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
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Yes check battery terminals. I can't remember if you've tested your TPS before. The alternators don't make much power at very low RPM so a dip in voltage is normal. Your PCM uses all four O2 sensors for setting fuel trim by the way, not just the upstreams. Replace them whenever. But to me it just sounds like your idle is shat. If TPS tests good replace the IAC.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Senior Member
Joined: Feb 2014
Posts: 854
Likes: 1
From: Minnesota
Year: 1996
Model: Cherokee
Engine: 4.0
Started my Jeep early to defrost my windshield, and while i was driving i had the control set to aim at my feet. After about 10 minutes it started blowing cold air and my water temp was going up; almost hit 260°. Played around with the controls a little bit and it started to blow hot again and temp went down to normal operating temp. Any ideas on what i should check for? Thanks
Junior Member
Joined: May 2008
Posts: 15,016
Likes: 11
From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
Started my Jeep early to defrost my windshield, and while i was driving i had the control set to aim at my feet. After about 10 minutes it started blowing cold air and my water temp was going up; almost hit 260°. Played around with the controls a little bit and it started to blow hot again and temp went down to normal operating temp. Any ideas on what i should check for? Thanks
You symptoms don't point to anything in particular other than it's running hot and the only thing keeping it from hitting red line is the extra cooling effect from the heater core.
I need more details.
Well l the long story short. I just bought my first jeep ever actually my first vehicle Out side of Ford lol. I bought a 91 jeep xj with a blown 4.0 in it the original owner ran it out of oil. The body is bone stock with just little bit of rust and the price tag was cheap so I could not pass the deal up. I got an other engine for it and cleaned it up and it's all most ready to put in and the other one that's blow is ready to take out. So my question is, is there helpful tips out there for doing a engine swap? I also what to replace all the hoses Under The Hood. Is There A Kit That Comes With Everything? Is there anything else that I should do special I should do? Thanks for any help I can get!
Ok so I fixed the manifold leak on my 1999 jeep cherokee sport inline 6 engine and I got some fuel on the belts, and there's a loud squeaking and it only gets worse below 30 mph, I put back the power steering pumping right and the belts are tight but when I turn all the way left it squeaks, and my ac doesn't work anymore so that's what I thought the problem was, and I'm not sure if it was caused by the engine revving it's self really high from the intake manifold leak, or the fuel on the belt, or the ac going out, any body have any ideas?
Junior Member
Joined: May 2008
Posts: 15,016
Likes: 11
From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
CF Veteran
Joined: Aug 2010
Posts: 1,085
Likes: 3
From: Fountain Inn, SC
Year: 1988
Model: Comanche (MJ)
Engine: I6 4.0L
Ok so I fixed the manifold leak on my 1999 jeep cherokee sport inline 6 engine and I got some fuel on the belts, and there's a loud squeaking and it only gets worse below 30 mph, I put back the power steering pumping right and the belts are tight but when I turn all the way left it squeaks, and my ac doesn't work anymore so that's what I thought the problem was, and I'm not sure if it was caused by the engine revving it's self really high from the intake manifold leak, or the fuel on the belt, or the ac going out, any body have any ideas?
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Beach Bum
Joined: Jul 2011
Posts: 6,123
Likes: 22
From: Cape Hatteras, North Carolina
Year: 2000 WJ
Model: Grand Cherokee
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6





