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I have a 2 door XJ that I bought a long time ago to be a drivetrain donor for my MJ. This was a long time ago, maybe 12-13 years and well back before XJs were becoming collectible. It's a moderately built Jeep with typical northeast rust. The uniframe at the driver's side foot well is basically...

What's the latest guidance on PCM tuning? It looks like HPTuners had a viable product for a while, and then end-of-lifed the MPVI2 dongle for the MPVI3 which has borked the JTEC+ plus support and even today people are bricking their PCMs in spite of supposed support. What other options are...

Hey Gang, Planning to tear into the XJ this weekend. It's been parked for 10 years and I hope to get it back on the road. When the Jeep was parked it had a cooling system issue. It was a long time ago, but from what I recall the Jeep would overheat if it was pushed hard. If you just...

Good Day! I've been away from modifying XJs for about ten years. I have a moderately built XJ (32s, long arms, armour, etc.) that has been completed and used for the last ten years and I have a couple of stock XJs and an MJ project that needs some love. One of my XJs (2001 Classic) has been...

I'm having a problem with my 2001 Sport. I blew the fuse for the left side running lights by turning on the interior light in my trailer. Fine, Inspected the fuse, burnt out, replaced. Everything seems to work... But... When I turn off the Jeep, turn off lights, remove key, the parking...

Is it just my imagination or is the sheet metal used on the RENIX era Jeeps thicker than the later ones, particularly the 97+ Jeeps? I can feel a difference in the body of my MJ and the old RENIX 4 door I had years ago seemed like the sheet metal was thicker - had a different ring to it when...

Just thinking out loud... I'm not totally convinced a 545RFE is all that but just kicking ideas around. XJ or WJ project vehicle - Jeep I6 stroker - 5 speed PCM from XJ donor - 545RFE out of a WJ - PCS stand alone controller for the 545RFE The XJ would take to this quite readily...

Is there such a thing as a web site dedicated to the 4.7 V8? Something like jeepstrokers.com but just for the 4.7? I'm looking for examples of engine that have been built up, anecdotal maintenance histories, that sort of thing. Thx.

I replaced the power steering pump on my Jeep (2001, stock PS pump and box) and now I have some issues that almost seem like a "bleed the system" problem but I'm not certain. If the Jeep has been sitting for a while (i.e. drivetrain completely cold) when I first start the Jeep it takes a couple...

I'm looking for a dyno plot/chart for a 2001 Cherokee 4.0. I thought I had one but it is the 2004 WJ 4.0: It's probably the same for a 2001 but I'm interested in comparing if the curve has a different shape or not. Let me know if you have one for 2001 or earlier or any other Jeep engine dyno...

I'm looking for a hard copy of this for my collection: Checked amazon and eBay with no luck. Any one have a copy they want to part with?

Yeah, as the subject says. This is on the work horse. Not always, but most times at start up. Still passes the stricter e-test sniff test in my jurisdiction so thinking it is a start up only thing (i.e. not rings). Leaking valve seals? This is an ACH replacement 0331 head I put on the Jeep...

On our most recent trip (three weeks, ~7,000 kms, five provinces) we ended up getting stuck in Corner Brook, NL for an extra five days for want of a power steering pump. Of all the parts to get stranded by... a ~$50 PS pump. I want to put together a couple of extra parts to go into the boonie...

Finally got around to playing with a ELM327 wifi adapter (cheapie ebay doohickie) and Torque Pro on my phone (Android Nexus 5). I was kind of disappointed in the refresh rate of the real time gauges and data stream. I didn't get a lot of time to play with it but... Is this typical for these...

I swear there is something goofy encoded in the maps of the 2001 (2000 as well?) Jeeps. First the description and symptoms. TLDR;? Case 1: The Jeep is towing heavy, Jeep weighs ~5000 lbs loaded, 32" tires, 4.56 gears, trailer is ~3000-3500 lbs, towing in heavy grade coastal mountains at under...

It's been a week since I finally buttoned up my 2001 Jeep with a Banks Torque Tube header, APN stainless mini cats, custom stainless cat, new NTK O2 sensors and Gibson stainless cat back. I didn't get around to making a new 2.5" S-pipe - basically ran out of time. Also added a Chinese copy of...

<yes, living in the salt belt sucks> Finally got the Jeep out of the shop yesterday. One of the things that has been bugging me every time I looked at it on the jack stands was the way the end of the tail pipe ran so close to the shackle bolt. The shackle is aftermarket, forget exactly what...

I tried copying Tony_SS's transmission cooler install but have run into an issue in that either it didn't come with the correct/ same fittings or I'm doing something wrong. Here's Tony's install: http://www.naxja.org/forum/showpost.php?p=246080868&postcount=53 I got the exact same kit... kind...

Can I get some help setting up a brake controller for my XJ? I had the 4 pin flat setup but I want to add a brake controller and a 7 pin output in order to actually use the brakes on my trailer, charge the battery, etc. I have been eyeing these items: Controller...

What's the latest guidance on good fluids for our Jeeps? I know the specs called out for our Jeeps, that's not what I'm after. Reading up on modern oils and reading about internet zinc fear mongering has me mildly freaking out about what to run in our tractor engines going forward. This isn't a...