Why does the car fail to start when hot but starts fine when cold?

[TravisRose]

Car failing to start when hot but starting fine when cold is usually caused by excessive engine carbon deposits. It is recommended that the driver check whether the car's spark plugs need replacement and whether the throttle needs cleaning. The throttle is a controllable valve that regulates air intake into the engine. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture, which then burns to perform work. The throttle is connected to the air filter at the top and the engine block at the bottom, and is often referred to as the throat of the car engine. The spark plug is a crucial component of the gasoline engine's ignition system. It introduces high-voltage electricity into the combustion chamber and creates a spark by jumping the electrode gap, thereby igniting the combustible mixture in the cylinder.