How do you fix pre-ignition?

To fix pre-ignition, first ensure that the engine is properly tuned, including the correct air-fuel mixture and ignition timing. Check for issues such as carbon buildup, which can create hot spots, and clean or replace spark plugs if they are worn or too hot. Additionally, use high-octane fuel if necessary, as it can help prevent premature ignition. If pre-ignition persists, consider inspecting the engine for mechanical problems, such as excessive compression or overheating.