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.

A ticking noise from your car can be caused by a number of things. If it occurs when the engine is running but the car is not moving, it’s probably coming from the engine or something associated with ...

There are many reasons a car makes strange, unusual noises only when it's cold. These sounds could be a warning something is ...