Join Date: Jun 2003
Location: Wichita Falls, TX
Cracked exhaust manifold? O2 sensor issues?
I'm not sure how common it is on the WJs but the Wrangler side's 4.0s are notorious for cracking exhaust manifolds which causes fuel mixture problems.
That said, it would be a kinda obscure reason you were getting warm.
13 GC Overland - (Wife's DD) 5.7, stock
Past Jeeps: 99TJ, 78CJ7, 91YJ, 01WJ, 03TJ, 05KJ