Why is my Nissan KA2400 misfiring at idle?

A misfire at idle in your Nissan KA2400 could be caused by several factors, including faulty spark plugs, worn ignition coils, or issues with the fuel system, such as clogged injectors or a dirty fuel filter. Additionally, vacuum leaks or problems with the engine's sensors, such as the mass airflow sensor or throttle position sensor, can disrupt the air-fuel mixture, leading to misfiring. It's recommended to conduct a thorough diagnostic check to identify the exact cause.