Unstable Idle After Starting the Car Followed by Automatic Engine Shutdown After a Few Seconds?

[ElisaMarie]

The reasons for unstable idle after starting the car followed by automatic engine shutdown after a few seconds include the following: Engine shutdown caused by excessive carbon deposits: Carbon deposits typically accumulate in areas such as the throttle valve, spark plugs, cylinders, fuel lines, and intake passages. These are a coking-like substance formed when fuel is exposed to high temperatures. General physical methods are ineffective in removing them, and specialized carbon cleaners are required for cleaning. Poor fuel quality and clogged fuel injectors: Using low-quality fuel not only leads to increased carbon deposits but can also clog fuel injectors, resulting in poor atomization. Additionally, low-quality fuel directly affects combustion efficiency, increasing fuel consumption. The carbon monoxide produced from incomplete combustion can accumulate inside the vehicle and may even lead to fatal poisoning.