It is currently Thu Aug 16, 2018 7:30 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Performance upgrade suggestions for the 4.0L
PostPosted: Tue Feb 21, 2012 4:40 pm 
Offline
LOST Member

Joined: Sat Jul 10, 2010 7:38 pm
Posts: 174
Location: The Dalles, OR.
My wife has a 99' Limited that seems terribly gutless. Was wondering if ya'll have any suggestions of improving performance and fuel economy?

Thanks!

_________________
GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler!


Top
 Profile  
 
 Post subject: Re: Performance upgrade suggestions for the 4.0L
PostPosted: Tue Feb 21, 2012 10:57 pm 
Offline
LOST Addict
User avatar

Joined: Thu Oct 29, 2009 5:59 pm
Posts: 2132
Location: Navarre FL
free flowing intake and exhaust systems obviously helps power. a lot of people change out fuel injectors for dodge neon injectors and o2 sensors for increase in fuel economy.

idk how people think the 4.0l is gutless. my cherokee is on stock 3.55 gears and 33" tires feels like it has more power then my liberty with 4.10s and 32". the only difference is the cherokee shifts all the time on the highway.


Top
 Profile  
 
 Post subject: Re: Performance upgrade suggestions for the 4.0L
PostPosted: Wed Feb 22, 2012 12:31 am 
Offline
Lifetime Member
Lifetime Member
User avatar

Joined: Sat Jan 06, 2007 1:54 am
Posts: 5818
Location: 7,000 feet, Zuni Mountains, New Mexico
DieselJeepLuvr wrote:
My wife has a 99' Limited that seems terribly gutless. Was wondering if ya'll have any suggestions of improving performance and fuel economy?


I would need more information. Is it lifted? What year is it? What size of tires? I agree with DirtyKK, the 4.0L is far from gutless. Either you have something wrong (plugged catalytic converter) or something electronically/mechanically not right.

_________________
2015 Ram Ecodiesel/Big Horn/4x4/Quad Cab
2016 Arctic Fox 22G/Onboard 2500 LP Cummins Onan Generator/160 Watt Solar Panel

I took the road less traveled. Now I'm LOST.


Top
 Profile  
 
 Post subject: Re: Performance upgrade suggestions for the 4.0L
PostPosted: Wed Feb 22, 2012 8:15 am 
Offline
LOST Member
User avatar

Joined: Mon Jun 28, 2010 8:51 am
Posts: 268
Happen to check out a tuner? Looks like some pretty respectable gains. 28 HP @ 4,850 and 33 TQ @ 3,900rpm. I think they are usually around $350 shipped. Check it out!

https://www.superchips.com/Store/tabid/108/ctl/product/mid/687/ProductId/100/product/Jeep_Flashpaq/Default.aspx

_________________
2003 Jeep Liberty Freedom Edition
3.7L 5 speed manual
OME 927/948 w/Bilsteins
245/75/16 Goodyear Duratracs


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group. Color scheme by ColorizeIt!
Logo by pixeldecals.com