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Here's an update: I bought a new Bosch sensor from a local parts store, and put that on. Also noticed that my cat was rattling (probably from cooking itself on the rich mixture) and my muffler was rusted through. Put in the new o2 sensor and had the cat/muffler/tailpipe replaced. 50+ miles...

I've reset the computer several times since I installed the new sensor. It runs great until about 30 miles or so, then it starts running like crap and the exhaust stinks. The problem started immediately after putting the new sensor in.

I spoke too soon. Once the ecu relearned everything (about 30 miles later), the rich condition returned. No code yet, though. It must be the O2 sensor. It's a "Standard OExtra" unit that I got for a steal on ebay...

^^^ I could hear it if i had the windows down in mid-high load situations. It was only a hairline crack halfway around one of the pipes, too!

Replaced the manifold and she's running great so far. No CEL, either. :)

P0171 System too lean. Must be that crack in the manifold making the sensor read lean, causing the computer to richen the mixture... Looks like I'll get to that manifold swap this week!

I got it off ebay, but it's a legitimate aftermarket brand. Been a good month since I bought it, i just forget what brand it was. Yes, I've disconnectec the battery several times. And a cel just showed up tonight! yay!

I replaced the upstream O2 sensor because it was having the same 2000 rpm stumble that the last O2 sensor fixed some 5 years ago. Now the jeep is running rich and idles really rough. No CEL, either. I'm aware of a small crack in the exhaust manifold (have a replacement waiting to go on) but...

Why don't the seals dry up when they're on the shelf at the parts store, then? My jeep has had a small rear main seal leak for years and it hasn't got any worse from the year that it sat.

My 98 xj sat outside on dirt in western Washington for a year during my deployment. Sta-Bil in the fuel tank and the battery was disconnected, it fired right up and I drove it home with no problems.

I thought about the deplorable state it's probably in after sitting outside for the past 11 months. Flat tires, dead battery, etc...

Soooo nice! I remember a time when mine was that clean!

Just saw this thread... Happy Belated Birthday! :cheers: To a safe trip back!

Nice! I kind of remember you calling me that night, also... And are those jeremy's old TOYOS?

It's intact now, thanks to George the Jeep! Sounds like a plan! :)

Thanks for welcoming and introducing me to the NWC. You and your family are some of the most genuine and giving people I've ever had the pleasure to meet, and you will be missed. I look forward to meeting up with you when I go home on leave. Thanks again to the Abronski family! :cheers:

All pictures aside, atleast you can check the box for a life experience that not many others have done!

Looks great! :cool:

Thanks everybody! :yelclap: I don't really remember what I was doing on my birthday itself, since all the days seem to run together out there. But rest assured, I'll find some way to celebrate my own belated birthday this weekend! :cheers:

Whoops... Attention to detail!