Is it related to the launch of the vehicle and the spark plug?

Yes. When we find that the difficulty of starting the vehicle is difficult to start, we must consider whether there is a problem with the spark plug. Generally speaking, the engine needs several times to start the ignition to start successfully, and the spark plugs have reached the use period of use. In addition, after the aging of spark plugs causes this situation, it is also found that the vehicle is easy to turn off when the vehicle is idling, which can be judged in combination with these two situations.