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My 93 XJ has 349,000 on original engine and still is my DD

My 93 did the same thing till I added the LSD friction modifier to the rear diff

The plastic line that is broken needs to be fixed. It is a vacuum line. The top picture could be a ground, but probably is a mounting attachment to keep the wire from falling down. Mine is also not attached. Someone on this forum will know what it is.

My 93 has been making that sound for the last 100K.

I had a similar problem with a clogged heater core on my 93 xj. I tried flushing and flushing, still no heat. As a last resort, before having to replace the heater core, I flushed the core with muratic acid. If your core is brass the acid will not eat through it. Disconnect all hoses to...

When you changed the rear diff fluid, did you put the limited slip additive in? If not, that's why you have problem #5. Happened to me.

Welded mine 3 years ago or about 70,000 miles. Still holding.

Just do a drain and fill on the tranny. I doubt the oil pan gasket is leaking, but rather the valve cover gasket or rear main seal. These 4.0 engines all leak, but they run for a long time. My '93 just hit 242,000.

Just guessing, since no year, engine size, etc. was posted. May be the OBDII connector.

Have you priced a tranny from the local boneyard?

If nothing else, it will keep the bugs off the windshield! Let us know how it works out.

Starter motor.

Timing Chain?

My starting power improved when I replaced my 16 year old cables on my 93.

You said you just replaced the O2 sensor. Was it running better before you replaced it? Sounds like it's running too lean, maybe a bad sensor?

If that is the tranny you have, check the shift shaft seal. Common leak.

The wife will not drive it. You have to move it out of the driveway so you can take pictures of the kids, because they don't want the heap in the picture. When you have the hood up, and the neighbors ask "What's wrong with it now?"

OP seems normal for your odometer. Check the valve cover gasket before you go pulling the oil pan to replace the rear main seal.

My 93 XJ takes a 9/16" Hex. Check it before buying the torx.

Why not just put a vacuum gauge on it. If it reads normal at idle, but drops to 0 and stays there when you start increasing rpm's, then I'd say it's your cat.