Who wants more power out of their 87 or 88? - Page 5 - Jeep Cherokee Forum

Go Back  Jeep Cherokee Forum > Technical Discussion > MJ Comanche Tech. Stock & Modified.
Who wants more power out of their 87 or 88? >

Who wants more power out of their 87 or 88?

MJ Comanche Tech. Stock & Modified. MJ (86-92)
All discussion regarding the Jeep Comanche, the pickup truck related to the Cherokee platform.

Who wants more power out of their 87 or 88?

Old 05-04-2014, 11:58 PM
  #61  
CF Veteran
 
unidentifiedbomb's Avatar
 
Join Date: May 2011
Location: DE
Posts: 5,448
Year: 1988
Model: Cherokee
Engine: I6 4.0
Default

I'm guessing we should reset the ecu when we put it in?
unidentifiedbomb is offline  
Old 05-05-2014, 12:19 AM
  #62  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by unidentifiedbomb View Post
I'm guessing we should reset the ecu when we put it in?
Hell no!! They're not resetable. They're dumber than a box of rocks once the key is off. Plug N play. Go drive it and smile. Then after that, post up your happy findings.
cruiser54 is offline  
Old 05-07-2014, 03:42 PM
  #63  
CF Veteran
 
alpine.adrenaline's Avatar
 
Join Date: Aug 2009
Location: 9000 ft, CO
Posts: 1,075
Year: 1999 XJ
Model: Cherokee
Engine: I6 4.0L
Default

Curiosity has gotten the best of me and I'm off to the junkyard to see if this will work for the 4banger as well. With an '86 (TBI) I just need to find one older than '90, correct?
alpine.adrenaline is offline  
Old 05-07-2014, 04:05 PM
  #64  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by alpine.adrenaline View Post
Curiosity has gotten the best of me and I'm off to the junkyard to see if this will work for the 4banger as well. With an '86 (TBI) I just need to find one older than '90, correct?
Interesting. I'm not as familiar with the 4 bangers.

90 with throttle body injection?
cruiser54 is offline  
Old 05-13-2014, 08:44 PM
  #65  
CF Veteran
 
alpine.adrenaline's Avatar
 
Join Date: Aug 2009
Location: 9000 ft, CO
Posts: 1,075
Year: 1999 XJ
Model: Cherokee
Engine: I6 4.0L
Default

I pulled one from an '89 that I put in last night. Startup to a smooth idle is quicker and it idles better. Can't believe it worked. I'm interested to see the fuel savings in a few days. The '86 thru at least '89 had a single injector on top of the throttle body- not sure about '90.
alpine.adrenaline is offline  
Old 05-13-2014, 08:49 PM
  #66  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by alpine.adrenaline View Post
I pulled one from an '89 that I put in last night. Startup to a smooth idle is quicker and it idles better. Can't believe it worked. I'm interested to see the fuel savings in a few days. The '86 thru at least '89 had a single injector on top of the throttle body- not sure about '90.
You talking 4 cylinder?
cruiser54 is offline  
Old 05-13-2014, 10:55 PM
  #67  
Seasoned Member
 
87xj2's Avatar
 
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6
Default

Coulda swore it felt like my 89mj had more power then my 87mj but my ad said I was full crap. Guess I was right.so for my 87 what numbers do I look for in the upgraded one.manual 2wd metric ton.
87xj2 is offline  
Old 05-13-2014, 10:59 PM
  #68  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Get an ECU out of any 89 or 90 4.0 equipped XJ or MJ since you have a manual trans.
cruiser54 is offline  
Old 05-13-2014, 11:16 PM
  #69  
Seasoned Member
 
87xj2's Avatar
 
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6
Default

Any numbers to look for if I don't know the yr of the xj/mj.
87xj2 is offline  
Old 05-13-2014, 11:23 PM
  #70  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by 87xj2 View Post
Any numbers to look for if I don't know the yr of the xj/mj.
8953005428 or 8953005429 for sure.

Know how to decode a VIN?
cruiser54 is offline  
Old 05-13-2014, 11:29 PM
  #71  
Seasoned Member
 
87xj2's Avatar
 
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6
Default

Originally Posted by cruiser54 View Post
8953005428 or 8953005429 for sure.

Know how to decode a VIN?
Tried decoding my 87mj it came out right,then decoded my 89mj an it was way wrong said column shifter automatic,when it clearly was manual and interior was wrong also.
87xj2 is offline  
Old 05-13-2014, 11:31 PM
  #72  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by 87xj2 View Post
Tried decoding my 87mj it came out right,then decoded my 89mj an it was way wrong said column shifter automatic,when it clearly was manual and interior was wrong also.
Just for year!!

10th digit:

H-87
J-88
K-89
L-90
cruiser54 is offline  
Old 05-13-2014, 11:38 PM
  #73  
Seasoned Member
 
87xj2's Avatar
 
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6
Default

Originally Posted by cruiser54 View Post
Just for year!!

10th digit:

H-87
J-88
K-89
L-90
Whoop De dooo bazel.What does it all meeeeean......

Thanks buddy
87xj2 is offline  
Old 05-13-2014, 11:39 PM
  #74  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Originally Posted by 87xj2 View Post
Whoop De dooo bazel.What does it all meeeeean......

Thanks buddy
You bet.
cruiser54 is offline  
Old 05-14-2014, 09:14 AM
  #75  
::CF Moderator::
Thread Starter
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
Default

Update on my neighbor's 87.

Put the volvo injectors in.

0 280 155 746.

What a pleasant upgrade!!

Quicker starts, better throttle response and a bit better MPG. And mind you, we did this for safety reasons as the original injectors can split and spray fuel on your hot engine. This 87 already ran great with a late model eCU and TCU and we weren't expecting much improvement. Nice.....
cruiser54 is offline  

Thread Tools
Search this Thread
Quick Reply: Who wants more power out of their 87 or 88?


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: