09-21-2015, 03:49 PM
Last edit by: IB Advertising
See related guides and technical advice from our community experts:
Browse all: General Overview
- Jeep Grand Cherokee WJ 1999 to 2004 Crash Test and Safety Ratings
Important Information to help you understand your Jeep Grand Cherokee.
Browse all: General Overview
XJ Ask the Question Thread
05-20-2014, 09:00 PM
Senior Member
Join Date: Jan 2011
Location: Joliet, Il
Posts: 730
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
Sorry for the confusion! And thanks for the help!
05-20-2014, 09:02 PM
CF Veteran
Join Date: May 2011
Location: Glendale,Az
Posts: 1,458
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Like Wonderboy said it sounds like your temp sensor is wacky. The electric fan shouldn't come on until 218-ish and should shut off around 213-ish...
Have you changed transmission fluid and adjusted the throttle valve cable? https://www.cherokeeforum.com/f2/free-quick-fix-41821/
05-21-2014, 06:36 AM
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
Posts: 19,216
Likes: 0
Received 40 Likes
on
36 Posts
Year: 1999
Engine: 4.0
So I did the head gasket with a new head. I fired it up for the first time yesterday and everything is going good. Smooth idling and no leaks. Temperature stay at 195. Nothing out of ordinary, so I decided to check the gauges and noticed that it idled at 600 rpms.
I'm stumped. Usually in my experience, when engines idle at 700 or less, it usually run rough.
Throttle body was deep cleaned and the idle air sensor works perfectly on other jeep.
Is it weird to idle perfectly at 600 rpms?
I'm stumped. Usually in my experience, when engines idle at 700 or less, it usually run rough.
Throttle body was deep cleaned and the idle air sensor works perfectly on other jeep.
Is it weird to idle perfectly at 600 rpms?
05-21-2014, 06:53 AM
CF Veteran
Join Date: Sep 2012
Location: grove city OHIO
Posts: 1,169
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1999
Model: Cherokee
Engine: 4.0 HO
So I did the head gasket with a new head. I fired it up for the first time yesterday and everything is going good. Smooth idling and no leaks. Temperature stay at 195. Nothing out of ordinary, so I decided to check the gauges and noticed that it idled at 600 rpms.
I'm stumped. Usually in my experience, when engines idle at 700 or less, it usually run rough.
Throttle body was deep cleaned and the idle air sensor works perfectly on other jeep.
Is it weird to idle perfectly at 600 rpms?
I'm stumped. Usually in my experience, when engines idle at 700 or less, it usually run rough.
Throttle body was deep cleaned and the idle air sensor works perfectly on other jeep.
Is it weird to idle perfectly at 600 rpms?
05-21-2014, 07:11 AM
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
Posts: 19,216
Likes: 0
Received 40 Likes
on
36 Posts
Year: 1999
Engine: 4.0
05-21-2014, 07:26 AM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
05-21-2014, 07:28 AM
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
Posts: 19,216
Likes: 0
Received 40 Likes
on
36 Posts
Year: 1999
Engine: 4.0
05-21-2014, 07:31 AM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Well then, that new fangled OBD-II stuff probably has to relearn stuff, like idle speed etc after a few running cycles.
If it were a Renix, it would be dumb and happy, and idle just like before not knowing the difference....
05-21-2014, 07:36 AM
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
Posts: 19,216
Likes: 0
Received 40 Likes
on
36 Posts
Year: 1999
Engine: 4.0
lol. Well I started it up few times in the 2 hours I had it running and it would start up to 750 rpms then settle down at 600 on couple of minutes.
05-21-2014, 10:13 AM
Senior Member
Join Date: Apr 2012
Location: Huntsville, Tn
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
Year: Different Years (I have several XJ's)
Model: Cherokee
Engine: 4.0 HO
What types of mods do I have to do to be able to use a 99 fuel rail on a 95? I'm attempting to delete the fpr. To clarify I race my XJ and I'm converting to a fuel cell and adding a high pressure in line fuel pump. My goal is to keep as much fuel pressure as possible even at wot.
05-21-2014, 11:50 AM
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
Posts: 18,251
Likes: 0
Received 13 Likes
on
12 Posts
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Swap to a '97+ setup or go custom. The entire fuel system needs to be changed - different pump and different operating pressures throughout. With the new PCM you'll need some new sensors as well.
Why do you want to eliminate the FPR? Plenty of applications use the vacuum FPR with monstrous injectors.
Why do you want to eliminate the FPR? Plenty of applications use the vacuum FPR with monstrous injectors.
05-21-2014, 12:46 PM
Senior Member
Join Date: Apr 2012
Location: Huntsville, Tn
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
Year: Different Years (I have several XJ's)
Model: Cherokee
Engine: 4.0 HO
Swap to a '97+ setup or go custom. The entire fuel system needs to be changed - different pump and different operating pressures throughout. With the new PCM you'll need some new sensors as well. Why do you want to eliminate the FPR? Plenty of applications use the vacuum FPR with monstrous injectors.
Last edited by LawDog9; 05-21-2014 at 12:49 PM.
05-21-2014, 01:13 PM
CF Veteran
Join Date: Apr 2011
Location: Indianapolis
Posts: 4,825
Likes: 0
Received 2 Likes
on
2 Posts
Year: '99 and '91
Model: Cherokee
I previously thought the parts jeep I had was a 95, but it has seat brackets that are like my 99, so wouldn't it be a 96? (The parts jeep that is)
If its a 96 would the 8.25 in it be 29 spline? If so I'm gonna bolt that in my 91 that has a d35.
Edit: never mind some googling told me that 96 is a split year so it could have either. Guess I might pull an axle shaft put and count the splines maybe I'll get lucky and it'll have a posi in there lol.
If its a 96 would the 8.25 in it be 29 spline? If so I'm gonna bolt that in my 91 that has a d35.
Edit: never mind some googling told me that 96 is a split year so it could have either. Guess I might pull an axle shaft put and count the splines maybe I'll get lucky and it'll have a posi in there lol.
Last edited by DieselD; 05-21-2014 at 01:18 PM.
05-21-2014, 01:30 PM
CF Veteran
Join Date: Aug 2011
Location: San Jose
Posts: 1,994
Likes: 0
Received 7 Likes
on
7 Posts
Year: 89
Model: Cherokee
Engine: 4.0 I6
I previously thought the parts jeep I had was a 95, but it has seat brackets that are like my 99, so wouldn't it be a 96? (The parts jeep that is)
If its a 96 would the 8.25 in it be 29 spline? If so I'm gonna bolt that in my 91 that has a d35.
Edit: never mind some googling told me that 96 is a split year so it could have either. Guess I might pull an axle shaft put and count the splines maybe I'll get lucky and it'll have a posi in there lol.
If its a 96 would the 8.25 in it be 29 spline? If so I'm gonna bolt that in my 91 that has a d35.
Edit: never mind some googling told me that 96 is a split year so it could have either. Guess I might pull an axle shaft put and count the splines maybe I'll get lucky and it'll have a posi in there lol.