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water in the fuel can cause an idling motor to sputter and/or die.
Could be in need of a tune up.
because itt needs to be work on
Possibly. The main thing it can cause is severe engine wear. Too much oil is just as bad as too little.
If the check engine light comes on it is best to take it to a auto part store or mechanic for a diagnosis. They will be able to inform the owner what the issues is.
A malfunctioning battery can't provide enough power to your ignition system when the motor is idling can cause sputtering. If there is not enough gas, that can cause your vehicle to sputter. If the spark plugs fail to fire will also cause your vehicle to sputter.
something is loose
It could be many things. Try spraying brake cleaner on the back side of the engine where the intake manifold meets the cylinder head. If the gasket is bad the engine will mis fire or stumble.
A car that is stopped with the engine running.
Check engine light on, low tire pressure, aggressive driving, excessive idling, dirty air filter, brakes dragging,
yes
It may be a EGR valve issue. This valve is normally closed at idle and opens at about 40mph.