Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.
Old Sep 21, 2015, 03:49 PM
How-Tos on this Topic
Last edit by: IB Advertising
See related guides and technical advice from our community experts:

Browse all: General Overview
Print Wikipost

XJ Ask the Question Thread

Thread Tools
 
Search this Thread
 
Old Feb 13, 2012 | 10:02 AM
  #9811  
darkfalcon9112's Avatar
CF Veteran
 
Joined: Oct 2009
Posts: 1,155
Likes: 0
From: Virginia Beach, VA
Year: 1991
Model: Cherokee
Engine: 4.0L H.O.
Default

Originally Posted by dukie564
the reason it went though the floor is because you reset the computer. That resets the factory Air/Fuel trim settings. The computer needs to relearn what are the proper settings for your truck now. It takes up to 50 start-up cycles for it to do this.

note that in this sense a start-up cycle = full engine warmup (usually about 20-30 minutes of driving).

So I just need to be patient and let it learn.... Hmmm sucks

It should get better though after it levels out right?

Thank you very much Dukie
Old Feb 13, 2012 | 10:17 AM
  #9812  
ol"blue's Avatar
CF Veteran
 
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Default

I wouldn't count on it. You installed a larger throttle body to allow more air into the engine, so that will need more fuel also to compensate.
Old Feb 13, 2012 | 10:20 AM
  #9813  
dukie564's Avatar
☠ CF Sheriff ☠
Premium Member
 
Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
Default

that's true also - dunno what size TB you installed
Old Feb 13, 2012 | 11:40 AM
  #9814  
darkfalcon9112's Avatar
CF Veteran
 
Joined: Oct 2009
Posts: 1,155
Likes: 0
From: Virginia Beach, VA
Year: 1991
Model: Cherokee
Engine: 4.0L H.O.
Default

Originally Posted by ol"blue
I wouldn't count on it. You installed a larger throttle body to allow more air into the engine, so that will need more fuel also to compensate.
Ahh that makes sense. Hmmmmmm

Originally Posted by dukie564
that's true also - dunno what size TB you installed
60mm thanks for the info.
Old Feb 13, 2012 | 11:53 AM
  #9815  
dukie564's Avatar
☠ CF Sheriff ☠
Premium Member
 
Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
Default

Originally Posted by darkfalcon9112
Ahh that makes sense. Hmmmmmm



60mm thanks for the info.
oh you'll be fine then
Old Feb 13, 2012 | 12:14 PM
  #9816  
darkfalcon9112's Avatar
CF Veteran
 
Joined: Oct 2009
Posts: 1,155
Likes: 0
From: Virginia Beach, VA
Year: 1991
Model: Cherokee
Engine: 4.0L H.O.
Default

Originally Posted by dukie564
oh you'll be fine then

Yeah its not too crazy. I do have upgraded injectors too I forget what poundage though. I am also missing the insides of my Cat..
Old Feb 13, 2012 | 02:01 PM
  #9817  
97XJgirl's Avatar
Newbie
 
Joined: Feb 2012
Posts: 16
Likes: 0
From: Maine
Year: 1997
Model: Cherokee
Engine: 4.0 HO
Default

Originally Posted by PopsMcGee70
Are you running it in 4 wheel on dry pavement? 4H part time is for loose and slippery surfaces only.
No, I have it in only 2wd on the road cuz the roads arent bad. At first I thought it might be my 4wd but its not cuz I just replaced it a few months ago... so I'm thinkin possibly my u-joints?
Old Feb 13, 2012 | 06:33 PM
  #9818  
89XJDan's Avatar
Seasoned Member
 
Joined: Jul 2011
Posts: 413
Likes: 0
From: Murray, UT
Year: 1999
Model: Cherokee
Engine: 4.0 I6
Default

Over the past few weeks, my lights have been too dim for comfort because the voltage has been low. Not so low that it's harmful to the battery, but low enough to be annoying. It seems to sit around 12 volts instead of up by 14, like I feel it should be. I work at Batteries Plus and have the ability to check my charging system, but that has brought up no red flags. So my question is: where do I start? It's an 89, I know it's all old, but the previous owner claimed it was a newer, lower mileage motor, so one would assume that the alternator would be newer as well. So do I start/go straight to the ECU(voltage regulator)? Or start with the alternator anyway? The more I work on it, the less I begin to think of the shop that did the swap. I want the proper solution, and I want my headlights to actually serve their function again.
Old Feb 13, 2012 | 06:51 PM
  #9819  
DaddyCat's Avatar
Senior Member
 
Joined: Jan 2011
Posts: 801
Likes: 1
From: N. IL
Year: 2000
Model: Cherokee
Engine: 4.0
Default

Originally Posted by 89XJDan
Over the past few weeks, my lights have been too dim for comfort because the voltage has been low. Not so low that it's harmful to the battery, but low enough to be annoying. It seems to sit around 12 volts instead of up by 14, like I feel it should be. I work at Batteries Plus and have the ability to check my charging system, but that has brought up no red flags. So my question is: where do I start? It's an 89, I know it's all old, but the previous owner claimed it was a newer, lower mileage motor, so one would assume that the alternator would be newer as well. So do I start/go straight to the ECU(voltage regulator)? Or start with the alternator anyway? The more I work on it, the less I begin to think of the shop that did the swap. I want the proper solution, and I want my headlights to actually serve their function again.
I'll quote tjwalker "refresh your grounds" there are several that may be not be making good contact.
Old Feb 13, 2012 | 06:52 PM
  #9820  
blueflash's Avatar
Newbie
 
Joined: Feb 2012
Posts: 9
Likes: 0
From: Ontario, Canada
Model: Cherokee
Default

Noob question, for a guy looking for a cherokee for a daily driver, and minor mods for light wheeling :

How common is the dana 35 ( with or without abs ) ? I know that a 8.25 is the better rear end, but are they hard to find in a factory original 97-01 cherokee, because most newer cherokee's have abs brakes ?

I plan on giving my cherokee a 3 inch lift, and 30's or 31's..... Will a dana 35 handle that ? If I can't find myself a xj with a 8.25.

If a dana 35 cant handle a 3" lift with 31's, then I will make sure that I strictly look for a cherokee with a 8.25 rear end....but if a D35 can handle it, then I won't worry if I get a cherokee with it.
Old Feb 13, 2012 | 07:00 PM
  #9821  
SUPERYAN333's Avatar
Junior Member
 
Joined: Jan 2012
Posts: 33
Likes: 0
From: Pennsylvania
Year: 1999
Model: Cherokee
Engine: 4.0
Default

Originally Posted by blueflash
Noob question, for a guy looking for a cherokee for a daily driver, and minor mods for light wheeling :

How common is the dana 35 ( with or without abs ) ? I know that a 8.25 is the better rear end, but are they hard to find in a factory original 97-01 cherokee, because most newer cherokee's have abs brakes ?

I plan on giving my cherokee a 3 inch lift, and 30's or 31's..... Will a dana 35 handle that ? If I can't find myself a xj with a 8.25.

If a dana 35 cant handle a 3" lift with 31's, then I will make sure that I strictly look for a cherokee with a 8.25 rear end....but if a D35 can handle it, then I won't worry if I get a cherokee with it.
IMO the 8.25" is more common in 97-01; I would hold out until you find one
Old Feb 13, 2012 | 07:11 PM
  #9822  
salad's Avatar
Herp Derp Jerp
Premium Member
 
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Default

Originally Posted by SUPERYAN333
IMO the 8.25" is more common in 97-01; I would hold out until you find one
+1. 97+ XJs without ABS practically guaranteed to have a 29-spline 8.25.

However, a D35 will be fine turning 30" or 31" rubbers with light wheeling. It's when you get larger tires, steel rims, in there that stuff starts to break. If you wanted to run 33s or 35s on some Soft 8s with a lunchbox locker I'd say stay away. But if this is more a "go screw around in the woods" weekend warrior you shouldn't see an issue. Remember to always bring spares!
Old Feb 13, 2012 | 09:32 PM
  #9823  
onlyinajeep726's Avatar
CF Veteran
 
Joined: Apr 2011
Posts: 1,146
Likes: 0
From: Clayton, NC
Year: 1988
Model: Cherokee
Engine: 4.6L I6 Stroker with port matched +99 intake and 62mm TB
Default

I'm going to be swapping axles soon and while I'm at it, replacing the differential/gear oil.

What do you put in there to replace the old gear oil? Any good aftermarket oil?
Old Feb 13, 2012 | 09:37 PM
  #9824  
Bohnett's Avatar
Seasoned Member
 
Joined: Aug 2010
Posts: 390
Likes: 0
From: Ashburn, VA
Year: 2000
Model: Cherokee
Engine: 4.0
Default

Originally Posted by onlyinajeep726
I'm going to be swapping axles soon and while I'm at it, replacing the differential/gear oil.

What do you put in there to replace the old gear oil? Any good aftermarket oil?
Purple gear oil, can't go wrong.
Old Feb 13, 2012 | 10:21 PM
  #9825  
89XJDan's Avatar
Seasoned Member
 
Joined: Jul 2011
Posts: 413
Likes: 0
From: Murray, UT
Year: 1999
Model: Cherokee
Engine: 4.0 I6
Default

Originally Posted by DaddyCat
I'll quote tjwalker "refresh your grounds" there are several that may be not be making good contact.
Might be a dumb question, but I like to be sure before I commit some of the little free time I get off from work.

Check the battery ground, and then follow the bulb ground to wherever it may ground to the frame, and clean that up? Or is it simpler even than that?



All times are GMT -5. The time now is 04:24 PM.