What is Engine knocking?
'''Engine knocking''' is the sound produced in an [[internal combustion engine]] when the fuel does not [[Burn|ignite]] properly. The mixture of petrol and air is meant to be ignited only by the [[spark plug]] at the right moment in the stroke of the [[piston]] in the engine. If there is a problem with the engine, this fuel and air mixture can be ignited at the wrong time by [[pressure]] and heat. The explosion of the mixture makes a destructive knocking sound. This uncontrolled explosion can damage the engine and may even destroy it. [[Category:Motors]] [[Category:Engineering]]