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, ...

QUESTION: I have a 1999 Buick Park Avenue with 47,000 miles. It started to make a tapping noise. It goes away in a few minutes. I went to the Buick service department, and they claim all GM engines do ...

Q: I have a 2006 Mercury Mountaineer with a 4.6-liter V8 that makes a screeching noise along with a tapping noise upon a cold start. I removed the serpentine belt and started the engine, and the same ...