Daewoo Lanos rpm is very high why is that?

High RPM in a Daewoo Lanos can be caused by several factors, including improper idle adjustment, a malfunctioning throttle position sensor, or issues with the fuel system, such as a clogged fuel filter. Additionally, a vacuum leak or faulty ignition components can lead to an increase in engine speed. It's essential to diagnose the specific cause to ensure optimal engine performance and prevent potential damage. Regular maintenance can help mitigate such issues.