Engine knock is not a single problem — there are at least four distinct types, each with a different cause and a different level of urgency. The pinging sound that appears only under hard acceleration ...

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, ...

Hello Paul, my car has started making a loud knocking noise from the engine, especially when accelerating uphill. It was not there before. I worry it could damage the engine if I continue driving.