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.
What would cause my VW golf to cut out whist driving
why does it matter if you're driving down a hill? At least it didn't cut off when you were driving up a hill? And I don't know why it would cut off I'm 13.
If you mean 'cut off' as in the car dies while driving its probably your alternator.
sounds like your alternator..
No spark .no fuel.
main fuel relay going bad. Eventually car will cut off while driving.
One reason a 1998 Cadillac Deville would cut off while driving could be the fuel pump or the car is out of fuel. Another reason could be the spark plugs.
It can lead to an accident
From all of my experience with cars if a car turns off while in motion it tends to be the alternator.
Check your IAC (Idle Air Control) valve. They go bad on Mazdas around this year, and cause sporadic dying. It can be fine for weeks, or months, then just stall out.
Several things can cause your car to cut off while driving. Run a computer check for possible bad codes to see what may show up as a cause.
WELL U HAVE AN ELECTRICAL PROBLEM U SHOULD GET LOOKED OUT ASAP BEFORE U HAVE A FIRE.