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And my 99 SE came with all the OEM skids because it was government/university fleet vehicle I assume

I have not yet. I was considering getting 4/12 hole injectors and not even bothering with cleaning the old ones I have. But maybe some injector cleaner in the meantime is warranted!? Digesting your list now!

Lots of great advice here, it seems! Sorry for my hiatus, traveling for work a lot. That said, can any of y'all recommend good tune up parts? Rad Cap, spark plugs and wires, distributor and rotor of choice?

It is such good advice that it goes over my head and feels like "future me" has a lot to learn

Now thats a pro tip right there

OK, great. I will look up how to test O2 sensors along with doing the fan clutch test. And try to do a deeper dive into thermostats. Thanks

That makes good sense. Thanks. Are there typical MPG-related problem-child sensors that pop up regularly on the XJ vs. other vehicles? They are maybe not throwing a code but maybe could get cleaned? I think most of the sensors on the throttle body qualify for this probably and I badly need to...

Since I only have idiot lights and cant watch the temp, how does one test their fan clutch to see if it is a problem? Bluetooth OBDII + an app to watch the data/use digital gauges? Would happily do a replacement fan if needed, XJ model is fine by me. And I 100% know a coolant flush has to...

Also auto AX4 paired to 231 and the8.25 w 3.55 gears

***TLDR***- new to all of this. Was told I should come here from my previously misplaced thread. 1999 SE, 4.0, 4x4, basic interior everything except cruise control, no missing parts or aftermarket mods, 39,500 miles, former university campus truck. That said, this XJ will surely outlive me...

Ok, thanks y'all! I will definitely try reposting a version of this on the main OEM Tech thread, too. I think I tried posting them too close together with the same title so auto-mod probably nixed it.

Cross posted to the main XJ sub. Realized this was probably better for that location.

Originally posted in Daily Driver before I realized this was the better spot. TLDR- new to all of this. This XJ will surely outlive me at this point when I am done restoring it so... Where do I start? Is there a thread or 5 that someone can point me to about how to know what parts are reliable...

TLDR- new to all of this. This XJ will surely outlive me at this point when I am done restoring it so... Where do I start? Is there a thread or 5 that someone can point me to about how to know what parts are reliable and basic maintenance process/order of operations on the XJ in general? I can...