What is the reason that visual X3 indicates that the vehicle lacks power?

It's best to read the fault code with the computer first to see if there is any fault code. If there is no fault code, the general treatment step is to clean the throttle first, and then check the spark plug. Change it if necessary, and pay attention to the quality of gasoline and whether it is added at a big gas station. Run after this treatment, if it is still not good, it is necessary to clean up the carbon deposit. Of course, the cleaning of inlet, nozzle, ternary and combustion chamber has its own advantages and disadvantages. It is recommended that vehicles over 10 be disassembled and cleaned, and newer vehicles be disassembled and cleaned. If it is not, it is necessary to detect the driving data flow and record it with OBD box to see if the deviation between the oxygen sensor and the fuel correction value is too large during the acceleration jitter, and then analyze whether there is any fault such as the oxygen sensor of the air flow meter.