Just changed the cylinder liner and piston, and the piston ring still burns oil. Why?

After replacing the cylinder liner, piston and piston ring, the engine oil still burns, because there is too much carbon deposit on the throttle of the vehicle engine, so it is necessary to clean the throttle of the engine. This problem can be eliminated after cleaning the throttle. The specific operation steps for cleaning the throttle valve are as follows:

1. Remove the filter as a whole.

2. The whole throttle inlet is exposed and ready for cleaning.

3. Insert the wrench into the throttle and push it away.

4. Spray the accelerator cleaner into the accelerator and spray it several times.

5. Replace the filter to complete the operation.