What happens if the car is left idling for a long time?

1 Answers
ClaraDella
07/29/25 5:38pm
Leaving the car idling for a long time can lead to carbon buildup inside the engine. When the engine is idling while parked, the combustion process is actually incomplete, resulting in the formation of significant carbon deposits inside the engine. If the engine remains in an idling state for an extended period, sludge can also accumulate inside the engine. If carbon deposits form on the piston tops, it can increase the engine's compression ratio, leading to engine knocking. Knocking can cause increased fuel consumption and reduced power output, and it is also harmful to the engine itself. Severe knocking can even result in connecting rod deformation or piston cracking.
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