I want to ask, how to adjust the ignition advance angle of the car? I measured it with the car guard.

First of all, the range of 5 to 15 given by the software is only a reference and cannot be used as a standard value. If you want to know whether the ignition advance angle of your car is normal, you can't simply detect the ignition advance angle, but you also need other data as a reference, such as vehicle speed, water temperature, throttle opening, load, intake air volume, intake air temperature and so on. The control of ignition advance angle is a complex process, and the control points are different under different working conditions, so it is relatively stable at idle speed. Torque and emission under medium and small load, torque under heavy load, etc. It can be subdivided into many working conditions, so as a car owner, don't study this. Hobbies can only amuse themselves. We repairmen are most afraid of that kind of incomprehension. He thinks he understands. In fact, he hasn't started yet. When you think repairing a car is easy, it just shows that you know too little. In fact, most people in this line of work will feel that the more they work, the more they feel that they don't know anything. Humans have gone from ignorance to ignorance.