Why can't the car climb up during hill start?

[SabrinaAnn]

Reasons: Not applying throttle - After the car starts moving on the slope, you need to apply some throttle appropriately, otherwise the car will lack power to climb or even stop; Releasing clutch too quickly - During the hill start test in Subject 2 of the driving test, you should slowly release the clutch until the car vibrates, then release the brake and apply throttle smoothly. Not applying throttle: When the vehicle is climbing a slope, if you don't apply throttle, it's likely that the idle speed won't be sufficient to move the vehicle, causing it to stall. Once the car starts rolling backward, it's almost impossible to avoid stalling. When rolling backward occurs, you must first press the brake and clutch to stop the car completely, then restart. Releasing clutch too quickly: When driving, you should completely release the handbrake and apply throttle gradually. Don't lift the clutch too high - lifting it too high without releasing the handbrake will also cause the engine to stall.