If a car with an automatic transmission stalls, it means the engine stops turning the gearbox shaft. The oil pump, which creates pressure in the unit, is turned off. The box automatically switches to neutral mode. Causes:
- low quality fuel is filled;
- the mass air flow regulator has failed;
- breakdown of the crankshaft position sensor;
- The vacuum brake booster does not work;
- The throttle valve is clogged.
Look at the fuel level sensor in the tank, in case you simply forgot to refuel in the bustle.
When reverse gear is activated
Check the oil level - it may be too high. Inspect the gearbox switch set for reverse speed. It may fail.
I started moving in reverse and the car stalled.
Due to increased pressure, the torque converter may become blocked. The reason is increased oil supply. Start downhill in the neutral position, and then switch to reverse. You will feel whether the torque converter is blocked or not.
Automatic transmission stalls when put into drive
First change the oil in the box. Sometimes the dirt present is the main reason. Or there is a problem with the wear of the solenoids. This requires automatic transmission repair. The second reason is an electronic malfunction that requires diagnostics. Elimination is carried out based on the information received.
Cold car turns off when automatic transmission is turned on
Oil viscosity can only have an effect in very severe frosts. Modern cars take this factor into account. The reason may lie in the speed sensor reading incorrect readings. When the temperature rises, contact is restored and the element begins to perform work correctly.
If no problems are found in the electrical part, look at the mechanics. The box may need to be disassembled.
Most common reason
It is worth paying attention to the fact that all reasons can be divided into several categories. Why does the car stall while driving? The reason can be both trivial and complex. If we are talking about injection engines, then very often the regulator that is responsible for the idle speed fails. It is he who supplies the required amount of air to the fuel rail. The idle air control is a stepper electric motor, which opens and closes the channel through which clean air passes into the mixture formation ramp. So, first of all, you need to make sure that the idle air control is working properly. To do this, you need to crank the crankshaft with the starter while simultaneously depressing the gas pedal. The engine starts, but the number of revolutions constantly changes. There is an obvious failure of the IAC - the engine stalls when you press the gas. And the most effective way to get rid of such a problem is to completely replace the element. You will need to install a new idle air control valve. On VAZ cars this is done literally in a matter of minutes.
The engine stalled while driving in a car with automatic transmission
If a car with an automatic starts and then turns off while driving, possible reasons:
- clogged spark plugs;
- interruptions in fuel supply;
- power supply failure;
- low or high oil level in the automatic transmission.
When turning on the speed
Often observed when driving slowly. During switching, the revs drop and the engine simply does not have time to catch them. The cause of constant failures may lie in failed solenoids.
Throttle problems
Quite often, the reason that the engine starts to stall is the throttle valve itself. It is quite possible that the air filter has worn out, so the entire surface of the damper inside is dirty. To fix this breakdown, it is enough to clean the damper completely from the inside. Please note that after thorough cleaning the problem may persist; the engine still stalls when you press the gas. In this case, you need to make sure that the position sensor is in good condition. This sensor is a variable resistor. It is installed on the damper axis. Moreover, maximum wear is observed in the extreme position (corresponding to idle speed). If it fails, it must be completely replaced. The cost of the part is quite low, and replacement occurs literally in a matter of minutes. But it is possible that the engine begins to stall, despite the fact that all sensors are in perfect condition.
What should you do to avoid killing the machine gun in your car?
Driving a car with an automatic transmission is easier, unlike driving a car with a manual transmission, where everything is much more complicated. Fortunately, most modern cars are equipped with an automatic transmission, and every year more and more people are purchasing cars with automatic transmission. But did you know that you need to use an automatic transmission, following certain rules, so as not to kill the box?
Yes, yes, it is much easier to kill her than the “mechanic”. If this happens, you will be shocked at the cost of repairing it. This, of course, is the main disadvantage of the “automatic”. We have already written more than once about what to do to increase the service life of an automatic transmission in a car. It's time to update our list. So, let's go. Here are 8 things you should follow to avoid breaking the automatic transmission in your car.
Fuel pump
If the fuel pump does not work, then, of course, the car stalls. The carburetor will work perfectly, but no one gives it gas. On fuel-injected cars, the fuel pump is located under the rear seat. On carburetor engines - near the camshaft (since it is driven by it). If it stops working, the engine may idle normally, but when the speed increases, it will definitely stall. However, if the gasoline pump is completely worn out, the engine will not start at all. To get rid of this malfunction, it is necessary to either repair the pump or replace it completely, which is the most effective. As for carburetor engines, the pump diaphragm drive rod can wear out greatly.
Video “Features of operating an automatic transmission”
Everything about operating a car with an automatic transmission is on video (author: Vladimir Grechaninov).
In general, what I expected from day to day arrived - it stalled automatically
