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Need help!!! 1989 yj

1K views 12 replies 5 participants last post by  Luckymac 
#1 ·
Hi everyone, my names Mike, I have a 1989 YJ, and im in the process of converting a 89 YJ W/ 2.5L to a 4.0L. before everyone dogs me for doing this swap, let me say this my dad gave me this jeep when I joined the Military it's been in my family since I was 9yrs old. And since uncle same doesn't pay much I'm doing it on a budget. I currently have
:

1. 94 XJ 4.0 completely assembled, starter to accessory drive w/ the computer and harness(cut at the firewall I don't need refer to #2)
2. 1994 YJ engine harness
3. 1993 YJ 4.0 fuel pump
4. AX15 with transmission rebuild (rebuilding myself)
5. NP231 w 23 spline input shaft to match the ax15
6. Newer ev6 fuel injectors(have to buy adapters for ev1 harness to ev6 injector)

7. I know I have to buy different water pump to the smaller fan clutch(not doing electric, gonna try and use my 2.5 fan and clutch assembly) also gonna purchase clutch flywheel trans mount? *have to move motor mounts forward?*

What am I looking at having to purchase. Where does the speed sensor for the fuel injection go since mine is mechanical and the 94 is electrical?

I didn't want to go small block chevy because I want to stay true to the jeep drivetrain.

Thank you again

If you can help thank you all sooo much :)
 
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#2 ·
Someone correct me if I'm wrong?
-But I thought I recalled reading that the motor mounts are different? So I don't think moving them is a fix?
-I'm also unsure if that rad will work?
-doesn't the CPS trigger FI's?
Sorry I'm not much help
 
#7 ·
I would like to know to (if a cherokee 4.0 will swap right into a wrangler 4.0 or 4.2? without moving frame mounts) If someone could quote me if you know the answer 100% :hijacked:
 
#13 ·
You state that you have a '93 fuel pump. Do you know if the '93 pump will drop into your '89 fuel tank? You may need to pick up a 1992 to 1995 fuel tank. Do you know if the '93 fuel pump is for a 15 or 20 gallon tank?

Your original plastic tank is probably 20 gallons. A '92 to '95 plastic tank will probably suit you better by doing the 15 to 20 Gal. mod and using a 20 gallon sending unit.

Good Luck, L.M.
 
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