How to debug Huanglong 600 four-cylinder balance

The throttles of 1 cylinder and cylinder 2 are connected on the same shaft and cannot be adjusted independently; The same is true for cylinders 3 and 4; So we can only use this screw to roughly adjust 1, cylinder 2 and cylinder 3 and 4 together.

On each accelerator, there is a small screw in the direction and center of the front. This screw is an air screw, which is used to adjust the bypass intake of each cylinder independently, and can fine-tune the intake flow of each cylinder. When collecting data with PCHUD, you must wait until the heating of the oxygen sensor is completed, that is, the car is heated for more than 30 seconds, or the degree of the oxygen sensor can be very small when collecting data.