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Thanks! Is the +12 key plain yellow, or yellow with the black tracer? Generically, any (oem) yellow (or yellow/black?) wire under the hood should be +12 key? (Yes, I'll confirm myself with a meter..... :) I hate cutting through the insulation on a wire in order to tap into it, so I'm going to...

Hi, Is there an ignition-switched +12 lead somewhere underhood on a '90 4.0? I'm wiring in an aux cooling fan underhood, and looking for something I can use to trigger it on only when the ignition is on. I'd like to avoid trying to wire to the interior fuse box as the "empty grommets in the...

OK; thanks. I do need to keep the disconnect, so this won't work.

Hey.... Are those D30 shafts from a vacuum disconnect axle, and do you know what year that axle is? I'm looking for a spare set for my '90; I don't know what the spline count is though.. Thanks!

I bought a Borgeson shaft some time ago for a '90 XJ (non-tilt), and finally got around to installing it. The part number I have is 000893, which Borgeson confirmed was correct. Per their notes, my steering column requires a "double D" shaft :) (essentially, a "squashed" circle, with two...

Thanks; that listing was exactly what I needed. :) From the sounds of it, I'm going to try and find a wrecked auto XJ and gut the pieces that I need, rather than try to put it together peicemeal. I can check a manual transmission, but not sure how to test an auto in a non-working rig though.

Thanks for the raddesigns link. With it, it sounds like I just need the flexplate, TC, cooler lines, shifter, and trans. I was worried that swapping in the TCU would require a lot of sensors and increase the effort. It sounds like this rad designs shifter really just sends a signal to the...

Understood, but say I want to keep this particular Jeep... As I understand it, the transmission is all electronically controlled, and the NP231 should bolt right up to it. So it should just be a matter of finding the appropriate sensors and wiring harnesses? I put a/c into this rig in a...

I've got a '90 XJ with an AX15. It's set up pretty much exactly as I want, so I don't really want to replace it. However, my wife will need to start driving it in order to haul some gear, and the clutch too heavy for her to handle. I'm thinking of swapping in an auto so she can drive it. I...

Yeah, I agree there's probably something real going on. But, it did pass and I got my tags! :) I know the motor is tired and has some blowby, but there's an ongoing stroker project in the garage, so I don't want to over-analyze this at a shop (read $$) at this point when they're probably just...

Dredging from the grave.... Just FYI and thanks to everyone for their help. Swapping out the O2 sensor brought down the HC to passing levels, but the CO was about double the limit. (I ohm'ed the sensor, and it looked like the heater element must have died in it. So a Bosch lasts about 2...

I'd be happy to take it to a shop, if I could find one on the west side of PDX that I could trust. I'm leery of Dick's Jeep after they lost a set of ARP header bolts on my Dodge, and then claimed it never had them, and NW Jeep sent my XJ off with no oil in it after an oil change... If you guys...

I don't know of anyone with the drb scanner. I tested the harness yesterday, and it was all good. (pulled vacuum on each line with other end capped off. I did notice the the front breather was not blowing as much oil into the airbox as it used to after I cleaned out the valve cover ( the...

The sensor is (was?) a Bosch plug 'n play; I didn't want to futz with wiring. I don't think mine ('90 Renix) has a resetable computer like the OBD ones.

what intake/exhaust upgrades are you making? I'm thinking of doing the same conversion for my stroker build, but don't want to change out the intake/exhause, just to keep things easier. Since you have all the pieces, can you tell if the Renix intake and exhaust will work with the 7120, perhaps...

Wow; seems like I'm suspecting the completely wrong things.... I'd appreciate your help; please tell me what info you need. I don't think I have vac leaks, but I'll test the harness. The leaks I know of are from the two vent line off the top of the valve cover, but I think they are under...

I've never had the injectors serviced or cleaned, although I run a bottle of Techron every 3-4 months (I've had this XJ since new), and I just did the 3M topend/injector cleaner. Is there a way to check/test them at home, or a good place to do them cheaply locally? I'm building a stroker with...

Third time was not the charm for me... Do any of you guys have any ideas or tricks to get it through DEQ and tagged? It's a '90 4.0/AX-15, roughly 180k. Runs great and idles smoothly, but has a bunch of blowby (blowing oil out the filler plug). All the emissions harness, etc. are there and...

Is it possible to swap an HO head onto a Renix motor, keeping all the Renix injection and ancillaries? I have a '90 4.0 with a Borla header which I would really like to keep. I'd like to swap on an HO head. From what I was able to find, it looks like the Renix intake and exhaust will be able...

Thanks for the advice. I've had bad luck splicing harnesses before, so I'd rather tap a new port and re-use the known good working harness than to hack it up. I don't have my hands on the head yet, but is it safe to say that I either look for the for the mounting boss on the head, or find the...