Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum > need info on a 1990 wrangler

Join Wrangler Forum Today

Thread: need info on a 1990 wrangler Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
06-06-2006 03:14 AM
chim I just did the opposite. Bought a 95 with a blown 4 banger, and replaced it with a 2.5 from a 90.

Moved from old engine to new:
All sensors
Intake & FI
Water Pump (actually bought new - cheap insurance)
Flywheel (bought new pilot/clutch/pressure plate/TO bearing)

The 95 had MPI and the 90 TBI as has been said.

The distributor from the 95 had a four-wire tail coming out of it, but the 90 didn't.

There were places for the sensors, and some appeared to be different, so to play it safe I swapped them.

The 95 was set up for a serpentine belt, so I had to use the harmonic balancer from the 95 to drive accessories. Note that the water pumps rotate in different directions between the two. The HB had to be driven back farther onto the end of the crank to make it line up with the other pulleys. It almost has to rub the timing chain cover.

The flywheel form the 95 had 4 notches on opposite sides, but the 90 had perhaps twice that number. I swapped that because I was concerned about "confusing" the computer when the crank sensor started counting them.

With those changes, it was a direct swap. I'd assume going the opposite way would work as well. No wiring changes were needed................chim
06-05-2006 06:14 PM
1BLKJP Nice, I knew some of you YJ boys would pipe up in here.
06-05-2006 06:13 PM
Hackle WB is correct you will need a new harness if you did not get it with the 95 motor and a computer.
06-05-2006 05:59 PM
whitebuffalo 90 2.5L is fuel injected but its its TBI and the 95s were MPFI i beleive. would be different computer and electronics. i would think ud need a new wiring harness and the comp, other than that, it oughta drop right in
06-05-2006 04:46 PM
1BLKJP The only differnce might be the difference between the Carborated and Fuel Injected. I believe your 90 would've been carb'd and the 95 should be FI.
06-02-2006 12:15 PM
bluvikng If you are having to put in a motor, why not put a larger one in? Say a I-6, or V-6, or V-8. Or do you want to keep everything original? I would think the 95 motor would plug in just fine.
06-01-2006 11:35 PM
need info on a 1990 wrangler

i just purchased a 1990 wrangler with a 2.5 that doesnt have a motor in it would a 1995 2.5 motor need any additional wiring or should it bolt and plug right in

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 06:08 AM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC