So, I finally got my jeep back from my cousin whom I was lending it to. (regret but anyways.) My plans to do first is to fix the surging/ bad idle issue. gonna start by cleaning throttle body and that one sensor behind it. I took it 4x4ing today and realized i need to cut the rear fenders (was rubbing on the trail). And i was also looking to see what other cheap or free upgrades I could do to it. It is currently completely stock. So any cheap or free things I could do to make it go down the trail easier or just run better. kinda runs like junk right now. and gets a little warm going down hill... which is odd, no other time.

Basically just want suggestions on what to start on.