What is the reason for the low idle speed? What is the reason for high idle speed?

What is the reason for high idle speed? This situation may be caused by low engine temperature and damage to the throttle idle control valve. After this happens, read the fault code and check the throttle. Throttle is an important part of automobile engine, which is used to control the amount of air entering the engine.

The throttle valve is installed on the intake pipe of the automobile engine.

After the driver steps on the accelerator pedal, the throttle opening will increase, and the air entering the engine will increase.

When ecu detects the increase of air entering the engine, it will control the fuel supply system to increase the fuel injection quantity, thus increasing the engine speed.

When the engine is idling, the throttle valve will keep a small opening. If the throttle valve is opened too much when idling, the engine will be idling too high.

If the throttle is broken, just replace it with a new one.

If the idle speed increases because the engine temperature is too low, the idle speed will return to the normal level after the engine reaches the normal temperature.

When the engine was first started, the temperature was relatively low. At this time, increasing the idle speed can make the engine warm up quickly.

All engines have a normal operating temperature range, and only in this temperature range can the efficiency of the engine be the highest and the fuel consumption be the lowest.

What is the reason for high idle speed?

1, throttle failure. Too dirty throttle will lead to throttle opening error, throttle sensitivity will be reduced, and it may not be closed well at idle speed, resulting in abnormal idle speed. In addition, the throttle failure will also affect the engine's power, acceleration performance and fuel consumption, and even lead to difficulties in starting in serious cases.

2. Idle speed control valve is faulty. The failure of idle valve will make the idle speed unable to be adjusted correctly, which will cause problems such as unstable idle speed and difficult cold start. In severe cases, there will even be no idle speed, and the engine will stall as soon as the throttle is released.

3. Sensor failure. Sensor failure, computer error, or computer failure, engine idling is abnormal.

The idle speed of this car is too high and it consumes a lot of fuel. It doesn't really matter much when it starts, because it can be controlled by the throttle. The simple thing is that when you practice changing positions, you don't need the throttle, and you can start directly by releasing the clutch. At this time, the idle car is fast and the idle car is slow. So if it is too small, it is easy for people who have just learned to drive to stall. (Photo/Text/Photo: Ask and Answer Animals) @20 19