How to solve the engine knock phenomenon?
1. Reduce the ignition advance angle;
2. Use gasoline that matches the grade (octane number);
3. Eliminate carbon deposits in the combustion chamber;
4. If knocking occurs on the uphill slope of the car, it should be replaced in the low speed gear in time;
5. When the car starts, don't switch to the direct file too early.
6. When the engine load is too large and knocking occurs, closing the small throttle valve can also reduce the knocking effect.