What are the effects of prolonged idling on a car engine?

[LaCaroline]

Prolonged idling has adverse effects on the engine, as incomplete combustion occurs during idle operation, leading to increased carbon deposits inside the engine. Specific details are as follows: 1. Cars frequently driven in urban areas often experience extended idle operation. When driving in city traffic, vehicles frequently stop at red lights and encounter traffic congestion, which is particularly harmful to the engine. Carbon deposits pose significant risks to engine performance. 2. If carbon deposits accumulate in the intake tract, they can disrupt the engine's air intake, resulting in an incorrect air-fuel ratio. When carbon deposits form in the combustion chamber, they increase the compression ratio, thereby raising the likelihood of engine knocking. Frequent knocking reduces engine power, increases fuel consumption, and can cause engine damage. Therefore, prolonged idling should be avoided during regular vehicle use.