Just got a MJ - JeepForum.com

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post #1 of 21 Old 02-11-2011, 08:23 PM Thread Starter
Bthelton
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2004 TJ Wrangler 
 
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Location: Hickory,NC
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Just got a MJ

I recently purchased a MJ that a buddy and I started and he got side tracked due to his shop and other projects. Here is the specs....its a 88 or 89 and has a 2000 XJ powertrain and drivetrain. My question is do I need the XJ fuel pump as well or will the MJ pump run the XJ fuel system being the MJ was fuel injected to?

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post #2 of 21 Old 02-12-2011, 09:29 AM
Pete M
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1988 MJ Comanche 
 
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did he do the complete swap with the entire 2000 wire harness and dash? or just swap in the engine block?

-88 MJ; 4.0L, ex-2wd, TJ ax15/231, 78 Ford D44 w/spool, 9" w/posi, 33" trXus MTs, custom roll-bar/bumpers/etc.
Also an 86 MJ Metric ton and 2 '90 MJs
Projects/wheelin' pics: picturetrail.com/petermontie
My email: petermontie@hotmail.com
ComancheClub.com/forums
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post #3 of 21 Old 02-12-2011, 09:53 AM Thread Starter
Bthelton
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Quote:
Originally Posted by Pete M View Post
did he do the complete swap with the entire 2000 wire harness and dash? or just swap in the engine block?
well he bought it and I helped. we were in the middle of swapping the harness and all
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post #4 of 21 Old 02-12-2011, 10:10 AM
Crunch
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I think the old system has a return, and the newer XJ stuff is return-less.. You will probably need the pump and fuel line set up.

New one-2000 XJ sport- Now has 3.5" lift, Hp 30/8.25 w/4.10's, V8 Zj steering
Totaled 3/18/10-'99 Black 2 door XJ DD, 3.5+" bastard lift.
SOLD-'98 TJ 4 banger 5 speed, 4.88's, Hp 30 ARB'd, S35 w/Detroit and truss, RK LA's, Kilby skids and LOTS of other junk. Should have kept it!
Traded for my XJ - '98 ZJ was pretty and built at one time- Hp30, 8.8 and 5" lift and other stuff.
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post #5 of 21 Old 02-12-2011, 10:28 AM Thread Starter
Bthelton
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I would have check that out
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post #6 of 21 Old 02-12-2011, 10:49 AM
Pete M
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1988 MJ Comanche 
 
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there are a couple guys at the comanche club that have done the swap. should find the info you're looking for there.

-88 MJ; 4.0L, ex-2wd, TJ ax15/231, 78 Ford D44 w/spool, 9" w/posi, 33" trXus MTs, custom roll-bar/bumpers/etc.
Also an 86 MJ Metric ton and 2 '90 MJs
Projects/wheelin' pics: picturetrail.com/petermontie
My email: petermontie@hotmail.com
ComancheClub.com/forums
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post #7 of 21 Old 02-12-2011, 07:53 PM Thread Starter
Bthelton
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needing a little more input!!
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post #8 of 21 Old 02-14-2011, 12:16 PM
75SV1
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I am fairly certian you will need the fuel pump from the 2000. In '98, the Cherokees went to a returnless fuel pump. At least my '98 doesn't have a fuel filter. So it would be best to swap in the 2000 fuel pump. I do as PeteM suggest and look over at the ComancheClub or this build thread:
http://www.jeepforum.com/forum/f22/99-mj-build-881250/
I think the guy removed the pictures, though.
Tom
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post #9 of 21 Old 02-26-2011, 07:40 AM Thread Starter
Bthelton
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Got myself a Dakota fuel tank and the Cherokee fuel system fit in it. Goin to get it mounted maybe today
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post #10 of 21 Old 03-02-2011, 07:46 PM Thread Starter
Bthelton
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Little more progress.....ordered lift, and started everything for axle swap and working on fuel tank modifications
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post #11 of 21 Old 03-06-2011, 12:21 AM
predawn
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Quote:
Originally Posted by 75SV1 View Post
I am fairly certian you will need the fuel pump from the 2000. In '98, the Cherokees went to a returnless fuel pump. At least my '98 doesn't have a fuel filter. So it would be best to swap in the 2000 fuel pump. I do as PeteM suggest and look over at the ComancheClub or this build thread:
http://www.jeepforum.com/forum/f22/99-mj-build-881250/
I think the guy removed the pictures, though.
Tom
'97 might have been first year. Did my fuel pump a little while ago with bosch replacement, there was no return line, filter in the pump assy.
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post #12 of 21 Old 03-06-2011, 06:13 AM Thread Starter
Bthelton
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i have the fuel system figured out, Dakota fuel tank, Cherokee fuel system, my own filler neck. I plan on mounting today and will post more pics when i do!

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post #13 of 21 Old 03-07-2011, 05:20 AM
75SV1
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Quote:
Originally Posted by Bthelton View Post
i have the fuel system figured out, Dakota fuel tank, Cherokee fuel system, my own filler neck. I plan on mounting today and will post more pics when i do!

Please do, also maybe a write up. This might/should help me out. I have been trying to do a swap on my Comanche too. If the returnless Jeep fuel pump will fit in the Dakotas tank. And it will fit in the Comanche, that would solve a lot of problems. There was one buld were the guy fitted the returnless into the Comanche tank, but I don't think it could pickup fuel from the very bottom of the tank.
Tom
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post #14 of 21 Old 03-07-2011, 05:28 AM Thread Starter
Bthelton
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Mounted dakota tank in MJ, had to space it down a 1 1/2" to clear fuel regulator. Used a old t case drop i had laying around. Went to Lowes and bought 6ft of this strapping material and made longer straps to hold tank up. Goin to see about having a new skid plate built to protect the tank.


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post #15 of 21 Old 03-07-2011, 05:29 AM Thread Starter
Bthelton
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