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, ...

Some 2010-13 XK models with 5.0-liter supercharged engines may produce a pinging noise under moderate acceleration or load. According to Jaguar, the detonation typically occurs in the 1,200 rpm to ...