Step on the accelerator after the car starts.

It is very likely that the tachometer or speed sensor is faulty, or the fuse of the speed circuit of the automobile instrument is faulty, and the specific reasons need to be analyzed in detail.

In fact, there are many reasons why cars don't step on the accelerator:

1. air intake system problem: the air filter in the third filter needs to be cleaned or replaced frequently. If the air filter is blocked or the throttle system is blocked, the air intake will be reduced, the combustion will be insufficient, and the power will be reduced, so it is not unreasonable not to step on the throttle.

2. Oil circuit problem: After the car is driven for a long time, there will always be carbon deposit in the nozzle, which will lead to the blockage of the nozzle, which may lead to oil leakage in the fuel pipe and the blockage of the gasoline filter. Oil intake will naturally decrease, atomization is insufficient, and combustion efficiency will naturally decrease. At this time, the car is getting weaker and weaker when driving.

3. There is something wrong with the ignition system: there is still black smoke when stepping on oil, which is probably a problem with the ignition system. Carbon deposit appears in the spark plug of the ignition system. Poor ignition will lead to decreased power and high fuel consumption. For car owners, in order to make their cars run better, it is very important to replace the spark plugs regularly.