After changing the battery, the car is idling unsteadily and can't speed up?

Let the car run a little, and it will generally be fine. Or clean the throttle, if not, you need to use a special computer to adjust and match the throttle bypass valve screw.

Once the battery head is cut off, the power supply inside the automobile ECU computer will be cut off, resulting in the loss of the internal memory of the computer. Therefore, when the power supply is reconnected, the memory between the computer and the sensor needs to be relearned to recover or match.

Although CU computer has the function of memory recovery, it needs to be restored in a specific state, and such a program is very complicated. It is best to carry out a learning program of throttle position sensor to restore the memory lost by computer due to power failure, so as to adapt it to the present situation of automobile and improve the overall performance.

Precautions for using car batteries are as follows:

After the battery is used for a period of time, a large amount of sulfide will naturally accumulate on the electrode plate, which will affect the normal work of the battery (the battery light is on) and need to be taken out in time to solve it. The battery is charged at a high current of 5h+ current. When the liquid temperature does not exceed 40 degrees, 30% will be discharged.

Therefore, the slight sulfide salt on the surface of the plate is washed away, thus being desorbed, dissolved and converted into active substances. Insufficient voltage performance: first, remote control doors, instruments, radios, etc. ; Small current electrical equipment can be used normally; The starting motor does not work, and the motor is cracked.