Many car enthusiasts have come across the concept of floating idle engine speed. For Lada Kalina, as practice shows, this is a frequent malfunction that you can fix yourself, but sometimes you need to use a car service.

Float idle rpm

After talking with the owners of the car, as well as with the craftsmen in the car service, we can conclude that floating engine speed on a car is a fairly common effect. As a result . Most motorists assure that this malfunction appears even during warranty service.

This can be due to many factors.

Consider the main causes of floating engine speed:

• Malfunction in the fuel system .

  Fuel system malfunction

• Ignition problems .

  Problems with the ignition switch or wiring

• ECU errors .

  Elimination of ECU errors

• Poor quality fuel .

  Low-quality gasoline directly affects the operation of the power unit

All these reasons are responsible for the appearance of such an effect. The most common cause is the appearance of injection problems.

Treatment methods

Before proceeding to fix the problem, it is worth noting that floating rpm is just the beginning, since untimely elimination of the malfunction can lead to the "start-stall" effect.

So, consider the sequence of actions to eliminate the causes of floating engine speed.

Fuel system

As practice and experience show, floating revolutions appear in the case of an uneven supply of fuel to the combustion chambers, or a constant change in the amount of the fuel mixture.

Cleaning the removed nozzle

This is primarily due to the injectors, which can be dirty. At the same time, it may not be felt when driving, but at idle, the tachometer will immediately show it. Therefore, it is necessary to dismantle and check the injectors on a special stand.

Clean mesh of the fuel pump

Also, a malfunction may be caused by a breakdown of the gasoline pump, which does not supply fuel evenly, or a clogged fuel filter. If necessary, replace the filter element and check the fuel pump.

We clean the throttle body

A change in the amount of the fuel mixture may be due to a clogged throttle or worn out air filter. Therefore, the filter element is changed as well.

Choke removed before and after cleaning

Ignition problems

Idling problems can occur due to incorrect operation of the ignition system. Namely, it could be related to a lock or wiring. So, it is worth checking and, if necessary, replacing damaged elements. It is best to change the ignition switch assembly, and the wires that go from it ring for operability.

ECU errors

Often, a car malfunction is associated with, as well as a malfunction of the controllers on the board. Of course, another reason could be the firmware that is out of order. Many car enthusiasts change their operating system, but this does not always help.

ECU removed from the car

As practice shows, a malfunction of an ECU can be a problem for the performance of many systems. Therefore, if it was not possible to eliminate the malfunction by the previous methods, it is necessary to replace the control unit. Of course, installing an operating system from Lada Kalina Sport K-Line can help, but the problem does not always disappear completely.

Poor quality fuel

In many cases, the poor quality of the filling can be the reason for the clogging of the fuel lines and injection systems, which in turn gives the effect of uneven fuel supply. To eliminate the malfunction, drain the old fuel, clean the fuel system and fill with new high-quality gasoline.

It should be understood that not only the operation of the engine, but also its durability depends on the quality of the fuel.

Float turns on Lada Kalina with "E-gas"

conclusions

Floating idle speed of the Lada Kalina engine can cause other, more serious problems. So, if such an effect occurs, it is necessary to find the cause and eliminate it. If you can't do it yourself, you need to contact a car service, where they will quickly find and fix the problem. Repeatedly, due to the constant effect of floating revs, car owners had me an electronic control unit.

Many car enthusiasts have come across the concept of floating idle engine speed. For Lada Kalina, as practice shows, this is a frequent malfunction that you can fix yourself, but sometimes you need to use a car service.

Possible malfunctions

Float idle rpm

After talking with the owners of the car, as well as with the craftsmen in the car service, we can conclude that floating engine speed on a car is a fairly common effect. As a result, the car may start to twitch when starting off. Most motorists assure that this malfunction appears even during warranty service.

This can be due to many factors.

Consider the main causes of floating engine speed:

• Malfunction in the fuel system.

  

  Fuel system malfunction

• Ignition problems.

  

  Problems with the ignition switch or wiring

• ECU errors.

  

  Elimination of ECU errors

• Poor quality fuel.

  

  Low-quality gasoline directly affects the operation of the power unit

All these reasons are responsible for the appearance of such an effect. The most common cause is the appearance of injection problems.

Treatment methods

Before proceeding to fix the problem, it is worth noting that floating rpm is just the beginning, since untimely elimination of the malfunction can lead to the "start-stall" effect.

So, consider the sequence of actions to eliminate the causes of floating engine speed.

Fuel system

As practice and experience show, floating revolutions appear in the case of an uneven supply of fuel to the combustion chambers, or

Cleaning the removed nozzle

This is primarily due to the injectors, which can be dirty. At the same time, it may not be felt when driving, but at idle, the tachometer will immediately show it. Therefore, it is necessary to dismantle and check the injectors on a special stand.

Clean mesh of the fuel pump

Also, a malfunction may be caused by a breakdown of the gasoline pump, which does not supply fuel evenly or a clogged fuel filter.... If necessary, replace the filter element and check the fuel pump.

We clean the throttle body

A change in the amount of the fuel mixture may be due to a clogged throttle or worn out air filter. Therefore, the filter element is replaced and the throttle valve needs to be cleaned.

Choke removed before and after cleaning

Ignition problems

Idling problems can occur due to incorrect operation of the ignition system. Namely, it could be related to a lock or wiring. So, it is worth checking and, if necessary, replacing damaged elements. It is best to change the ignition switch assembly, and the wires that go from it ring for operability.

ECU errors

Often, a car malfunction is associated with errors in the electronic control unit, as well as a malfunction of the controllers on the board. Of course, another reason could be the firmware that is out of order. Many car enthusiasts change their operating system, but this does not always help.

ECU removed from the car

As practice shows, a malfunction of an ECU can be a problem for the performance of many systems. Therefore, if it was not possible to eliminate the malfunction by the previous methods, it is necessary to replace the control unit. Of course, installing an operating system from Lada Kalina Sport K-Line can help, but the problem does not always disappear completely.

Poor quality fuel

In many cases, the poor quality of the fuel poured into the car's tank can cause clogging of the fuel lines and injection systems, which in turn gives the effect of uneven fuel supply. To eliminate the malfunction, drain the old fuel, clean the fuel system and fill with new high-quality gasoline.

It should be understood that not only the operation of the engine, but also its durability depends on the quality of the fuel.

Float turns on Lada Kalina with "E-gas"

conclusions

Floating idle speed of the Lada Kalina engine can cause other, more serious problems. So, if such an effect occurs, it is necessary to find the cause and eliminate it. If you can't do it yourself, you need to contact a car service, where they will quickly find and fix the problem. Repeatedly, due to the constant effect of floating revs, car owners had me an electronic control unit.

Idling is the operating mode of the engine in which the gearbox is isolated from it. In this case, the throttle valve is in the closed position. This mode is designed to warm up the engine to the operating temperature of the functioning of all ICE systems (internal combustion engine). When the gas pedal is released, the engine speed is maintained by the idle speed control (IAC). It is this device on the Lada Kalina that provides a minimum amount of air-fuel mixture in the cylinders.

Where is IAC located and how it works

The Kalina idle speed sensor has four main functions:

1. Maintaining a certain number of engine revolutions.
2. Providing conditions for starting the engine in winter at negative temperatures. This means that the IAC can increase revs in order to warm up the engine faster. As the operating temperature is reached, the speed gradually decreases.
3. Maintaining minimum engine speed when the gas pedal is released. Many motorists underestimate this feature until problems with starting and engine instability begin.
4. Creation of a fuel-air mixture with the desired percentage of fuel and air. This ensures optimal fuel consumption and stable operation of the power plant.

Since the IAC is responsible for supplying air to the cylinders, it is located on the throttle assembly. The regulator on almost all naturally aspirated gasoline engines is located next to the throttle position sensor, and Kalina is no exception.

The principle of operation of the IAC

When the engine is running without increasing speed, that is, at idle speed, a minimum volume of air enters the combustion chambers of the cylinders. This occurs regardless of whether the throttle valve is in the closed position. The intake air intake is monitored and measured by the Mass Air Flow Sensor (MAF), which sends data to the ECU.

Based on the information received, the control unit supplies the required amount of fuel to the cylinders through the injectors. At the same time, the controller monitors the revolutions of the crankshaft by its position sensor (DPKV). According to the data obtained, the IAC needle opens or closes, controlling the air supply past the throttle valve, which at this stage does not participate in the operation of the motor.

If the engine has not yet reached the set temperature, the controller with the help of the IAC increases the air supply, increasing the crankshaft speed for faster warming up of the power unit. Thanks to this mode, the car can start moving almost immediately, without the need to reach operating temperatures.

Technically, the IAC is not a sensor, it is an executive tool, so the controller cannot diagnose its malfunction. This means that the "Check Engine" icon will not light up on the dashboard if the regulator breaks down. In terms of their symptoms, IAC malfunctions are similar to TPS (throttle position sensor) malfunctions. But in the case of the latter, the icon will definitely light up, signaling engine malfunctions.

IAC malfunction symptoms

Among the signs that directly or indirectly indicate the incorrect operation of the idle sensor, the following can be distinguished:

• the engine does not start well - it becomes impossible to start the engine without pressing the gas pedal;
• when shifting to a neutral gear, there are "dips" in revolutions and their instability;
• when shifting gears, the speed falls or the engine stalls altogether;
• the motor does not warm up well at negative temperatures, since the increased speed (1500 rpm) is not achieved;
• after turning on the power consumers (high beam, heater, air conditioner), the revolutions begin to "sink" or "float";
• the engine spontaneously increases and decreases revs.

The IAC cannot be repaired, the device must be replaced. Before changing the idle speed regulator, it is advisable to flush the throttle assembly.

How to check the regulator

There are many ways to diagnose IAC. The most effective and simple methods for checking the Kalina idle speed regulator:

1. RHX routine testing for performance. To do this, the device must be removed from the throttle assembly and the terminal block must be connected, if it was disconnected for dismantling. After that, you need to start the engine. At the moment of starting, the needle of a working device should protrude. If this is not observed, the regulator is broken.
2. Checking the supply of the required voltage to the sensor. It is necessary to disconnect the terminal block from the IAC and connect a voltmeter to the terminals. After that, one person turns on the ignition, and the second measures the resistance at all terminals of the block. In the absence of faults, the voltmeter reading should be approximately 50 ohms. The voltage should be at the level of 12 V. If it is significantly less, this indicates a battery malfunction or an open circuit in one of the sections.
3. Measuring the resistance of the inner and outer windings of the regulator. To do this, you need to use a multimeter. The measurement results should not be below 40 ohms and above 80 ohms. If you deviate from the specified range, the idle speed regulator must be changed.

Knowing the symptoms of malfunctions, you can diagnose IAC malfunctions in a timely manner and take measures to eliminate them. Although the regulator is beyond repair, it is worth trying to clean it. In some cases, this is enough.

Cleaning IAC

The work on troubleshooting the idle speed controller with your own hands consists in its banal flushing from carbon deposits. To do this, follow the instructions:

• disconnect the wire chip from the sensor;
• unscrew the two fastening screws with a small curly screwdriver and remove the sensor from the seat;
• use WD-40 or carburetor cleaner to rinse the needle taper.

With the same means, you can wipe the contacts of the regulator and the entire throttle assembly.

Throttle valve

When the driver presses down on the accelerator pedal, the throttle valve opens, allowing more air into the combustion chambers. Oxygen is mixed with fuel, after which the prepared mixture is burned. The more the driver presses on the gas pedal, the wider the throttle opens and the more air enters. But often soot accumulates on the walls of the damper, and its loose closure causes disturbances in the operation of the power plant.

The throttle assembly is located behind the engine air filter. This arrangement is typical not only for Lada Kalina, but also for many other cars. Depending on the engine type, the operation of the damper can be controlled by an electronic accelerator pedal or a cable drive.