XwalkerX

so on our way home tonight i noticed the jeep started running very poorly when we would come to a stop light however if i put it in neutral at the light it would run perfectly normal.
we were close to home but i hooked up my OBD reader and took a quick screen grab of the intake pressure because im wondering if its vacuum related. (i suspect this because every now and then our HVAC will randomly default to defrost and from what i read that means no vacuum is going to the system)

anyway here is a screen grab.
the first part of the graph is foot on the brake in drive then i popped it in neutral still with my foot on the brake and you notice the dip in manifold pressure




also here is a video showing the symptoms

https://www.youtube.com/watch?v=KDRVi2da3h4



any ideas/insight/help would be HIGHLY appreciated