VAZ 2110 high idle speed reason

Many motorists have experienced high engine speeds when idling. But not all car enthusiasts know why this happens, much less how to solve the problem without contacting a car service center. The article will help you analyze the issue in more detail, as well as find ways to solve the problem.

Ways to eliminate the “sore”

How to fix the problem? For this we only need a screwdriver. Let's begin the procedure.

1. By disconnecting the terminal block and also unscrewing two screws, we dismantle the assembly.
2. We notice that traces of rust inside interfere with the movement of the wheel that regulates the position of the damper.
3. We fill the insides of the defective device with a penetrating anti-rust aerosol.
4. Use a development screwdriver to turn the wheel.
5. We reassemble in reverse order.

Check to see if the engine idle speed is now high. The problem should go away.

Now let's look at another case. Let's say we have high idle speed in a VAZ 2114. This is what we do when faced with this situation.

When clarifying the circumstances of the problem under investigation, we always initially check the operation of the idle speed sensor. This device consists of a needle built inside an electromagnetic coil. The needle either moves inside the coil, moving away from the hole in the throttle pipe, or moves out, closing this hole, thereby stopping the supply of air for combustion of the mixture.

Also read about adjusting engine idle speed and repairing a Tavria car muffler with your own hands. 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 we still have high engine speeds that have not changed at idle. Then we remove this defective unit, then clean it or replace it. For work we take:

1. Unscrew the two screws. We take out the broken node.
2. We connect the wiring to it. Turn on the ignition. If the needle of the device moves slightly inside the coil to the touch, then it is working.
3. If the needle does not react when an electric current is applied, wash the device with a toothbrush using gasoline.
4. We do the assembly in reverse order.

When you cannot restore the functionality of this unit with your own hands, it is better to purchase a new one. Moreover, the cost of spare parts is low.

Other fixes

This node can be diagnosed 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 the crankshaft speed above 2000 rpm.

In this case, the emergency mode is automatically launched, portions of the mixture are now calculated only by the position of the damper. If the sensations show that the car with the disconnected sensor has become 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.

1. After turning off the engine, disconnect the wires from the mass air flow sensor.
2. Loosen the clamp and remove the hose on the inlet pipe.
3. We dismantle the defective device by unscrewing two bolts.
4. We are replacing the device.
5. We do the assembly, moving backwards point by point.

This is how this cause of high revs is eliminated.

For some reason it didn't help

Now let's look at another situation. The car owner changed, for example, the idle speed sensor, and the crankshaft speed became high, or remained high as before.

The reasons for this unpleasant phenomenon may be as follows.

1. Most likely, the car enthusiast made the replacement just like that, at random, maybe it would stop turning too quickly. The real state of affairs suggests that the fault needs to be looked for elsewhere.
2. If this sensor is not a completely new model, it has an adjusting bolt, it may need to be tightened in order to adjust the problem unit. Modern idle air valves do not require any additional adjustment when installed. However, for example, if the Priora has high idle speeds, then you can look for the adjusting screw on this car.
3. It is possible that the new spare part was defective.
4. The new spare part was installed incorrectly.

Why is the engine idling high?

Owners of front-wheel drive VAZs have enough troubles throughout the entire operation of the car. One of the most annoying is high idle speeds, moreover, on an already warmed-up car. This problem usually causes annoyance because there are too many reasons for its occurrence, and finding them is not easy.

First, let's consider the following option for correcting the problem situation. Let's assume that a VAZ 2110 has high revs. An examination of the suspected components 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 engine is idling, the voltage on it remains high - which means it does not close the damper.

How to fix the problem? For this we only need a screwdriver. Let's begin the procedure.

1. By disconnecting the terminal block and also unscrewing two screws, we dismantle the assembly.
2. We notice that traces of rust inside interfere with the movement of the wheel that regulates the position of the damper.
3. We fill the insides of the defective device with a penetrating anti-rust aerosol.
4. Use a development screwdriver to turn the wheel.
5. We reassemble in reverse order.

Check to see if the engine idle speed is now high. The problem should go away.

Now let's look at another case. Let's say we have high idle speed in a VAZ 2114. This is what we do when faced with this situation.

When clarifying the circumstances of the problem under investigation, we always initially check the operation of the idle speed sensor. This device consists of a needle built inside an electromagnetic coil. The needle either moves inside the coil, moving away from the hole in the throttle pipe, or moves out, closing this hole, thereby stopping the supply of air for combustion of the mixture.

Also read about adjusting engine idle speed and repairing a Tavria car muffler with your own hands. 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 we still have high engine speeds that have not changed at idle. Then we remove this defective unit, then clean it or replace it. For work we take:

• screwdriver;
• toothbrush;
• petrol.

Begin.

1. Unscrew the two screws. We take out the broken node.
2. We connect the wiring to it. Turn on the ignition. If the needle of the device moves slightly inside the coil to the touch, then it is working.
3. If the needle does not react when an electric current is applied, wash the device with a toothbrush using gasoline.
4. We do the assembly in reverse order.

When you cannot restore the functionality of this unit with your own hands, it is better to purchase a new one. Moreover, the cost of spare parts is low.

Other fixes

Of course, the options considered do not exhaust the possible ways to correct the shortcoming when high speeds are noticed precisely on a warm engine. To further study 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 provides data to the electronic control unit about these portions, so that the unit proportions the supplied portions of gasoline.

This node can be diagnosed 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 the crankshaft speed above 2000 rpm.

In this case, the emergency mode is automatically launched, portions of the mixture are now calculated only by the position of the damper. If the sensations show that the car with the disconnected sensor has become 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 renovations.

1. After turning off the engine, disconnect the wires from the mass air flow sensor.
2. Loosen the clamp and remove the hose on the inlet pipe.
3. We dismantle the defective device by unscrewing two bolts.
4. We are replacing the device.
5. We do the assembly, moving backwards point by point.

This is how this cause of high revs is eliminated.

For some reason it didn't help

Now let's look at another situation.
The car owner changed, for example, the idle speed sensor, and the crankshaft speed became high, or remained high as before. The reasons for this unpleasant phenomenon may be as follows.

1. Most likely, the car enthusiast made the replacement just like that, at random, maybe it would stop turning too quickly. The real state of affairs suggests that the fault needs to be looked for elsewhere.
2. If this sensor is not a completely new model, it has an adjusting bolt, it may need to be tightened in order to adjust the problem unit. Modern idle air valves do not require any additional adjustment when installed. However, for example, if the Priora has high idle speeds, then you can look for the adjusting screw on this car.
3. It is possible that the new spare part was defective.
4. The new spare part was installed incorrectly.

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

Let's talk about cost

Not everyone can afford this type of repair, such as even reinstalling a sensor. Although the main difficulties are caused not so much by replacing one of the sensors involved in the process, but by diagnosing the sources of overestimation of the crankshaft speed when idling. After all, we have found that the search for the causes of this disease is complicated by their diversity.

If a car enthusiast decides to contact a service station with a request to find the cause of high engine speeds at idle, then the cost of diagnostics in major cities of the Russian Federation will be as follows.

City	Price
Moscow	700 rub.
St. Petersburg	650 rub.
Ekaterinburg	500 rub.
Samara	500 rub.
Krasnodar	550 rub.

Since the cost of manipulation is low, if a car owner doubts the success of a manual diagnosis, he can safely contact a service station.

Throughout the article, we looked at the main options for solving a common problem. Now, if a car enthusiast encounters an increase in idle crankshaft speed, he will already know what to do.

Now read about replacing the driveshaft crosspiece on a Gazelle and repairing the starter retractor relay with your own hands.

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Why might there be high idle speed?

One of the main reasons may be the failure of the IAC, the idle air regulator, which is responsible for adjusting the engine speed at idle. If the sensor is faulty. revolutions can “float”, rise and fall spontaneously. If the sensor completely fails, the car may simply stall at idle.

Also, increased speeds 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 oxide and rust on the regulator rod. To check this, you need to unscrew the sensor and carefully inspect it and the rod. If rust is found on them, they should be treated with penetrating lubricant 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.

High engine speed at idle: reasons

As you know, high speeds when starting the engine are normal, because the engine is in warm-up mode. But what should you do if they don’t fall, even when the engine has already warmed up? On a warm engine, increased idle speed is abnormal, and it is worth starting to look for the cause of this effect.

First of all, it is worth noting that the consequences of such intense engine operation can be very diverse. So, what can happen to the engine: an increase in temperature, which will lead to overheating. This will cause the cylinder head to deflect. Further, high speeds will lead to a large production of parts inside the power unit itself. This can significantly reduce the life of the motor.

So, what are the reasons for the appearance of high internal combustion engine speeds on the engine in idle mode:

• IAC sensor.
• Throttle position sensor.
• Throttle valve.
• Engine temperature sensor.
• Air leaks through the intake manifold.
• ECU problems.

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 securing it. Then we pull out the sensor or perform diagnostics on it, read about this below.

The throttle position sensor is located above the IAC and is also secured with two bolts. It unscrews quite easily; there is no need to remove either the pipe 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 with high speed is really in one of these sensors, and maybe in each other at once, you should diagnose them.

Methods for solving the problem

Before proceeding directly to the process of solving the problem, you need to understand that diagnostics and repair of these components should be performed only with knowledge of the matter. Also, it is worth separately noting that for a carburetor and injection engine there will be different diagnostic methods, but the principle of the causes is the same.

So, it is worthwhile to consistently understand the diagnostic and repair work that will eliminate high idle speed.

IAC sensor

It is not often possible to find an idle air control sensor on carburetor engines. This is usually done using a quality and quantity screw. To normalize high idle speeds, you should not carry out the process cold. First, you should warm up the engine to operating temperature, and only then begin adjustments. If after making the adjustments the speed remains high, then the reason is different.

For an injection engine, the opposite is true; all adjustments are made by the IAC sensor. In order to correct the malfunction, it is worth checking the sensor with a multimeter, and then, if the element is faulty, replace it with a new one. A malfunction of this sensor may cause the idle speed to jump.

TPDZ

The wrong amount of air entering the combustion chamber can cause the ECU to over-idle. If the throttle position sensor is faulty, it must also be checked. This can be done with a multimeter or oscilloscope. If it is discovered that the TPS is faulty, it is worth replacing it.

Throttle valve

A stuck throttle can cause a large amount of air to enter the engine. This fact will force the electronic control unit to increase the amount of fuel injected to balance the mixture. This will increase the fuel consumption and accordingly.

In order to solve the problem, it is necessary to dismantle the unit and clean it using special means. If cleaning does not give the desired result, the throttle must be replaced, but you should be prepared that this will not be cheap.

Motor temperature sensor

A failure of the temperature sensor can lead to many problems. One of these will be an increase in idle speed. Typically, as practice shows, this sensor is the most vulnerable and most often fails because it is exposed to temperature changes.

First, it’s worth diagnosing the health of the unit. This can be done using a multimeter and an oscilloscope. If the unit is faulty, it should be replaced. After this, it is recommended to reset all ECU errors.

Collector

Often, due to the use of the vehicle, the intake manifold becomes deformed or the gasket wears out. Thus, an increase in idle speed may indicate that there is an air leak in the manifold. To treat the malfunction, you will have to dismantle the part, which is quite problematic, since almost the entire injection system and several components of other systems are attached to the manifold.

It is worth examining the manifold gasket in detail; the presence of damage may indicate not only problems with speed, but also other malfunctions. Also, deformation of the cavity can cause excess air to enter the combustion chambers. This can affect warming up, engine starting and other factors.

To fix the problem, you will have to grind the surface of the collector until it is smooth. In car services, this is done using a special machine. Of course, you can carry out the process in a garage, using a special stone, but this is not always possible for car owners.

Electronic control unit

Repeatedly high idle speed is a consequence of incorrect operation of the electronic control unit. So, to troubleshoot a problem, you will have to connect to the “brains” and fix the problem at the software level. To complete the process you will need a special cable and software.

But simply resetting errors does not always help; you often have to change the software in order for all the problems to finally go away. It is recommended to trust this process to masters who are professionals in their field.

Along with replacing the firmware, you can increase the power characteristics, which is also recommended to be entrusted to specialists. As practice shows, most car enthusiasts, when independently tampering with the ECU, end up in a car service center to eliminate the consequences of their own modifications.

Diagnostics of the IAC sensor 2110

There are several ways to check the idle speed control. To check we need a multimeter. First, let's describe the simplest way:

IAC check method 1

1. Disconnect the block from the sensor and unscrew the sensor
2. Turn on the ignition
3. 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

1. Disconnect the negative terminal of the battery
2. Using 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 be 40-80 Ohms.
3. If the instrument scale is zero, it is necessary to replace the IAC with a serviceable one, and if the required parameters are obtained, we check the resistance values ​​in pairs B and C, A and D.
4. The multimeter should detect an open circuit
5. With such indicators, the IAC is serviceable, and if they are absent, the regulator must be replaced.

IAC test method 3

1. Disconnect the block from the sensor
2. Using a voltmeter, we check the voltage - the “minus” goes to the engine, and the “plus” to the terminals of the same block of wires A and D.
3. The ignition is turned on, and the received data 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.
4. Then we continue the inspection with the ignition on, and analyze terminals A:B, C:D one by one - the optimal resistance will be about fifty-three ohms; During normal operation of the IAC, the resistance will be infinitely high.

How to eliminate high speed when cold

Eliminating the problem of high speed when starting a cold engine always depends on the reasons. Accordingly, depending on the failed unit, it will be necessary to carry out a number of checks and repair measures.

First of all, check the condition of the throttle valve and its operation. Over time, a significant amount of carbon deposits accumulates on its surface, which should be removed using a carb cleaner or other similar cleaning agent. As they say: “In any unclear situation, clean the throttle valve.” The rod may also jam in the air channel. Depending on the design of a particular engine, their control system can be mechanical or electronic.

If the design involves the use of a drive cable, then it would be a good idea to check its integrity, general condition, and tension force. When the damper is controlled using various electric drives or solenoids, it is worth checking them with a multimeter. If you suspect a malfunction of any of the sensors, it should be replaced with a new one.

If there are corresponding symptoms, it is imperative to check the fact of air leaks in the intake tract at the connection points.

It is also worth paying attention to the cooling system, in particular its elements such as a thermostat and pump. You can accurately determine if the thermostat is not working correctly by the poor operation of the stove. And if there are problems with the pump, leaks or extraneous noise will be visible.

Conclusion

It is necessary to understand that short-term high speeds on a cold engine are normal. And the lower the ambient temperature, the longer the increased speed will take place. However, if the time exceeds approximately five minutes or more, then this is already a reason to perform diagnostics. First of all, you need to scan the memory of the electronic control unit for errors in it. These could be errors in the idle speed controller or the sensors listed above. If there are no errors, you need to perform additional mechanical diagnostics according to the recommendations described above.

Diagnostics of TPS VAZ 2110

To diagnose the sensor we need a voltmeter.

1. It is necessary to turn on the ignition and check the voltage between the slider contact and the minus with a voltmeter. The voltmeter should read no more than 0.7 V.
2. Now you need to turn the plastic sector, thereby completely opening the damper, then measure the voltage again. The device must show at least 4 V.
3. Turn off the ignition and disconnect the connector from the sensor. We check the resistance between the slider contact and some terminal.
4. Slowly, turning the sector, monitor the voltmeter readings. Make sure that the needle moves smoothly and slowly; if you notice jumps, the throttle position sensor is faulty and must be replaced.

Symptoms of TPS malfunction

• Deterioration of vehicle dynamics
• Floating idle speed
• Jerking during acceleration
• Increased idle speed
• The engine may stall at idle

Why does the VAZ 2110 speed fluctuate?

There are several typical reasons why XX does not maintain stable speed.

• Idle air control;
• Throttle position sensor;
• Mass air flow sensor;
• Injectors;
• Filter;
• Air leak;

As you can see, there are not many reasons for this problem, but they all have a significant impact on the operation of the engine. Let's look at each of the reasons in more detail.

Idle speed control

This sensor is installed in the throttle body of the car and serves to open and close the air supply channel necessary for idling. It is a motor that operates on direct current and has a shaft with a worm gear on which a cone valve is mounted. The valve regulates the air supply in the required proportions for stable operation of the internal combustion engine at idle.

Quite often, the IAC jams, which leads to incorrect formation of the fuel mixture at idle, which is why the speed begins to float and engine operation becomes unstable. If you find such a problem on your car, you must first check the IAC.

It is also worth paying special attention to the sealing ring; it very often loses its physical properties and begins to let air through, which also leads to unstable operation of the internal combustion engine.

Damper position sensor

It is installed on the throttle assembly, like the IAC. Responsible for indicating the opening angle of the damper. If it breaks down, the idle speed can spontaneously jump to 2500 rpm and immediately drop to 500 rpm. This occurs due to rubbing of the contact part inside the sensor; this problem is “cured” by replacing the TPS with a new one, since its price is low.

Mass air flow sensor

This sensor is located on the air filter box. When it becomes dirty or aging, it quite often transmits incorrect readings to the engine control unit, which leads to unstable operation of the internal combustion engine. The cost of the sensor is steep, so it is recommended to remove the sensor from a working car and try to install it on your own.

Injectors

Injectors are quite picky about the quality of fuel; during operation, the injector sprays fuel in the required proportions. When contaminated, the injector spray becomes uneven, which leads to incorrect mixing of fuel with air and, consequently, to floating idle speed. This problem can be corrected by flushing the injectors.

Filter

Fuel and air filters directly affect engine performance. If a dirty air filter on a car can significantly reduce the power of a car engine, then chewed fuel filters lead to unstable operation of the internal combustion engine in all its operating modes. It is recommended to replace fuel filters at least once a year.

Air leak

The most extensive and problematic breakdown in a car is solved. Solving this problem is not easy due to the difficulty of detecting the source of the leak. The tightness of the car system must be absolutely everywhere. If air leaks appear somewhere that is not taken into account by the mass air flow sensor (i.e. after the sensor), this leads to unstable operation of the internal combustion engine.

You can check the car for air leaks by unscrewing the mass air flow sensor from the air filter box and turning off the air supply with the engine running. A working car should stall, and the rubber corrugation should compress and remain in a compressed position for quite a long time. If the corrugation immediately straightens out, this indicates an air leak in the system, which clearly leads to floating idle speed of the VAZ 2110.

Which TPS sensor to choose for replacement

For stable and long-term operation of the sensor, we advise you not to buy too cheap analogues of questionable quality. The factory installed throttle position sensor was GM 2112-1148200 .

• DPDZ /2110/ GM 2112-1148200 price from 300 rub.
• DPDZ /2110/ PEKAR 2112-1148200 price from 200 rub.
• TPDZ /2110/ StartVOLT VS-TP 0110 price from 200 rub.
• TPDZ /2110/ HOFER HF 750260 price from 150 rub.
• DPDZ /2110/ CJSC Account Mash 2112-1148200-05 price from 400 rub.
• DPDZ /2110/ JSC RIKOR ELECTRONICS 2112-1148200 price from 300 rub.

Injector. Causes of high idle speed.

On an injection engine, the controller controls the idle speed depending on the engine temperature. The actuator for this is the idle speed regulator, which is installed on the throttle assembly.

When the engine is cold, the speed is higher and decreases as it warms up. This is necessary so that the engine warms up faster and runs stably.

Reasons for increased turnover.

Idle speed regulator.

On VAZ cars this is a stepper motor that has two windings and four contacts in the connector. One winding is used for the rod to move out of the body, and the second for the rod to enter the body. A cone valve is installed on the rod to regulate the air supply through the channel in the throttle assembly.

When the engine is running, the rod may jam and the controller will not be able to control the idle speed. In order to check the regulator without special instruments, you need to remove it from the throttle assembly and test the windings with a multimeter. Next you need to determine whether the rod moves. To do this, you need to apply power to one of the regulator windings. This needs to be done as follows: connect two wires to the battery, and periodically changing the polarity, touch the two contacts on the regulator that correspond to one winding. In this case, the rod must either enter the body or extend out of it. If so, then the regulator is working.

In order to extend the life of the regulator, you need to lubricate its rod.

Throttle position sensor.

Just like the regulator, it is installed on the throttle assembly and has three contacts in the block. Two contacts power the third output signal. The sensor resistance changes depending on the throttle position, that is, in fact, this sensor is a variable resistor. You can check it by connecting the multimeter probes to two contacts, and smoothly opening the throttle to see how the resistance of the sensor changes. It should smoothly decrease without jumps when opening and increase when closing.

If the throttle cable is too tight, the idle speed will freeze.

The throttle assembly must be clean inside, otherwise the throttle valve will become stuck on deposits and the idle speed will also increase.

Engine temperature sensor.

This is a thermistor whose resistance changes depending on temperature. If it is not working properly, the idle speed will not be adjusted correctly. You can check it as follows. You need to compare the engine temperature with the sensor resistance and see in the table whether these parameters correspond to each other. Due to poor contact in the connector of this sensor, the speed may also fluctuate. When the engine is running, you need to move this connector and monitor the revolutions; if they change, then it’s the problem.

Source

Replacing the Throttle Position Sensor on a VAZ 2110

Using a Phillips screwdriver, unscrew the two sensor mounting bolts, 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 penetrating lubricant.

Next, a new sensor is installed, the block is connected and the idle speed is checked.

Clogged injectors

If the injectors are dirty or clogged, this will certainly increase the engine speed. The main cause of the malfunction is the use of low-quality fuel. And if this is really the problem, then it’s worth cleaning the injectors.

These are perhaps the most common reasons that can cause an increase in engine speed when idling. You can find out about others in this article. I hope this information will help solve the problem with the idle speed of your car.

Source

Which IAC sensor to choose for replacement?

2112.1148300-04 was installed on cars 2110-12 . If for some reason you cannot buy a factory one, you can install an analogue sensor from other manufacturers.

• РХХ /2110-12/ engineer. (2112.1148300-04) factory (KZTA, Kaluga) price from 600 rub.
• РХХ /2110-12/ engineer. FENOX SIP10100O7 price from 300 rub.
• РХХ /2110-12/ engineer. HOFER HF 750381 price from 250 rub.
• РХХ /2110-12/ engineer. MANOVER MR-2112-1148 price from 350 rub.
• РХХ /2110-12/ engineer. StartVOLT VSM 0112 price from 450 rub.

Replacing the IAC sensor VAZ 2110

Disconnect the block from the sensor

Using a Phillips screwdriver, unscrew the two mounting bolts and pull out the sensor

We install the new one in the reverse order.

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[Closed] Solved: High revs and won't go down

Topic: Resolved: High RPM and won't go down

I encountered the same problem when switching the speed to neutral or just when you give gas, the revolutions stand at about 2000 or more and do not fall. The car also jerks when you switch from 1st to 2nd gear. The car never stalls, and there is never any sign in the instrument panel megal "CHECK ENGINE". I would like to know what is the reason, the sensors? And which sensor is damaged? The THROTTLE sensor? or IDLE CONTROL?

2 Reply from Admin 2012-05-25 09:45:32

• Admin
• Administrator
• Inactive

• Registration: 2012-02-20
• Messages: 3,257 Thanks : 622

Re: Solved: High revs and won't go down

Here's about TPS, how to check what's wrong.

3 Reply from Alexander 2012-05-25 09:56:31

Re: Solved: High revs and won't go down

Here's about TPS, how to check what's wrong.

There are a few differences, for example the engine never stalled.

Added: 2012-05-25 10:56:31

but I can’t measure it, I don’t have an ohmmeter, because I’m not good with electricians ((

4 Reply from Admin 2012-05-25 10:58:45

• Admin
• Administrator
• Inactive

• Registration: 2012-02-20
• Messages: 3,257 Thanks : 622

Re: Solved: High revs and won't go down

the engine never stalled

it may not stall

try to determine by diagnosing the car or replacing the part with a known working one.

Unfortunately, it’s impossible to tell 100% from the symptoms what exactly went wrong.

5 Reply from volodyaw87 2012-05-25 14:02:14

Re: Solved: High revs and won't go down

I went for diagnostics, you can see the percentage of closing the throttle position on it.

6 Reply from Maxim 2012-05-25 17:57:44 (2012-05-25 17:58:26 edited by Maxim)

• Maxim
• Local
• Inactive

• From: Arkhangelsk region. Velsk
• Registration: 2012-03-16
• Messages: 472 Thanks : 229
• Car: VAZ 21124

Re: Solved: High revs and won't go down

Usually, when the TPS is faulty, the check light does not come on, but the symptoms are the same as you describe

When the IAC is running, you remove the chip; if it stalls or the speed remains the same, the regulator is dead. If you've grown up, good!

We put the IAC connector back on and remove the chip from the MAF, if the speed has increased, the MAF is serviceable, and if it stalls, it is dead.

We put the DPZD connector back on and remove it from the mass air flow sensor. If the engine picks up speed on its own, the TPS is working; if it stalls, it’s dead.

7 Reply from Alexander 2012-06-01 11:12:37

Re: Solved: High revs and won't go down

The problem is solved. I replaced the DPS, bought Rikor Electronics OJSC, Arzamas. I've been driving for a week so far, everything is ok.

Thanks said: Admin 1

Reasons for a carbureted engine

Nowadays, fewer and fewer carburetor cars are produced, but they are still quite common in our country. Most of their problems, for example - maintaining high speeds and not reducing them, are similar to the problems of injection engines, so I start with carburetor ones. Video about this problem If such a problem occurs, the owner should immediately check the following details:

• Adjustment of the system that serves to maintain idle speed. Perhaps something was out of adjustment due to vibration, or they forgot to make adjustments after repairing the carburetor, or other procedures associated with it. If it was recently adjusted, it means that the ratio of the fuel-air mixture was not set correctly.
• Check the operation of the throttle valve; it may not open/close well, which is caused by carbon deposits on it. If necessary, the valve should be cleaned; if it is cracked or chipped, then replace it or the entire carburetor. Also check the free play of the damper control cable so that it does not jam or get snagged.
• When the needle valve is stuck, fuel flows unevenly, depending on the position in which it stops, the speed can either increase or decrease.
• The cylinder head gasket has burned out. This is just a replacement. The easiest way to check is by starting the engine, opening the hood and removing the radiator cap. White smoke coming from under it is definitely a gasket burnout.
• The choke does not close. To make sure of this, we check whether the damper located in the primary chamber is working. If it jams, then the issue is resolved by lubricating the damper and its cable.

This is the reason for the high idle speed of carburetor engines.

Don't forget about another probable reason for any type of engine, this is when the gas pedal in the car gets stuck and it does not return to its normal position.

Eliminating high idle speed of VAZ 2110

The problem of idle speed on domestic VAZs was one of the pressing issues for their owners during the entire period of operation of the vehicle. On various Internet forums you can often see discussions where participants complain about high or floating idle speeds . The VAZ 2110 is no exception. In this article we will look at how to quickly fix the problem of high idle speed on the engine of a VAZ 2110 car.

Throttle sensor

If the TPS is faulty, then the VAZ car often begins to work unstably. The main signs of a problem include:

• floating speed at idle;
• speed reduction;
• jerky acceleration;
• sudden engine shutdown.

The sensor in question most often fails for the following reason - abrasion of the coating on the base. This prevents the signal from reaching the controller, which causes the motor to malfunction. Failure of the slider leads to a similar result. Any of these problems can be recognized visually.