What should I do if 230JK is weak in acceleration?

1) Check the intake pipe for air leakage. 2) Check whether the ignition time is too late. 3) Call up the fault code and analyze the cause of the fault. 4) Check the fuel injection system, such as the fuel pressure and the working condition of the fuel injector. 5) Check whether the ignition system, especially the knock sensor and igniter work normally. 6) Check whether the throttle position sensor is normal. 7) Check the working conditions of EFI circuit and components related to fuel injection. 8) Check cylinder pressure, valve clearance, spark plug working condition and valve timing.