congrats on the new Jeep.
you need to take off and clean the throttle body really good ( you can find many detailed instructions on here just do a search. you also need to replace the iac ( idle air control )
and tps ( throttle position sensor ) both located on the throttle body and you will have them off while your cleaning it any ways.
also if it was me i would replace the up stream o2 sensor
feel free to give me a call if you have any question as you do these.
The good thing about owning a Jeep is the it will make you a master mechanic but it is the best classroom training you will ever get
It only does it after its warmed up or should I say it does it worst when it's warmed up. The guy that had it before me replace plugs wire and cap but nit the button. When I got it there where 2 volts missing of the manifold so I replaced them. The word I got from him was the motor has been rebuilt maybe 10,000 miles ago not sure how much of a rebuild was done.
Everyone of the bolts on mine where loose but 2 of them. I have not put but a hundred miles on it since I changed mine out will let you know if these start backing out. If the do I might put some thread lock on them