jeep running too rich
#1
Newbie
Thread Starter
Join Date: Jul 2009
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L
jeep running too rich
My cherokee is running too rich. It'll run fine for a minute or two then starts to loose power and rev up without moving the peddle and continues in idle. The smell of it running rich is thick.
I'm running a 98' cherokee sport with a straight pipe and no other engine or fuel system mods.
Anyone have any ideas? Please help
I'm running a 98' cherokee sport with a straight pipe and no other engine or fuel system mods.
Anyone have any ideas? Please help
#2
CF Veteran
First, you need a cat in the system for proper back pressure. Your ECM is calibrated for that. Second, when was the last time you changed your O2 sensor?
#3
Newbie
Thread Starter
Join Date: Jul 2009
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L
i thought i should put one in, but when i posed the question my mechanic didn't think the cat was that necessary.
the o2 sensor that would be behind the cat if i had one was replaced about a yr ago. the other far as i know is the original.
the o2 sensor that would be behind the cat if i had one was replaced about a yr ago. the other far as i know is the original.
Last edited by xtreamt; 07-15-2009 at 12:30 AM.
#4
CF Veteran
If you don't have that cat, I imagine your ECM doesn't know what it is supposed to do. I would recommend you put one in and freshen up that sensor that would be in front of the cat.
#5
CF Veteran
Join Date: Jul 2009
Location: New Jersey
Posts: 2,522
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: l6 HO
i have a 95 xj that did something similar to that.. i changed the tps sensor just to checklist it.. and it came back that was the problem.. runs great now.. who knew..
Thread
Thread Starter
Forum
Replies
Last Post
investinwaffles
Modified XJ Cherokee Tech
11
05-18-2021 12:02 PM
Ye Ol' Cherokee
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
15
09-05-2015 04:36 PM
batman43
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
08-20-2015 08:43 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)