed at idle. But even one small element can significantly ruin the life of the car owner, especially if the speed does not always fall. But this is not a problem, because this issue can be solved easily, without large investments.
Almost every owner of domestic vases faced the problem of high idle speed. That is, when the engine is started, the rpm as expected is increased, however, when the engine warms up, it does not fall below 1500 or 1000 rpm, which is not normal. There may be several reasons for this - and incorrectly working TPS and idle speed regulator.
To fix the problem, you should diagnose the main units and components that affect the increase in speed.
Why there can be high idle speed
One of the main reasons may be the failure of the IAC, the idle speed regulator, it is he who is responsible for adjusting the engine speed at idle. When, the revolutions can "float", rise and fall spontaneously. With a complete failure of the sensor, the car may simply stall at idle speed.
Also, increased speed can be caused by a malfunction of the throttle position sensor (TPS). Over time, moisture gets under the sensor, which leads to the formation of oxides and rust on the regulator stem. To check this, you need to unscrew the sensor and carefully inspect it and the stem. If rust is found on them, they should be treated with penetrating grease or WD 40.
As a rule, the problem of increased speed on the VAZ 2110-12 lies precisely in these two sensors. Therefore, first of all, you need to pay attention to them.
Where are the IAC and TPS sensors located
So, first, let's check the IAC sensor. It is located on the throttle assembly below the TPS sensor. Dismantling it is very simple - remove the block from the sensor and use a Phillips screwdriver to unscrew the two bolts of its fastening. Then we take out the sensor or diagnose it, read about it below.
The throttle position sensor is located above the IAC and is also attached to two bolts. It can be unscrewed quite easily; there is no need to remove either the nozzle on the throttle or the throttle itself. Disconnect the block, unscrew the two bolts and pull out the sensor.
To make sure that the problem of high turnover is really in one of these sensors, and maybe in a friend at once, you should diagnose them.
Diagnostics of the PXX 2110 sensor
There are several ways. To check, we need a multimeter. First, let's describe the simplest way:
IAC check method 1
- Disconnect the block from the sensor and unscrew the sensor
- Turn on the ignition
- We connect the block to the removed sensor, the needle in the sensor should move out, if not, then the sensor is faulty
IAC check method 2
- Disconnect the negative terminal of the battery
- With a multimeter, we measure the resistance of the external and internal windings of the IAC, while the resistance parameters of contacts A and B, and C and D should have indicators of 40-80 Ohm.
- At zero values \u200b\u200bof the scale of the device, it is necessary to replace the IAC with a serviceable one, and if the required parameters are obtained, we check the resistance values \u200b\u200bin pairs B and C, A and D.
- The multimeter should detect an open circuit
- With such indicators, the IAC is serviceable, and if they are absent, the regulator must be replaced.
IAC check method 3
- Disconnect the block from the sensor
- Using a voltmeter, we check the voltage - "minus" goes to the engine, and "plus" goes to the terminals of the same block of wires A and D.
- The ignition is turned on, and the data obtained is analyzed - the voltage should be within twelve volts, if less then most likely there are problems with the battery charge, if there is no voltage, then you will have to check both the electronic control unit and the entire circuit.
- Then we continue the inspection with the ignition on, and one by one analyze the conclusions A: B, C: D - the optimal resistance will be about fifty three ohms; during normal operation of the IAC, the resistance will be infinitely high.
Diagnostics of DPDZ VAZ 2110
To diagnose the sensor, we need a voltmeter.
- It is necessary to turn on the ignition and check the voltage between the contact of the slider and the minus with a voltmeter. The voltmeter should be no more than 0.7 V.
- Now it is necessary to turn the plastic sector, thereby fully opening the damper, then again measure the voltage. The device should show at least 4 V.
- Turn off the ignition and disconnect the connector from the sensor. We check the resistance between the contact of the slider and some output.
- Slowly, turning the sector, watch the voltmeter readings. Make sure that the arrow moves smoothly and slowly, if you notice jumps - the throttle position sensor is faulty and must be replaced.
Symptoms of improper operation of TPS
- Deteriorating vehicle dynamics
- Floating idle
- Jerks during acceleration
- Increased idle speed
- Engine may stall at idle speed
If one or more of the above symptoms are found, the sensor should be checked and diagnosed as described above.
Which TPS sensor to choose for replacement
- DPDZ / 2110 / GM 2112-1148200 price from 300 rubles
- DPDZ / 2110 / PECAR 2112-1148200 price from 200 rubles
- DPDZ / 2110 / STARTVOLT VS-TP 0110 price from 200 rubles
- DPDZ / 2110 / HOFER HF 750 260 price from 150 rubles
- DPDZ / 2110 / CJSC Account Mash 2112-1148200-05 price from 400 rubles
- DPDZ / 2110 / OJSC RIKOR ELECTRONICS 2112-1148200 price from 300 rubles
Replacing the throttle position sensor VAZ 2110
Using a Phillips screwdriver, unscrew the two mounting bolts of the sensor, disconnect the block and remove the sensor.
If traces of rust or oxidation are found on the rod, which regulates the speed, it is necessary to clean it with a penetrating grease.
The owners of front-wheel drive VAZs have enough troubles during the entire operation of the car. One of the most annoying ones is high idle speed, moreover, on an already warmed up car. This problem is usually frustrating because there are too many reasons for its occurrence, and it is not easy to find them.
Let's list them.
- The most basic is a malfunction or failure of the mass air flow sensor.
- Breakdown of the idle speed control valve occurs no less often.
- A crankshaft position sensor giving incorrect information to the control unit can also become the root of high or floating idle speeds.
- The throttle position sensor may also be to blame.
- It happens that for some reason the gas pedal does not return to the end. Moreover, this happens both because of a banal malfunction of the cable, so because of something completely ridiculous - for example, after washing the car, the driver's mat was so covered that the tip of the mat began to touch the pedal.
- Air filter heavily clogged. Because of this, the combustion mixture turns out to be too rich in gasoline, again there are high rpm during idle.
- The cable flew off the throttle.
- Engine temperature sensor malfunction. It gives incorrect values \u200b\u200bto the "brains" of the car, they increase the crankshaft speed, thinking that the engine is cold.
As you can see, we have before us a whole forest of various reasons why high turnovers appear! Next, we will take a closer look at the most typical, plus the most common problems associated with the described problem. At the same time, we will figure out how to eliminate them with our own hands.
Ways to eliminate the "sore"
If such a nuisance occurs, it is necessary to search for which node is to blame analytically, checking all the specified sensors.
To begin with, consider the following option for correcting the problem situation. Suppose there were high revs at the VAZ 2110. Inspection of the suspects for faulty components showed that the throttle position sensor has traces of rust. It is located directly above the throttle valve. Measurements with a voltmeter showed that when the motor is idling, the voltage on it remains high, which means that it does not close the damper.
How do I fix the problem? For this we only need a screwdriver. We proceed with the procedure.
- Disconnecting the terminal block, as well as unscrewing two screws, dismantle the assembly.
- We notice that traces of rust inside interfere with the movement of the wheel that adjusts the position of the flap.
- We fill the insides of the defective device with a penetrating anti-rust aerosol.
- Scroll the wheel with a screwdriver for development.
- We assemble in the reverse order.
Check if the engine idle speed is now high. The problem should be fixed.
Now let's look at another case. Let's say we have an overestimated idle speed at a VAZ 2114. This is what we do when faced with this situation.
When clarifying the circumstances of the problem under study, we initially always check the operation of the idle sensor. This device consists of a needle embedded inside an electromagnetic coil. The needle either moves inside the coil, moving away from the orifice of the throttle tube, or extends, closing this hole, thereby stopping the supply of air for combustion of the mixture.
Also read about and.
This element is located at the throttle valve, opposite the gas pedal cable. To diagnose it, we pull out the terminal block from it, start the car, after which we see that our high engine speeds have not changed at idle. Then we remove this defective unit, then we clean it or replace it. For work we take:
- screwdriver;
- a toothbrush;
- petrol.
Begin.
- We unscrew the two screws. We take out the broken knot.
- We connect the wiring to it. We turn on the ignition. If the needle of the device is slightly pushed into the coil by touch, then it is serviceable.
- If the needle does not respond when an electric current is applied, wash the device with a toothbrush with gasoline.
- We do the assembly in the reverse order.
When you cannot restore the functionality of this node with your own hands, it is better to purchase a new one. Moreover, the cost of the spare part is low.
Other ways to fix
Of course, the options considered do not exhaust the possible ways of correcting the drawback when high revs are noticed precisely on a warm engine. To further explore the most common situations, let's look at the case of a malfunctioning mass air flow sensor. 
This device is responsible for supplying the correct portions of air for combustion of the mixture, and also feeds data to the electronic control unit about these portions, so that the unit can measure the supplied portions of gasoline.
Diagnostics of this node can be made as follows. It is necessary to disconnect the terminal block from our mass flow regulator, and then start the engine, after which it is necessary to drive at a crankshaft speed above 2000 rpm.
In this case, the emergency mode is automatically started, the portions of the mixture are now calculated only by the position of the damper. If the sensations showed that the car with the disabled sensor became more dynamic than with the connected one, then the malfunction of this unit is obvious. 
To replace it, take the following tools:
- phillips screwdriver;
- flat screwdriver.
We are starting repairs.
- After muffling the engine, disconnect the wires from the MAF sensor.
- After loosening the clamp, remove the hose on the inlet pipe.
- We dismantle the defective device by unscrewing two bolts.
- We are replacing the device.
- We do the assembly, moving backward point by point.
This is how this reason for high speeds is eliminated.
For some reason it didn't help
Now let's look at another such situation. The car owner changed, for example, the idle sensor, while the crankshaft speed became high, or it still remained elevated.
The reasons for this unpleasant phenomenon may be as follows.
- Most likely, the car enthusiast made a replacement just like that, at random, maybe he would stop turning too quickly. The real state of affairs suggests that the malfunction must be looked for elsewhere.
- If this is not a completely new sensor, it has an adjusting bolt, it may need to be tightened to adjust the problem node. Modern idle valves, when installed, do not need any additional adjustment. However, for example, if Priora has a high idle speed, then this car can look for an adjusting screw.
- It is possible that the new spare part turned out to be defective.
- The new part is incorrectly installed.
Here, perhaps, all the roots of the phenomenon are listed.
Let's talk about the cost
Not everyone can do this type of repair, like even reinstalling a sensor. Although the main difficulties are caused not so much by the substitution of one of the sensors involved in the process, but by the diagnostics of the sources of the overestimation of the crankshaft speed when idling. After all, we found out that the search for the causes of this disease is complicated by their diversity.
If the car enthusiast decides to contact the service station masters with a request to find the reason for the high engine speeds produced at idle speed, then the cost of diagnostics in large cities of the Russian Federation will be as follows.
| City | The cost |
| Moscow | RUB 700 |
| St. Petersburg | 650 RUB |
| Ekaterinburg | RUB 500 |
| Samara | RUB 500 |
| Krasnodar | RUB 550 |
Since the price of manipulation is low, then if the car owner doubts the success of his own diagnostics, he can safely contact the service station.
In the course of the article, we considered the main options for solving a common problem. Now, if a car enthusiast is faced with the manifestation of an overestimated idle crankshaft speed, he will already know what to do.
Now read about and.
