High Output 4.0 - JeepForum.com

LinkBack Thread Tools
post #1 of 7 Old 11-13-2004, 06:49 PM Thread Starter
Registered User
Join Date: Jun 2004
Location: Mississippi
Posts: 4
High Output 4.0

I have just purchased a 2000 Jeep Cherokee Sport with a 4.0. It is a nice vehicle with a great package. I have a 96 Jeep Cherokee with a 4.0 “High Output”. There is a noticeable difference in the power of the 2 vehicles. What is the difference in the two engines? What makes the high output engine have more power? Can I change a chip or card in the computer to make the regular engine a High Output version? What would I need to do to convert the regular 4.0 engine to make it equivalent to the High Output engine?

XYKJohn is offline  
Sponsored Links
post #2 of 7 Old 11-13-2004, 08:24 PM
The Post man
EricsXJ's Avatar
2000 XJ Cherokee 
Join Date: Apr 2001
Location: Reno, Nevada
Posts: 8,592
Your 4.0L in the 2000 is a High Output also they just dropped the name.

From the specs sticky:
4.0L I6 EFI "Power Tech" - 177 hp @ 4750 rpm, 220 ft lb @ 4000 rpm - used 87-90
4.0L I6 MPI "Power Tech HO" (High Output) - 190 hp @ 4750 rpm, 220 ft lb @ 4,000 rpm - used in 91-95 and updated in 96-01 to 225 ft lb torque @ 3000 rpm (00-01 models use a distributorless ignition system)

I can't tell you why your older jeep seems like it has more power.

2000 XJ "PROJECT RUBICON" 3-link front / 4-link rear / coilovers / running 37's on Dana 60s
My website - EricsXJ.com

EricsXJ is offline  
post #3 of 7 Old 11-13-2004, 08:59 PM
Registered User
madrabbitt's Avatar
Join Date: Feb 2004
Location: Albuquerque
Posts: 8,821
change the oil and airfilter in the new one.
see what that does.

and maybe if it needs a little more motivation,

you can get a high output sticker for it


Installing HID's in stock housings is bad. Here is why.

"When you see someone who needs help, help them. When you see someone who needs a hug, hug them... Help those who can't help themselves." -Sgt Andrew Tingwall, NMSP. End of watch 6-10-2009
madrabbitt is offline  
post #4 of 7 Old 11-13-2004, 10:11 PM
Little Red Menace
balloo93's Avatar
1993 XJ Cherokee 
Join Date: Aug 2002
Location: Austin, TX
Posts: 20,820
The difference could be gears. There could be minor differences in tire size and weight (97+ metal hatches 84-96 fiberglass).

93 Sport
Beer is proof that God loves us and wants us to be happy............Ben Franklin

Specs in Profile.

balloo93 is offline  
post #5 of 7 Old 11-13-2004, 10:17 PM
Redefining body roll
Blake's Avatar
1996 XJ Cherokee 
Join Date: Aug 2004
Location: Spring Hill, TN
Posts: 3,840
Originally Posted by madrabbitt
and maybe if it needs a little more motivation,
you can get a high output sticker for it

I bet the yeller' one would get it up to speed.

1991 Lexus LS400
Daily Beater

2006 Ford F250 Larait
6.0 Powerstroke | 4x4 | Crew Cab


Blake is offline  
post #6 of 7 Old 11-13-2004, 11:19 PM
Registered User
Join Date: Sep 2004
Location: NJ Exits 168, 105, 77 take your pick
Posts: 694
yeah i hear that those stickers add somehwere in the range of 10 - 12 hp to your engine

2000 XJ 4.0 aw4 np 242
Bastard 2.5" Lift
30" Kumho MT's
Belly Armor
RE H&T w/ front shaft
Lagooz00XJ is offline  
post #7 of 7 Old 11-14-2004, 01:42 PM
Registered User
Trippe's Avatar
1997 XJ Cherokee 
Join Date: Oct 2004
Location: Tampa: When Hell is just not hot enough for you!
Posts: 995
i've got a bumper sticker that says "save the whales for later" and has a picture of a knife and fork...i got about 5 hp out of that alone..

1997 Green XJ 2 door
Parrothead Jeeper Union Member #1
Trippe is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
4.0 high output vs. 4.0 santosdv XJ Cherokee Technical Forum 13 09-09-2008 07:29 PM
high output? txjeep103 XJ Cherokee Technical Forum 14 11-22-2006 02:59 PM
High Output? rosader XJ Cherokee Technical Forum 2 10-04-2006 08:15 AM
High Output TB sw19 XJ Cherokee Technical Forum 4 11-18-2005 05:14 PM
High Output MoodyXJ XJ Cherokee Technical Forum 5 06-05-2003 02:34 PM

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 On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome