Causes of unstable idle speed of automobile air conditioner

It is believed that there are many small-displacement car owners who turn on the air conditioner on a hot day, but the idle speed of the car is unstable after turning on the air conditioner. What's going on here? Next, let's look at the reasons for the unstable idle speed of the car.

If your car is a small-displacement car, it is common to turn on the air conditioner and idle at an unstable speed. You should know that the compressor will also work after the air conditioner is started, and the compressor is driven by the engine, so the work of the compressor will increase the burden on the engine.

For most electronic throttles, the engine will automatically increase the throttle opening to obtain more intake air, thus increasing the output power. If your car has been used for a long time and is not maintained for a long time, the throttle will produce carbon deposit, which will hinder the intake of the engine, lead to insufficient engine power or barely drive the compressor, and lead to unstable idling of the air conditioner.

Throttle carbon deposition can be solved by cleaning, and the price will not be very expensive. If your car is in a bad environment, Bian Xiao suggests that you clean it every 65,438+00,000 kilometers.

If your car is a new car, it is unlikely that the throttle will accumulate carbon so early, then it cannot be ruled out that other components have failed, such as the intake sensor and the fuel injector, which led the engine control unit to mistake it for instantaneous high load, and then it tried to increase the speed to offset the resistance at idle. When the engine speed drops, it can't bear the load of the air conditioner compressor, and it will increase the speed again. This kind of tossing and turning is manifested as unstable idle speed.