2. Maintain the proper oil level. Check the oil level regularly and add oil as needed.
3. Avoid low-quality fuel. Knock can be caused when there are small, solid parts and water droplets in the fuel. If you think you may have put bad gas in your car, the only solution is to drain the tank and fill up with fresh fuel.
4. Cool the engine properly. Make sure the cooling system is working properly and the radiator is full.
5. Use a high-octane fuel. Higher-octane fuels have higher ignition temperatures and tend to cause less knocking.
6. Check for vacuum leaks. Vacuum leaks can cause the engine to run lean, which can lead to knocking.
7. Check the spark timing. Incorrect spark timing can cause knocking.
8. Check for carbon deposits. Carbon deposits on the pistons, cylinder heads, and valves can cause knocking.
9. Check for a loose or damaged oxygen sensor. A loose or damaged oxygen sensor can cause the engine to run rich, which can lead to knocking.
10. Consider adding a fuel injector cleaner. Fuel injector cleaners can help to clean the injectors and remove any deposits that may be causing knocking.
11. If knocking persists, it is best to take the car to a qualified mechanic for further diagnosis.
