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So for a while my 90xj has been giving me a ping right around 1750RPM and then again at 3500 RPM. It only does it when under certain loading conditions (usually going up a hill). Typically when it does this, I'll either back off on the throttle (it goes away) or I'll hit the throttle enough for...

So one thing I've been working on periodically over the last few months is trying to figure out how to upgrade all of the body lighting to LED. This has two benefits: Lower power consumption, and longer life. I will admit that power consumption is essentially not an issue, but longer life, with...

Since it's a common question where things are and where they're located, I'm trying to take a bunch of photos of where all the sensors are on my Renix Cherokee (1990) in the hopes they will help someone else. First up, Idle Air Sensor IAS after cleaning with brake parts cleaner and remoil:

So I'm back visiting the folks working on bailing my wife's cherokee out of here, she already paid california road taxes on it this year, it just needs to pass smog so I can drive it out of the state (without getting harassed by the local politzei). I did some work on it last time I was down...

So I knew this day would come sooner or later and just like the topic says my 1990 Renix Cherokee is now having this uncomfortable shudder, stumble and backfire issue whenever I try to put my foot into it. Rather than asking for advice (Cruiser, I know what you're about to post, I already did...

As some of you know I'm going through a big maintenance cycle trying to isolate, identify and fix all kinds of issues. I really want someone to check my math before I break something. So I'm doing the spin-on transmission filter add-on as long as I had the transmission pipes disconnected from...

Just to verify quickly, the renix system uses 3 temp sensors: 1) on the rear of the head, next to the valve cover, sticking up vertically - this one is the dashboard temp gauge 2) one the side of the block, looks to be between cylinders 2-3 - this is the temp sender for the ECU 3) temp...

I don't know exactly what it is, but when you baby a jeep, you're asking for trouble... A few weeks ago I did a massive fluid replacement on the heep, trans, oil, tc, front and rear axles, coolant, etc. I also did new plugs (autolite, IIRC), new cap, rotor and wires. Since then however, it's...

So I derped when I should have herped and managed to bust off the badly aged rubber on my front CCV elbow. I clearly need a new one, anyone know wtf they call these things? Napa's website thinks i'm smoking crack. Anyone know what this thing is called or have a part number?

Before you say CPS: I HAVE SPARK!!!! So I was going out to a client site down in socal after just driving down from WA in my 1990 XJ, parked last night over at my parents, this morning I saunter out, throw my tools in the car and start heading to work. Anyways, the vehicle started (but was...

So I'm missing out on all the nice weather up in WA right now trying to get the wife's jeep up and running to pass smog so we can get on with the move (reg is currently out). I havn't monkeyed with it much in a few months, but I need to get this thing up and running so I can take my truck...

So quick dumb question. I need to make a quick trip this weekend, and since I have an excess of family going who won't fit in the XJ we're going to take a bigger GMC crew cab, however since I want to try to sneak in a quick pig hunt, and maybe spend a few hours fishing, I wanted to take my XJ...

Among my long list of projects (both finished and not) one of the currently pressing ones is new springs to fix the saggy originals on my 1990 XJ, I think I have the rear's figured out, due in some part to the spring FAQ that listed some part numbers that eventually lead me to the right ones...

So one of the things that has always stuck in my head over the several XJ's I've owned over the years, is on my first one, I had a filter that was much larger (taller) than the regular PH/ST/etc 3985 filter. From what I can tell, the 3985 is essentially a filter I'm stuck with, however this...

So I'm planning on doing some mods to the jeep, mainly to dump the mech fan, and go with an e-fan setup. However, All the write-ups I've seen for that are for later HO series jeeps, not the older renix (Mine is a 1990) which is going to complicate things quite a bit. I've replaced the waterpump...

So I'm in the process of doing some upgrades, and need some input. I want to do an e-fan mod, as with the weather being as cold as it has been, it takes forever for everything to get up to temp. I figure just shutting the fans off until the engine gets up to temp will help a lot. Originally, I...

So I just got done (yea, took me a while) with an ABS Delete from my 1990 XJ Laredo. I took a bunch of pictures, but have not had time to organize or edit them. The path I took to perform the ABS delete was the same as the booster/MC upgrade done by a number of people covered in this writeup...

So I'm trying to plan some vehicle upgrades including some new stock springs and tires. The front coils seem to be in OK shape, but as usual, the butt is dragging, so new springs will take priority over new tires. That said, I've been looking around, and I'm thinking either the General Tire...

So I have a u-haul trailer hitch off my old 89/90 XJ that I pulled off when I dumped the vehicle and bought a 1990 that already had a hitch installed. Me and a buddy of mine were thinking about putting it on his '99 XJ, and were not sure if it would fit, I know they made a number of mods to the...

I have a mostly stock 1990 XJ, CARB model. I just drove up to washington, and it's developed a bit of an issue that I still havn't quite been able to figure out. Under power (climbing a hill, or accelerating) I get a subtle yet annoying vibration. So far I've replaced the cap/rotor/plugs/wires...