If your car is shaking while it is idling, it is most likely your automatic choke. The automatic choke is not operating correctly but if you remove the choke and put a lubricant on it, it should stop shaking.
could need a good tune up sounds like it has a miss
I sat in my car in the driveway with the car idling, waiting for the kids to come out.
The same on a car equipped with manual transmission. On an automatic equipped car it will use less idling.
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 depends on how long you are idling, or how fast you are going. If you know you are going to be idling for a long time, it's best just to put your car in park.
If a car shakes and loses power when idling it can be the spark plug. If a spark plug is fouling, it can cause power losses.
moving
by the idling air control valve
A car that is stopped with the engine running.
your car will have a hard time idling and have a power loss when trying to pick up speed or going up an incline
If the car dies while idling, the timing might be off. Other causes can include a clogged fuel filter or a bad spark plug.