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, ...

Q: My 2009 Volkswagen Jetta Sportwagen – with a five-speed manual transmission – makes a weird tapping noise. The noise has been there forever, yet the car runs great. I have had the engine looked at.

Don't ignore what your car is trying to tell you. Here are four critical indicators that your card engine is on the verge of ...

Engine knock is the sharp, metallic sound that cuts through the hum of a healthy engine. At its core, engine knock is a problem of timing. In a knocking engine, parts of the air-fuel mixture don't ...