Q My 2002 Chevy Tahoe, with the 5.3-liter V8 engine and 93,000 miles on it, makes a rapping noise just after a cold start. After a few seconds, it disappears, and the engine is the quietest-running ...

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 I have a 2006 Honda Accord four-cylinder with 105,000 miles. It has developed a clicking engine noise on a cold start. After the car has warmed up, the sound goes away. I have seen references to a ...