What does it mean to coast a car in neutral?

[RyleeDella]

Coasting a car in neutral refers to the operation method where, while the vehicle is in motion, the driver shifts the gear lever to the neutral position, disengaging the clutch between the engine and the drive wheels, allowing the vehicle to move by inertia. Coasting in neutral can easily cause the vehicle to stall, which is detrimental to the car's engine. Coasting in neutral should only be done when safety and the vehicle's technical condition are ensured to be normal, especially avoiding stalling or coasting in neutral when going down steep or long slopes. After shifting to neutral and disengaging from the drivetrain, the engine only maintains a fixed idle fuel consumption without disengaging completely, and may require additional throttle input; otherwise, insufficient coordination between speed and gear may cause the car to shake and stall. Modern vehicles are equipped with electronic fuel injection systems, where the amount of fuel injection is controlled by a computer based on sensors within the engine, making the idle speed of fuel-injected cars non-adjustable.