Hi all, 98 XJ with 121k miles.
Since I've gotten the Jeep, I've noticed that it will idle poorly only certain times -- namely, in the afternoons. I only see this when I leave work, around 3pm in the afternoon, and the sun is out, and the weather is at its warmest for the day. I'm in TN, and with it being winter, we're only talking like 40-50 degrees F in the afternoon. This hasn't affected performance at until recently, and usually it drives fine afterwards. Today I did notice a loss of power until after I got about a mile down the road, then it drove normally.

My question is can you guys think of any sensors that might be affected by heat? Even through it's not that warm right now, I'm sure it's warm under the hood with the sun out. Like I said, this is the only pattern I can see.

I'm including a video of this attached below.

Also, list of new parts in the past month:
- both o2 sensors
- IAC valve
- TPS sensor
- exhaust manifold
- plugs and wires

Any input is appreciated, thanks.