HOrnbrod Posted April 6, 2009 Share Posted April 6, 2009 I know this is like asking for the moon, but I'll ask anyhow: I picked up a NOS XJ HO fuel sending unit, and I need to "borrow" a sender from a 91 or 92 MJ to see if I can mod the XJ sender to fit an HO MJ. If it's broke or toast that's okay, just need one to work with. Perhaps with a little creative cutting, bending, and brazing I can get the XJ unit to fit in the tank and work. I know about the tank baffles, etc. but I'm thinking maybe a mod is possible. Link to comment Share on other sites More sharing options...
87Warrior Posted April 6, 2009 Share Posted April 6, 2009 Sorry I am of no help.... but, I will be following this thread to see what you come up with. Be sure to keep us updated! Link to comment Share on other sites More sharing options...
mjeff87 Posted April 6, 2009 Share Posted April 6, 2009 X2, subscribed :brows: I've got a NIB Airtex XJ HO assembly sitting in the parts bin I'd love to be able to use. Jeff Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 10, 2009 Author Share Posted April 10, 2009 Well, I didn't think so. I know these things are hard to come by. Guess I'll just wait until mine craps out and go from there...... :D Link to comment Share on other sites More sharing options...
shelbyluvv Posted April 10, 2009 Share Posted April 10, 2009 I will be dropping the 97 XJ's tank in a few days. I am going to try and make the XJ tank and sender work in the MJ. Like most here I am coming up empty handed on finding a HO pump and sender. Even if I do find the HO parts I am not sure the sender will work with the 97 electronics. I may have to put the tank in the spare tire location if it won't fit in the stock location. Which I doubt it will because of the size of it. We will see soon enough. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 10, 2009 Author Share Posted April 10, 2009 I will be dropping the 97 XJ's tank in a few days. I am going to try and make the XJ tank and sender work in the MJ. Like most here I am coming up empty handed on finding a HO pump and sender. Even if I do find the HO parts I am not sure the sender will work with the 97 electronics. The 97+ sender/pump assembly is kind of a modular unit, but it still has a float that varies a potentiometer. So an old MJ HO sender should work, IF the HO sender pot's value (105 ohms) is close to the 97, and the polarity is the same. Link to comment Share on other sites More sharing options...
mjeff87 Posted April 11, 2009 Share Posted April 11, 2009 I'll make you a deal Don.....if you or anyone else can get me a Renix assembly (4.0), I'll swap it into my MJ and send you the HO one I'm currently running. It works fine with my Renix, sans the fuel gauge ;) Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 11, 2009 Author Share Posted April 11, 2009 I'll make you a deal Don.....if you or anyone else can get me a Renix assembly (4.0), I'll swap it into my MJ and send you the HO one I'm currently running. It works fine with my Renix, sans the fuel gauge ;) Hey Jeff, I must have missed something. I know you swapped in a Renix 4.0, but why do ya have the HO sender/pump? Did you also change your gas tank with a 91-92 tank? :huh???: :huh???: Link to comment Share on other sites More sharing options...
mjeff87 Posted April 11, 2009 Share Posted April 11, 2009 No, kept the same tank but swapped out the 2.5 pump assembly with a 4.0 HO one from out of the junkyard. I know, I could have just swapped the pumps between the two units, but opted to just switch the whole assemblies (plus my old 2.5 setup is now living inside one of Pat's MJ's). Like I said, it runs fine, except my fuel gauge reads backwards, and is off by a good 3/8 of a tank :( Jeff Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 17, 2009 Author Share Posted April 17, 2009 Well, this project is over. I found a NOS HO MJ p/n 4637184 fuel sending unit buried in the archives of Ebay, send the guy an email, and he still had it, $55 shipped. In comparing the XJ and MJ HO units, I suppose the XJ unit could be modified, but it would take a lot of creativity. About the only common part is the potentiometer itself and float. But it's real easy to change the sender's output voltage polarity and use it in a Renix application. Both ends of the pot have solder terminals. Simply remove the BLU wire and resolder it to the other leg of the pot and the voltage output polarity to the gauge is reversed. Tested and verified. :D I do not have a Renix sender but I'm sure this will work as well providing both ends of the pot are accessible. Link to comment Share on other sites More sharing options...
jeepdoggydogB Posted April 18, 2009 Share Posted April 18, 2009 Well, this project is over. I found a NOS HO MJ p/n 4637184 fuel sending unit buried in the archives of Ebay, send the guy an email, and he still had it, $55 shipped. In comparing the XJ and MJ HO units, I suppose the XJ unit could be modified, but it would take a lot of creativity. About the only common part is the potentiometer itself and float. But it's real easy to change the sender's output voltage polarity and use it in a Renix application. Both ends of the pot have solder terminals. Simply remove the BLU wire and resolder it to the other leg of the pot and the voltage output polarity to the gauge is reversed. Tested and verified. :D I do not have a Renix sender but I'm sure this will work as well providing both ends of the pot are accessible. Don,If I only took pictures of my RENIX sender unit! If the reverse is true and we simply had to resolder the wire to the other leg to turn it into an HO compatible unit that would make my year! Thanks for all your diligent work on this. :cheers: Link to comment Share on other sites More sharing options...
Wildman Posted April 18, 2009 Share Posted April 18, 2009 Here a picture of a Renix sender unit. The sending unit looks a little different that the one you posted from the HO unit :hmm: If you need a better picture, let me know. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 18, 2009 Author Share Posted April 18, 2009 Here a picture of a Renix sender unit. The sending unit looks a little different that the one you posted from the HO unit :hmm: If you need a better picture, let me know. The HO fuel senders were standardized for the 91-92 HO MJs; one sender fits both MJ tanks, unlike the Renix senders that were different for each tank. The pumps are different too between the Renix and HOs too, as I'm sure the learned Wildman knows. :D The tag on my 91 sender harness (still there amazingly) matches the tag on the new unit I acquired. Bob, can't quite make out the potentiometer on the MJ sender. Is the opposite leg of the pot accessable to resolder the fuel gauge wire? Or is the pot sealed? Link to comment Share on other sites More sharing options...
Wildman Posted April 18, 2009 Share Posted April 18, 2009 I'll check it out tomorrow and let you know, It's been a while since I've played with the sending unit, I think the "cover" just pops on (or screwed on) and I'll check that out, and get some close up pictures for you. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 18, 2009 Author Share Posted April 18, 2009 Roger, thanks Bob. Could help out quite a few guys here if it's it doable to get their fuel gauge going in the right direction. :D Link to comment Share on other sites More sharing options...
cody4359 Posted January 16, 2011 Share Posted January 16, 2011 possibly a dumb question cause it states this is for a 91-92 HO, but i have to ask. from what ive been seein is that when i complete my 96 xj 4.0 and wiring swap into my 89 org 2.5 mj, my fuel guage will reard backwards. no will reversing that wire on my 89 sender correct my problem? Link to comment Share on other sites More sharing options...
Exgrayxj Posted January 11, 2012 Share Posted January 11, 2012 Here a picture of a Renix sender unit. The sending unit looks a little different that the one you posted from the HO unit :hmm: If you need a better picture, let me know. :shake: WOW! I am glad this popped up! According to Wildman's pic, I just found that I have a XJ sender in my stock w/tray shortbed tank! :idea: No wonder things don't go together well, and the steel lines are bent/twisted. My stock, non tach dash gas gauge worked fine, but after swapping in the tach panel, my gauge read backwards, tho the low fuel light worked in the normal fashion. It appears that the renix xj guage wire is not reversible, so it may be that the gauge panel I used had at sometime been replaced with a HO dash gauge. I'm getting another set of gauges, after I get the tank headaches straightened out. :fs1: :doh: And my mj is a '90. Link to comment Share on other sites More sharing options...
tugalo Posted January 14, 2012 Share Posted January 14, 2012 Don, I wonder how hard it would be to cut thru the printed circuit on the back of the gauge cluster and reverse the polarity at that location with a couple of soldered wires? Just a thought Link to comment Share on other sites More sharing options...
MiNi Beast Posted January 23, 2013 Share Posted January 23, 2013 Ok so is this the answer to the empty but full tank of gas dillema? Link to comment Share on other sites More sharing options...
Futurecomancheowner Posted April 15, 2015 Share Posted April 15, 2015 I just put together a ho pump and sending unit into my renix fuel pump assembly, and it works, the arm for the float is a little short but that just means it's going to read "full" longer Link to comment Share on other sites More sharing options...
Rockfrog Posted April 16, 2015 Share Posted April 16, 2015 Good to know since I just pulled a brand spanking new Bosch pump assembly from the tank on my 92 parts XJ. I was wondering if they would work together. Link to comment Share on other sites More sharing options...
Tykerp Posted April 10, 2016 Share Posted April 10, 2016 I looked all over the internet for a 91-92 comanche sending unit. I never was able to find one. I was buying some other stuff at Autozone and the guy asked me if I needed anything else. Just joking around I said not unless you can get me a fuel sending unit for a 91 or 92 comanche. He looked it up and had it in stock. It is a delphi pump and sending unit combo. It is a little different than original but it works great. Fuel gauge reads real accurate. It comes with a delphi pump. I would recommend throwing that away because it is noisy as hell. My jeep sounds like an s10 with that annoying fuel pump hum. No modifications needed just set it in and your gauge will be accurate for 79.99. Now the Ho swap is basically done and everything is working. I forgot to grab the part number but, i will post that up later for you. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 10, 2016 Author Share Posted April 10, 2016 Good find! http://www.autozone.com/fuel-delivery/fuel-tank-sending-unit/delphi-fuel-tank-sending-unit/jeep/comanche-2wd/1992/6-cylinders-s-4-0l-mfi/342630_806538_0/?checkfit=true Image Not Found Link to comment Share on other sites More sharing options...
Minuit Posted April 10, 2016 Share Posted April 10, 2016 Have I lost my mind or do we now have a source for new manufacture HO senders? Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 10, 2016 Author Share Posted April 10, 2016 I compared the pics to my NOS unit and it looks very close. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now