Taking your foot off the accelerator.
Probably wheel bearings or wheels are unbalanced
It is idling. This is hard for an engine to do smoothly.
There are several things that can cause your Jeep to stall while idling. The timing may be off or your fuel filter may be clogged.
If the car dies while idling, the timing might be off. Other causes can include a clogged fuel filter or a bad spark plug.
the coil
There could be many reasons, a vacuum leak is one possibility.
One of your belts may be loose or in need of belt dressing.
A worn or loose out of adjustment drive belt could be the cause.
Your engine probably has a vacuum leak
It sounds like you have air in your fuel system.
You should check the timing and plugs.
it maybe just a timing problem