actually needed more info so im gonna assume its turbo if not then its this one below
A car that is stopped with the engine running.
water in the fuel can cause an idling motor to sputter and/or die.
yes
check the engine mounts
an idling diesel engine or snoring :]
Yes, "sparkling plugs" is definitely detrimental to idling or smooth running of an engine
Engine idling in park
The fan clutch is not functioning properly. Replace.
NO not that engine.
Engine idling in park.
Idling is what your car is doing when it is just sitting somewhere running. As soon as you press on the gas it is no longer idling. Your idle speed is the number of RPMs your engine runs at when you are idling.
It is idling. This is hard for an engine to do smoothly.