Deceleration throttle valve

After cleaning the throttle, it is easy to have unstable idle speed and increased fuel consumption, which is generally caused by the throttle opening not being reset. Because the throttle is squeezed by carbon deposit, the opening of the throttle will expand. After cleaning, if it is not reset, the throttle opening will remain in the state before carbon deposition, and the air intake will increase, which will lead to unstable idle speed, too high speed and increased engine fuel consumption.

How to break the idle speed of cleaning throttle?

At present, most cars use electronic throttle, and the driving computer monitors the intake of throttle to control fuel injection. When the throttle valve is found to be cleaned, it detects an increase in intake air, and it will reduce fuel injection according to the situation. If the idle speed is high, just connect the engine with the diagnostic instrument and initialize the throttle to restore the normal idle speed. Some models still use mechanical cable throttle, and the throttle opening can be gradually restored to the initial state during driving. Generally, after running around 10 km, the idle speed will tend to be stable.

Under normal circumstances, the throttle valve is cleaned once after driving for about 20,000-30,000 kilometers. It can be cleaned with a special foam cleaner or by removing the throttle valve. The 4S shops or repair shops usually use the method of "hanging bottles" for cleaning-it takes a long time to continuously spray cleaning liquid to the air inlet when the engine is running, but the operation is relatively simple, and the air inlet can be cleaned by the way.

It should be noted that the throttle should not be cleaned frequently, because the surface of the throttle has a dust-proof and antistatic coating. If the cleaning is too frequent or the cleaning solution is not used properly, the coating will be worn and the throttle will be dirtier later.