bucketheadben

I'm having an issue with my project MJ. Let's start with its history first. It's a 99 Cheromanche. I've pulled everything from my old 99 XJ and stuck it in this MJ. Image Not Found In order to keep the fuel tank in the stock position, I swapped in the H.O. fuel rail, injectors, lines and pump. The problem is whenever I try to start it; it takes about 5 times before it will fire up. Once it fires up, I have to work the gas pedal until the idle smoothes out or it will die. After about a minute of that, it will idle on its own and run fine. At this point I can kill it and start it back up with no problems. I just pulled and cleaned the throttle body and sensors on it, but it didn't seem to help. Any suggestions? Thanks Ben

There are some good looking bumpers in here. I got some pretty good ideas from them, even an idea of what color I don't want to paint my bumper. :D

Thanks Pete. Lots of good ideas in there. Do you guys have any pics of your mounting plates like 89eliminator? Ben

The MJ's wheels are turning under it's own power again. I've got the mj fuel tank in it's stock location thanks to a few guys here on the forum. viewtopic.php?f=2&t=14996 Now that it's been running, I was able to charge up the a/c and freeze out that little cab. :D I've got a few things left on the list before I can start driving it. Then comes the fun stuff. I can't make up my mind, 33's or 35's?

Hey guys, I'd like to get some ideas on rear bumpers. Post up your rear bumper pics and mounting plates. Thanks Ben

I just finished splicing in the wires for the fuel injectors. The fuel rail is full of gas and I'm getting spark to the plugs but it will not start. It turns over and it sounds like it's trying to fire but all it does is sputter while the starter is engaged. Any ideas? Thanks Ben

Well, I'm almost there. Since I can't find a MJ H.O. sending unit, I stuck the Renix assembly in the tank. So far I've got the tank and pump back in it's original location, installed a fuel filter, H.O. fuel lines, fuel rail and injectors. I've spliced the wires so that the fuel pump adapts to the 99 harness. I've got the pump working and the fuel rail is pressurized. Now all I have left is to splice in the H.O. injector wiring harness and fire it up.

Sorry, I should have said "fuel pump assembly." That is what I ordered from autozone. I've checked autozone, advaced, napa and pepboys for a MJ fuel pump assembly, but they all have the same part number as the XJ.

Oh, I forgot to mention that the problem with the fuel pump from auto zone was that it would not mount in the MJ tank. The pump would hit the slosh tray. The renix pump that I have goes into the tank at an angle and into the tray. The auto zone one just goes down and hits the tray.

Well I had a good day at the junkyards. I scored wiring for the H.O. injectors, 2 fuel lines, mounting hardware for the tank, the locking ring for the pump and the carpeted interior panel behind both seats. All for $20. I already have the H.O. fuel rail and injectors so now I just have to hook it all up. On the down side the fuel pump auto zone order was wrong. I had the check and it has the same part number as the Cherokee fuel pump. Does anyone have the part number for a 91-92 Comanche fuel pump or do you know where I can purchase one? Until then I'll hook up the renix pump I have and get it running for the time being. One other question. The 99 fuel pump has 4 wires, and the renix has 3. How many wires are in the H.O. fuel pump? And does anybody have wiring diagrams so that I can splice everything together? Thanks again for all your help. Ben

I just went out and looked at the renix pump. The return line dumps in to the tank. It doesn't got into the pump. If the H.O. pump is plumbed the same way, would it vapor lock? :hmm: Ben

Nope, no return line. I'm sure of it. It has one fuel line and a vent line. So should I just cap the return? I will be buying a 91-92 pump tomorrow. I just had a renix pump handy so I was using that as a reference. Thanks again for the help. Ben

That's excellent news guys. Thanks. I do have one other question. I was looking on the the Renix fuel pump and it has a return line. Should I just cap it off? Ben

Is that all that I have to do? That is too easy! :bowdown: I thought they ran at two completely different PSI's.

I need to use the 99 fuel pump and it won't mount in the mj's tank.