4.0l xj 97 motor into yj 87 - Page 17 - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > 4.0l xj 97 motor into yj 87

Ruffstuff 10 year saleBDS 4-1/2" Suspension Lift Kit - Jeep Wrangler YJRough Country Lift Kits and Parts!

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Unread 11-10-2013, 09:19 AM   #241
fishadventure
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1991 YJ Wrangler 
 
Join Date: Jul 2013
Location: Morrisville, VT
Posts: 2,184
Quote:
Originally Posted by lbsickboy View Post
...also if you have a chance get a obd2 reader so you can read the codes before you place it into the yj...
I am doing this project at my friend's house. He has a two-bay garage with a lift, big compressor, plug-ins for my welder, complete with lights and heat, etc., which is nice. What is just as nice is that when he is not at home he is a pro mechanic and has the Snap-On box that tells everything

Going to try this afternoon to make the XJ run under its own power and then look at any codes. Supposedly when it was parked two years back it ran fine but had rusted out to much to pass Vermont state safety inspection, so I don't anticipate any issues. But it will be very good to have a baseline.

Thanks

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Unread 11-10-2013, 02:39 PM   #242
louieberner
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1993 YJ Wrangler 
 
Join Date: Jan 2008
Location: gaylord michigan
Posts: 29
Eletric Diagrams

I put a 4.0 from a 99 into my 93. Here's the electrical changes cross referenced 93-99. It is an OBD-2 swap. Sorry I can't help much with translating, the swap was made by my son-in-law and he wrote the diagrams. Nice to have an Electrical Engineer in the family.
File Type: pdf Engine 1.pdf (26.2 KB, 69 views)
File Type: pdf Engine 2.pdf (31.1 KB, 61 views)
File Type: pdf PCM.pdf (12.4 KB, 56 views)
File Type: pdf Jeep Wiring.pdf (40.4 KB, 40 views)
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Unread 11-11-2013, 08:08 AM   #243
fishadventure
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1991 YJ Wrangler 
 
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Location: Morrisville, VT
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@louieberner - Thanks! I printed these to add to my three-ring I am creating. I might be able to get it running but I don't want to reinvent the wheel every time a sensor goes bad or something needs service LOL. My own manual of sorts!
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Unread 01-24-2014, 11:00 AM   #244
lbsickboy
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1986 YJ Wrangler 
 
Join Date: Aug 2011
Location: Den Haag, zuid holland
Posts: 193
Hi all thought i would update my thread.
all is well jeep runs god no problems as of yet, only thing i had to do to get the best out of the AW4 which i wanted to do from day one, was getting my hands on a front and rear 4,10 ring pinion or complete axles with the 4,10 gears.
originally i had the tf999 tranny which came with the 3,07 gears which is terrible for the AW4.
So now have the 4,10 gears all installed and what a difference they certainly make as a daily driver.
this march i ll be going off road for the first time with this set up, so looking forward to that.

ill try to get a video up.
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http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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Unread 01-24-2014, 11:05 AM   #245
lbsickboy
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Quote:
Originally Posted by fishadventure View Post
@louieberner - Thanks! I printed these to add to my three-ring I am creating. I might be able to get it running but I don't want to reinvent the wheel every time a sensor goes bad or something needs service LOL. My own manual of sorts!
hows it going did you manage to get it running ??
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http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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Unread 01-24-2014, 05:14 PM   #246
fishadventure
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by lbsickboy View Post
hows it going did you manage to get it running ??
Wow - caught the subject line in the "new posts" and I recognized the thread as one I was going to use for reference..... Didn't remember posting

Yes- the XJ runs GREAT and everything works. Good stuff and feel so fortunate to have picked up the rusted out XJ!

Haven't pulled the XJ's 4.0 yet though as I am working on a frame I bought for the project. I got the 258ci/4.2l apart for the donor crank (I wanted the 12-counterweight crank for my stroker build). Basically doing everything I can with my "loose parts" since it is too cold here to do the "outside work" necessary before the rebuild can be brought inside where it's warm.

I *do* have a 1993 4.0 out of a junk wrangler which I am probably going to strip and prep. That way I can have it hot-tanked, bored, etc. and have a short block assembled and ready without having to deal with the '98 XJ until it's warmer. I am pretty sure the blocks are the same- but I will use the 98 head and cam, intake/injectors etc.

I also bought an unused rebuilt 4-counterweight 4.2 crank still in its shipping box - complete with bearings. I picked up a basically stock '89 YJ with a 4 cyl to drive for the winter I thought I would put the 4.2 in it this summer because I am not thrilled with the 2.5's HP. I have enough "spare" AX15s and such from all my trades that it really won't need any parts purchases. So why not? Plus- letting that ol' 1978 AMC 258 a have a second life gives me warm fuzzies. Yes, I am sick...

Thanks for asking and thanks for all the great info in your thread. There's a lot of stuff that here that has helped me in my planning and collecting for the project jeep!
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Unread 04-08-2015, 11:45 PM   #247
Steves1990
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Very cool
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Unread 10-25-2015, 12:09 PM   #248
lbsickboy
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Back again lol

Well after a time with the obd2 working fine and dandy disatser struck.
I went off to Luxembourg in March for a weekend with the kids all went well until, my son asked if we could drive threw the water trail, ok I didn't want to at the time but is face couldn't resist it lol,
so off we went in to the water and then it happened yup, the jeep got bogged down and not thinking about it while the motor was still running I realized I forgot to turn my open air filter around towards the bulk head, to late the fan was throwing the water up into the airfliter and one thing lead to another screwed my block up.

So Had to get another block all setup and done job but the thing wil not start anymore.
Know one over here didn't want to toch it lol they said it was the computer. So managed to get a pcm from a running xj with out a security system imbedded
That didn't solve it so it has to be in the wiring system so that's on its way.
Now I can start all over again with another wiering harnes

I so glad I had this thread to fall back on
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http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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Unread 10-26-2015, 07:12 PM   #249
fishadventure
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I am recalling reading about the cps not liking water very much. Have you done the code routine?
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Unread 10-27-2015, 01:59 PM   #250
lbsickboy
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Quote:
Originally Posted by fishadventure View Post
I am recalling reading about the cps not liking water very much. Have you done the code routine?

I changed all the sensors that could be changed an no fun checked all the ground wires cleaned and reconnected,but no joy so wire harness has been pulled and laying on the floor in my house waiting to be gutted lol
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http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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Unread 10-28-2015, 07:35 AM   #251
fishadventure
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by lbsickboy
I changed all the sensors that could be changed an no fun checked all the ground wires cleaned and reconnected,but no joy so wire harness has been pulled and laying on the floor in my house waiting to be gutted lol
that's sorta why I don't wanna obdII my '89. Can it be Done? Sure. But I don't wanna.
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Unread 10-28-2015, 08:10 AM   #252
Que89YJ
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1989 YJ Wrangler 
 
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Obd 2 is much better than obd 1 in diagnostics. I don't know why water would be an issue other than no dielectric grease on the connections. Especially if you had a working setup. I wish you would've posted before ripping it out.
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