Why are the revolutions falling?
Many motorists are asking themselves,why the idle turns are falling. A drop in engine speed can occur for various reasons. For sure, every motorist noticed such behavior of the engine, for example, when standing at a traffic light.
In this article, we will consider the frequent causes of the drop in engine speed.
Why the engine speed is dropping
Poor-quality fuel
Very often the cause of falling or sailing of turnsengine is covered in bad fuel. If you refuel at different gas stations, then you noticed a difference in the quality of fuel. Everyone knows that in the countries of the former USSR, owners of petrol stations like to taunt gasoline. Because of this, the engine of your car suffers. And if the gasoline is of poor quality, then there may be problems with the fuel system. Try to refuel the car at another gas station and compare: if there is no difference, then continue reading the article further.
Fault in the fuel supply system
Because of poor-quality fuel, some elementsThe fuel system may stop functioning normally. Try changing the fuel filters, this can help. If this does not help, then you will have to do an audit of the fuel system.
The problem can still be in an uneven supplyfuel on the cylinders. In this case, you should go to a maintenance station where the specialist will fix the problem. Do not try to do it yourself: by your actions you can disable the injector.
It is worth checking the pressure in the fuel rail: connect the manometer, record the results and compare them with the permissible results that should be in the manual of your car.
The problem can also be in the fuel pump. He can pump fuel unevenly, and because of this, engine speed may drop.
Malfunction in gas distribution mechanism
Over time, the gas distributionmechanism may be violated. You have to re-position the gas distribution mechanism by the marks. It can go as far as cleaning the valves and the intake manifold from the deposit. If the engine has not been repaired for a long time, a deposit in the reservoir can form quite a lot.
Malfunction in the air supply system
The problem with the air flow sensor can also bebe the cause of the drop in speed. In order to check it, connect the positive terminal of the tester to the yellow wire that goes to the sensor, the negative terminal of the tester, the negative - to the battery. The voltage should be between 0.98 and 1.02 volts.
The fault can also be latched in the sensoroxygen or in the engine temperature sensor, which calculates the number of revolutions when the engine warms up. Also the problem can be different compression in the engine cylinders. Due to uneven compression, the engine starts to work unevenly.
We examined the main reasons whythe engine speed may drop. Perhaps you will be interested in another article from our site on a similar topic - Why the car stalls at idle.
