jeepy2013

Here; MTS

Any word if MTS plans to release a 91-92 sender ?

I am actually picking up a complete '94 XJ for parts tomorrow, I think I'm going to swap the column, wiring and everything over the MJ just to make it easier and not deal with the '96 gremlins.

I probably woulda have stuck with the '96 conversion, but everything was just done hodge podge. Thats not my way. I got to cleaning up the inside of the cab and I have rust (yes even here in FL) Guess thats what 30 years of water leaking does.....lol It's not bad though and it's the only rust anywhere on this MJ. Overall not too bad.... I Driver's side is the worst, I'll clean it up and weld in some small patches.... Passenger side just a couple of very small holes....

Well, I haven't given up on this project. I was able to get the engine bay all cleaned up and painted. I just ended up going satin black, was a little easier being the engine bay had 3 different paints on it, so I did some cleaning and sanding here and there and called it good. Not sure if I'm going to stick with the original red body color anyways. I have given up on the '96 Swap though.......as I dug into it further, nothing was done right. Things were loose, missing, broken or just done wrong. So....I took the dash back out, removed the '96 dash harness, '96 steering column, seat and rubber mat to clean up the floor pan and get it painted. So, now my options are to find a older parts XJ because I can find them dirt cheap here, probably like a '92 so I can swap everything into this MJ, or I already have a good running '98 XJ that I can do the full swap (wiring, engine, interior, front clip, doors, etc). I know the full '98 swap is a huge undertaking, so I'm on the fence.

WOW....after seeing this I'm so thankful my cab corners / rockers are rust free. Sometimes it's even hard to find rust free stuff in FL, luckily this one spent most of it's life inland in Gainesville. Having grown up in CT and having to repair my fair share of rotted cab corners, rockers, floor pans, etc. I can certainly say I do not miss having to do that stuff.

OK, I thought a HO sender would work, and I got all happy that I found a listing for one on Rockauto for '92 MJ, but apparently its not quite the right one as they list the same one for '92 XJ.

From everything I've read online, the gauge reads backwards with the newer XJ cluster in a MJ, ie; Full is empty , Empty is full. I haven't got that far with my wiring yet. I pulled out the engine, trans, transfer case and engine bay harness to pressure wash and repaint the compartment. Good thing I did, the torque converter was bolted to the flex plate with 4 different bolts, the holes in the flexplate were all egg shaped, the drivers side motor mount was was completely broken, the trans mount was wasted. I don't know why someone would swap all this stuff in and not look at or change anything that needed to be replaced before doing it.

This is what I was thinking at first as well. Then I was looking at some other options like retro fitting a higher pressure pump to the stock sending unit assembly, I saw mention of someone using a Mustang pump or something. Or.....a external high pressure pump, with a external pressure regulator. Would just have to figure out plumbing. Then there is the issue of the fuel gauge reading backwards. Is the gauge issue the difference between a MJ and XJ sending unit / gauge ? or just the years. I'm stuck with what I have to make this work..... I guess, other than buying another parts Jeep to use for swap parts.

Thanks for the link. I'll be using the MJ rear body harness that goes to the tank. The tank in the MJ is brand new and I was told the fuel pump was as well, but I don;t know what the PO put in for a fuel pump. It may be the replacement for the 2.5 or he put a 4.0 pump in there, I couldnt really get accurate info. I'll have to drop the tank and see whats going on. My concern was the difference in fuel pressure, the pre '96 models run lower pressure and the 96 model runs 49 psi I believe. Maybe I could run a aftermarket high pressure pump with external regulator and draw fuel from the stock tank pickup. Really getting the fuel system sorted out seems to be my biggest hurdle.

I knew the '96 swap was a can-o-worms, probably why the previous owner bailed on the project. I bought it cheap so it was well worth it still for a solid rust free MJ, plus I have a ton of stuff I can sell off if I go another direction. I guess I have some options, try to complete the '96 swap , try a '98 swap ( I have a complete 98 XJ ) , find a renix donor XJ or.....who knows.......lol

Upon further research I think you are right. RA shows the same TYC part # for the '92 MJ and for a '92 XJ

Hello all, this is my 1st MJ and 1st post. I've had a bunch of XJ's over the years, but never managed to get my hands on a decent MJ. Well I just purchased a 100% rust free '88 MJ. It was originally a 2.5 , auto, 2wd. The previous owner started to swap in the complete '96 XJ drive train (4.0 , AW4 , NP231, D30) into this truck. They swapped over the entire engine harness, dash harness, cluster and steering column, brake booster / mc from the '96 XJ. Alot of stuff was loose, unhooked, etc, so I pulled the drivetrain out and engine harness so I can clean it all up and start fresh. I know I have to adapt the 96 xj interior harness to the MJ rear body harness. My biggest hurdle seems to be the fuel system. Whats the best way to go about this? It has a brand new MJ tank in it, supposedly a new pump too, but I think its for the 2.5. Can I simply swap in a '92 pump / sending unit (rock auto lists one for '92 MJ 4.0) into the tank and change out my '96 fuel rail with one from a '92 with the regulator? will the '96 motor run on the lower fuel pressure? Or am I going to better off trying to swap in a different tank? modify a 96 xj sending unit? I've been searching and looking for a week, alot of conflicting info out there....and my head hurts! I don't want to run a fuel cell, I'd like to keep a stock style tank of some kind underneath. All of the original renix stuff is gone , none of it came with the MJ so I don't have any of that to work with. This is kind of a mess with this '96 swap, but the body is in super good shape so I think it will be a great foundation for a nice build. Any help would be greatly appreciated.