Just shake the engine and refuel. What's going on here?

Just shake the engine and refuel. What's going on here?

After using the car for a long time, there will be various minor problems, sometimes inexplicable fault codes, sometimes abnormal sounds and so on. But what I'm going to tell you today is quite special, that is, the car will shake when it is parked in the same place, as long as you add a little throttle. Many people have encountered this situation, but it is not clear what caused it. Whether it is used or repaired. I really stopped shaking after I went to the 4S shop, but I was cheated for hundreds of dollars in vain.

The engine will inevitably shake when burning gasoline, which is quite regular under normal circumstances. If it's the jitter when the car is parked in the same place, just refuel a little, then most of it is caused by insufficient idle output power of the engine. There are four reasons for this problem. Let's talk about it one by one.

The first one is the throttle carbon deposit.

The most direct problem after carbon deposition in the throttle is the engine idling jitter, and this jitter is irregular, even sometimes shaking and sometimes not shaking. When there is a lot of carbon deposition in the throttle, the opening of the throttle will be affected when refueling. Generally speaking, when the throttle is not turned on and off smoothly, it will cause the engine to burn badly and produce jitter. It usually costs tens of dollars to go to a repair shop.

The second reason is the serious carbon deposition inside the engine.

After serious carbon deposition in the engine, some gasoline entering the cylinder will be adsorbed by carbon deposition, resulting in insufficient output power during combustion and engine jitter. However, this situation will generally be alleviated by adding conventional oil and running at high speed.

The third reason is the lack of cylinders.

The more intense the engine works, the smaller the jitter will be, so the jitter will be more obvious when idling than when refueling. However, the lack of cylinder will also cause obvious idle jitter, but the probability of this problem is still relatively low. It has been in operation for 10 years, and only one engine jitter caused by lack of cylinder has been encountered, which is very obvious. At that time, the car was bitten off by a mouse, resulting in a lack of cylinders. So when you check the vehicle, try to check whether there is a bitten wireless road.

The fourth reason is the aging of the machine pad.

This kind of situation is generally more common in old cars. Family cars with relatively new car age generally do not have these problems. Machine pad is a kind of rubber product, which will age with the increase of automobile service life. If your car has a long life, you need to pay attention to whether this problem causes jitter. What I want to tell you is a special situation, that is, when the car is parked in the same place, you will be fine with a little throttle. Many people have encountered this situation, but it is not clear what caused it. Whether it is used or repaired. I really stopped shaking after I went to the 4S shop, but I was cheated for hundreds of dollars in vain.