That rhythmic knock under the hood could mean five very different things.

Engine knocking, or detonation, occurs when fuel in the cylinders ignites unevenly, causing metallic pinging sounds, reduced power, and potential engine damage. Key causes include low-octane fuel, ...

We may receive a commission on purchases made from links. Car engines derive power from thousands of miniature explosions contained within their cylinders every minute. We quickly become accustomed to ...