A problem in the fuel line could cause it to stall.
On a stick shift, letting off the clutch too soon would cause the vehicle to stall.
It depends on the gearing of the car. If you are in the highest gear and 40mph in that gear is under the idle rpm of that car than you will stall.
Check your transmission fluid level and also if the gear chamber is not well greased then it will make them stick causing the vehicle to stall.
Travelling to slow in a high gear, so clutch in and lower the gear.
If the car is starving for fuel or air (low power at idle), the car will stall while turning.
check the idle speed with the car in gear, if it has a tac on the dash it should idle in gear at about 700 rpm if its too low the car will vibrate or stall.
Because the driver took their foot off of the gas and slowed down in a high gear. Or probably because they didnt push in the clutch. Either of those things can stall a manual transmission.
The question is vague but I know a Mass Airflow Sensor issue causes the car to stall out when the gas pedal is applied like it has no power when in gear. The car may idle okay, I've even seen my friend pump the gas while it's in gear and gets the car moving but while the pedal is held down and the clutch is out the car will die.
The clutch is master and or slave cylinder are bad
Does your car have overdrive? Does it stall when going uphill? If you answered yes to these it is possible that your transmission kick down isn't working.The kickdown basically detects when the car becomes under load and shifts the transmission down a gear.
yes, if you are doing too few revs for the gear you are in then you will stall.
It can if it sticks open at idle.
sensor or belt