What is the problem that causes the speed not to go up when Lang Lang speeds up?

1, it is very likely that tire dynamic balance needs to be done, and the fault will disappear after it is completed.

2. If the engine shakes, there are many reasons, most of which are caused by the fuel quality, especially the model with T, which has higher requirements for fuel. If you add 93# oil for a long time, it is suggested to try two cases of 97# oil or add some fuel additives to see if it can be alleviated.

3. Insufficient air intake, poor ignition and other reasons, such as dirty throttle, long-term non-replacement of air filter and non-ignition of spark plug, will cause engine jitter. It is recommended to go to the maintenance station for further inspection.

4, sometimes in addition to mechanical failure, ECU (engine computer) parameter setting error can also lead to failure, so it is best to do computer testing to see if there are any parameters that need to be adjusted and whether ECU needs to be upgraded.