Is that knocking sound your engine is making just a case of low-octane fuel, or is it something more serious? The answer is crucial for your engine's health.

The first thing you need to do, if you hear noise coming from your engine, is to determine what type of sound it is. If the sound you hear is a knocking noise, that should be an easy fix.

How Do You Fix Engine Knocking? If incomplete combustion timing is causing your engine knocking, the solution can be as simple as switching to higher-octane gasoline.