Originally Posted by NoDisassemble

Your issue sounds very similar to an issue I struggled with for a while. I changed a bunch of similar parts to no avail and scoured the forms for a solution. After a process of elimination I was able to narrow it down to the CPS (Crank Shaft Position Sensor). Its a pretty easy fix taking less than 30 mins and costing around $20-$60. Good luck, hope it helps!

Originally Posted by BrandynHG

while messing around today I found that the shaft/seal on the throttle body for the butterfly seems to have some excessive play. For testing reasons I removed the shaft and put grease on the seal and the Jeep has been running perfectly. I know this isn’t the correct fix, is there anyone that sells a throttle body rebuild kit with seals and bearings? Or will I have to go all new throttle body?

Originally Posted by Saudade

I'm not aware of a rebuilt kit, but here's a "hack" to temporarily fix it.

https://www.youtube.com/watch?v=ASvpGGE-XHU

I see used TBs on eBay for around $50. If you have a salvage yard nearby, you can get one cheaper. Now that know what to look for in terms of shaft play, you can likely pick out a good one.

Originally Posted by 97grand4.0

I did the harbor freight O ring hack myself a few years ago, did seem to work good. I would add something I recently discovered, the O ring on the idle air controller seems to be a "one and done" bc it neither fits neatly into the machined housing or around the IAC. and gets munched. Leaks. Consider a new IAC with O ring