Floats on VAZ-2114 - causes and methods of elimination

The problem with floating turns can arise for every car owner. And it does not matter whether the carburetor is an engine or an injector. The reasons for sharp jumps in speed can be quite a lot. And today we will consider the situation when the turnover on the VAZ-2114 is floating, and also how this problem can be solved.

Engine ECU

Very often the cause of this trouble is precisely the "brain" of the car, that is, the electronic control unit. If any sensor that is responsible for the correct operation of the internal combustion engine fails or when external air penetrates, the computer can not give a specific and precise command to the system, which leads to the appearance of floating revolutions. In this case, you should go to the service center and diagnose the computer, since it is unlikely that you can determine error and fault codes without special tools and instruments.

Sensors and their malfunctions

Of course, if the ECU issues the wrong commands, it does not mean that it failed. The cause of the breakdown should be sought in the following sensors:

1. РХХ (regulator of idling).
2. DMRV (mass air flow sensor).
3. EGR.

It is because of these details that the speed at VAZ-2114 is most often floating.

If all these elements work correctly, you should diagnose the spark plugs and check the condition of the air filter. By the way, sometimes the cause of the floating speed is not the sensor itself, but its electrical wiring.

Why are the turns on VAZ-2114 floating? Diagnostics of PXX

First of all, we check the PXX sensor. On domestic cars it is mounted on the throttle body near the throttle position sensor on the two mounting screws. To check its efficiency, we need to prepare a multimeter. First turn off the ignition, then disconnect the connector with the wire from the sensor and with the help of our device we measure the resistance level between the contacts of the regulator. Under normal conditions, this value is 40-80 ohms. If the readings you received do not correspond to the norm, most likely the regulator has come into a malfunction. In this case, it must be replaced.

DFID

Next in the queue for testing is a mass air flow sensor. It is he who is the frequent reason why swings turn on the go. To test it, we will also use a multimeter. Here we measure the voltage between two contacts - the connectors of the DMRV, to which the green and yellow wires are suitable. When performing diagnostics, the engine must be switched off and the ignition switched on. The multimeter should show a value from 0.999 to 1.02 V. If the readings do not justify the norm, this indicates a fault in the DMRV.

EGR Valve

This device is an exhaust gas recirculation sensor . The EGR valve sends a portion of these gases to the combustion chamber of the engine, thereby increasing the likelihood of complete combustion of the fuel and, as a consequence, reducing the emission of toxic substances out to the atmosphere. By its design this detail is very simple, but very often with it there are problems. If you do not periodically clean the valve seat and its seat, you can soon expect an unstable motor. This is the main reason why the engine speed is floating on the VAZ-2114. If you have not cleaned this element for a long time, carefully clean the contaminated area with an aerosol to clean the carburettors. Do not allow the material to get on the diaphragm of the valve.

Why do the idle speed float on the carburetor engines?

VAZ-2114 "Samara" with a carburetor engine is also not immune from such a problem. It happens, fortunately, not every day, but still. The main reason for this is incorrectly adjusted or defective carburetor itself. Also, the floating speed can be caused by the air suction or a faulty solenoid valve XX. In addition, it is worth checking the air filter for deposits in it.

But more often floating turns arise precisely because of wrong adjustment of the carburettor. In this case, you should adjust it by properly rotating the screws of quality and quantity of fuel.

As for the solenoid valve, it can be diagnosed without removing the power cord from it. It is enough with the ignition on, to touch the contact cord on the valve - a characteristic click will soon appear. If it is not, you can try touching the contact with a wire that is connected to the positive terminal on the battery. If, and after that, you did not hear a click, then most likely the valve came to malfunction. To repair it, it is necessary to unscrew it and clean the jet.

So, we found out why the speed on the VAZ-2114 is floating and how to fix this problem, depending on the type of malfunctions.