Detonation (knocking, pinging) Detonation (knocking, pinging) are rapid, uncontrolled combustion of the air-fuel mixture in the cylinder that results in a hard, rattling sound.
Knocking (detonation, pinging) Knocking (detonation, pinging) is rapid, uncontrolled combustion of the air-fuel mixture in the cylinder that results in a hard, rattling sound.