1992 YJ 2.5L engine swap headaches! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-08-2010, 10:52 PM   #1
Newb
 
Join Date: Sep 2010
Posts: 3
1992 YJ 2.5L engine swap headaches!


HELP!
I just replaced my runnung 1992 Jeep YJ 2.5L engine with a 1997 TJ 2.5L. Everything swapped OK and plugged right in however I used the sensors, ignition, distrib, injectors, and computer from the 1992 knowing they all worked.
I have now been messing with this thing for 4+ weeks and can not get it to run! I have checked the sensors, and tried 2 other '92 computers without it running on it's own.
Fuel & fire turn on, but just for a split second after the key is turned on, then both the fuel pump and the ignition shut down. We tried jumping wires and got the pump to run but no luck with fire.
Seems something is telling the computer to shut down and by doing so the auto shutdown relay and the fuel pump relay circuits turn off. Is the engine internal timing and valve opening different between a '92 and a '97 2.5L?

We have already removed all the hair on top of our heads and am almost ready to pull out all with the new fangled electronics and steal the 327 engine out of my neighbor's '66 chevy and put it in this YJ. I will GREATLY appreciate any assistance that would help get this Jeep running, ........ and save face with the neighbor.

dinoking is offline   Quote Quick Reply
Old 09-08-2010, 10:55 PM   #2
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,334
Ummmm did you use the flywheel off the 92 or the 97?

Ibuildembig is online now   Quote Quick Reply
Old 09-08-2010, 11:32 PM   #3
Jeeper
 
Kohrs93's Avatar
 
Join Date: Apr 2010
Location: Moline, IL
Posts: 594
Can't help ya with the engine... but if your gonna do a swap for 2.5L why not go bigger than another 2.5L?
__________________
92 2.5L 5 speed - 3" RC lift - Skyjacker Steering Stabilizer - 17" XD HOSS wheels - 315/70r17 BFG All-terrain T/A
Kohrs93 is offline   Quote Quick Reply
Old 09-09-2010, 05:37 AM   #4
Jeeper
 
crtaylor's Avatar
 
Join Date: Sep 2009
Location: Beaver Falls,PA
Posts: 1,055
Quote:
Originally Posted by Ibuildembig View Post
Ummmm did you use the flywheel off the 92 or the 97?
x2 did this in a 95 and I did change fly wheel, they have different timing marks on them.atleast they looked different
crtaylor is offline   Quote Quick Reply
Old 09-09-2010, 09:18 AM   #5
Newb
 
Join Date: Sep 2010
Posts: 3
I used the 1992 flywheel however I did not see any differences.
Still stumped... Thanks!
dinoking is offline   Quote Quick Reply
Old 09-09-2010, 09:18 AM   #6
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,334
Yup, I made that mistake putting an 89 motor in a 94....had to pull it back apart and put in the 94 flywheel
Ibuildembig is online now   Quote Quick Reply
Old 09-09-2010, 09:56 AM   #7
alf
Newb
 
Join Date: Sep 2010
Posts: 2
When you removed the original engine did you remove the crank sensor from the bell housing? if not you may have damaged it during the installation of the other engine.
If you are loosing ASD relay during cranking check the quality of the power and ground connections. Did you clean the block where the grounds go on the lower passengers side of the engine.? Measure the supply circuit at the Tps to make sure you have sensor supply voltage. if you don't you may have a sensor or wiring shorting the supply circuit. These are a few items that could cause your issue
alf is offline   Quote Quick Reply
Old 09-09-2010, 10:09 PM   #8
Newb
 
Join Date: Sep 2010
Posts: 3
Thanks for the help so far..
When we removed the engine we were careful not to damage the CPS sensor. Then when it wouldn't start we replaced the CPS sensor to make sure.
We did strip down the outside of the replacement engine of grease & dirt and did recheck all the ground wires that were loosened. We also checked the engine wiring harness and sensors for shorts or grounds and came across nothing out of spec.
Unfortunately still not running...
Any other comments on the flywheel? Even though they look the same, is there a difference between the 92 & 97? Again we used all the 92s electronics.
dinoking is offline   Quote Quick Reply
Old 09-15-2010, 06:55 AM   #9
Newb
 
Join Date: Apr 2007
Posts: 10
Use 97 flywheel and 97 computer.

snb73 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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.



Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Swap 90cheroeke 4.0 Auto Into 94 Wragler 4.0 Manual rich solberg TJ General Discussion Forum 8 06-14-2011 07:56 AM
4 Cyl. to 8 Cyl. Engine Swap WhiteJeep93 YJ Tech Forum 43 08-21-2010 05:40 AM
engine swap mud707 CJ Tech Forum 10 02-01-2007 05:19 PM
2.5L to 4.0L Engine Swap DustyJeep YJ Tech Forum 2 01-09-2007 04:44 PM
Engine Swap or conversion JLGray YJ Tech Forum 8 04-16-2006 01:12 PM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 11:26 AM.



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