Symptoms of dirty throttle

Generally speaking, the throttle is the throat of an automobile engine. According to the engine load, adjust the air intake and indirectly adjust the fuel injection. After long-term use, there will be carbon deposits and oil stains blocking, which will affect the inaccurate air intake adjustment, and in serious cases, it will affect the idling stability and idling jitter. The cleaning cycle of most accelerators is 20,000 kilometers, not as often as possible. When the throttle valve gets dirty, it will

Symptoms of dirty throttle

Generally speaking, the throttle is the throat of an automobile engine. According to the engine load, adjust the air intake and indirectly adjust the fuel injection. After long-term use, there will be carbon deposits and oil stains blocking, which will affect the inaccurate air intake adjustment, and in serious cases, it will affect the idling stability and idling jitter. The cleaning cycle of most accelerators is 20,000 kilometers, not as often as possible. When the throttle valve is dirty, there will be symptoms such as idle speed acceleration, jitter and vibration, and unstable idle speed (sometimes big and sometimes small). , so it needs cleaning.

Prompt for judging unstable idle speed: 1. Cold start the engine, gradually reduce the speed from 1200 rpm to the lowest idle speed of 750 rpm and keep it stable, during which the pointer cannot swing back and forth. 2. Neutral, step on the accelerator for 3000 revolutions, and then suddenly collect the oil. When the pointer quickly drops to 1000 rpm to 1200 rpm, the pointer will pause a little, then drop to the lowest idle speed and remain stable. If the pointer drops directly below the minimum idle speed soon and then slowly rises to 800 rpm, then I don't congratulate you. The throttle valve has been seriously fouled and needs to be cleaned immediately! Principle: When the engine of EFI vehicle is unloaded, the ECU will automatically stop fuel injection after releasing the throttle; When the speed drops to 1000 ~ 1200 rpm, the fuel injection point will be restored (specifically according to the main parameters set by ECU), and then it will be gradually shortened to idle fuel injection. Form a buffer to prevent flameout (this is the idle flameout prevention program set by ECU).

What's the performance of dirty throttle?

Today, the car editor shared with friends the symptoms of dirty throttle and how often the car throttle is cleaned. So, do friends know the symptoms of dirty throttle, and how often do you clean the throttle of a car? What are the symptoms of dirty throttle and how often to clean the throttle of a car are also the knowledge that users and friends need to know. The following car editor will patiently share with friends the symptoms of dirty throttle and how often the throttle of the car is cleaned, hoping to help friends.

Knowledge sharing: what is throttling?

Throttle is a controllable valve to regulate the air entering the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and then it will be burned to do work. We can describe the throttle as the "throat" of the engine. We step on the accelerator and determine the engine power and cooperation through the throttle opening.

What are the symptoms of dirty throttle? The clearest nature is the power of the engine. When the car is unstable at idle speed, difficult to start, and the power drops, it means that the throttle of the car may need cleaning.

Knowledge: How often do you clean the throttle?

In most cases, 4s stores will encourage small partners to clean the throttle regularly, usually from 20,000 km to 40,000 km. However, it should be noted that checking and cleaning the throttle is not good for it. Excessive cleaning will affect the premature scrapping of the throttle. Frequent cleaning will gradually remove the special coating of the throttle inner cavity, and the inner cavity will lose the coating, which is easy to cause greasy adhesion, thus forming a vicious circle, and the final result is scrapping.

But remind friends that it is not necessary to clean the throttle frequently. You can judge from the feedback of the car power. If the idle speed is unstable, it is difficult to start, and the power is reduced, clean the throttle. If cleaning the throttle still doesn't solve the problem, then the problem is likely to come from other components.

There are two ways to clean the throttle valve, namely disassembly cleaning and disassembly-free cleaning. Most 4s shops take the throttle apart and clean it. Always disassemble the whole throttle, and then fully clean it with special cleaning agent before repairing it. Although this method is more troublesome, it is better than thorough cleaning and expensive. Most 4s stores are 300-500 yuan.

Disassembly-free cleaning is to spray the accelerator cleaning agent directly on the rag to scrub the accelerator. The whole process basically does not need to disassemble the throttle assembly, and the operation is simpler and more convenient than the previous year. Small partners can buy their own cleaning agent and then clean the throttle, but this method is simple, but the cleaning effect is the most, and it is best to use it on the throttle that is not particularly dirty.

Knowledge sharing: what should we pay attention to in reducing expenditure?

One thing to note is that after the throttle is cleaned, the throttle opening needs to be reset, otherwise when there is carbon deposit, the on-board computer has already remembered the opening. If it is not reset, the idle speed of the engine will be unstable and the speed will be too high, even worse than before cleaning. Different vehicle replacement methods are basically different, so I won't share them here. If a friend has concerns, it is best to go to a professional repair shop or a 4s shop for repair. What are the symptoms of dirty throttle @20 19?