Sep 21, 2015, 03:49 PM
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XJ Ask the Question Thread
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
Been chasing a hard starting problem for months. Have eliminated many possible causes. Usually takes 5-15 tries to start, cranking but not starting, hot or cold, although hot usually starts faster. Recently noticed that it sometimes starts in fewer tries from Neutral, and that sometimes it will not crank in Park but will in N, or vice versa. My understanding has been that it shouldn’t even crank if the NSS is bad, but this behavior makes me wonder. Tried to see what would happen if I bypassed the NSS as described in multiple threads, but either it’s not the NSS or I never found the right connector/pins to jump as I never got to a place of a quick start. 96 xj 4.0 auto. Also wondering if the trouble is a bad ignition switch and/or key cylinder.... there’s a lot of play there, and the car was stolen six months ago (presumably with a screwdriver start), but don’t know how to test for this. Trying different pressures, angles etc when turning key doesn’t seem to make much difference.
If it had a screw driver start at some point in its life. Im sure alot of stuff is messed up in the cylinder.. I would replace it.
Member
Joined: Feb 2009
Posts: 101
Likes: 1
From: Tampa, FL
Year: 96
Model: Cherokee
Engine: 4.0
Newbie
Joined: Apr 2017
Posts: 11
Likes: 0
From: Modesto, CA
Year: 2000
Model: Cherokee
So, I have to replace the engine in my 2000 xj and I Just found an ATK remanufactured engine with 600 miles on it for $800. Its out of a 2000 grand cherokee, it should be a direct swap right?
Senior Member
Joined: May 2014
Posts: 777
Likes: 5
From: Nolensville, TN
Year: 1998
Model: 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
2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.
XJ/ZJ blocks, and the 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).
TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.
XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: May 2015
Posts: 4,481
Likes: 18
From: Arizona
Year: 97
Model: Cherokee
Engine: 4.0
I can see that happening somewhere but not here..Just about Everyone in Juneau grew up together. I can go to the dealership and see ppl I went to elementary school with. Thats how it is all over town, Im waving at ppl all day...lol. So if someone told me 4 days and did it in two..The news would get out real fast and ppl would tag that place as rip off.
You must understand Juneau has no roads in or out so its like a island in a way..
This town has the AK spirit and small town feel. We tend to help others out more here, we are like a big family.. Juneau sticks together.
I guess it comes down to how your relationship is with a shop and the techs. Ive had guys move cars out of bays for me to get my rig done.
You must understand Juneau has no roads in or out so its like a island in a way..
This town has the AK spirit and small town feel. We tend to help others out more here, we are like a big family.. Juneau sticks together.
I guess it comes down to how your relationship is with a shop and the techs. Ive had guys move cars out of bays for me to get my rig done.
Newbie
Joined: Apr 2017
Posts: 11
Likes: 0
From: Modesto, CA
Year: 2000
Model: Cherokee
XJ Cherokee and ZJ Grand Cherokee 4.0L engine blocks interchange.
2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.
XJ/ZJ blocks, and the 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).
TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.
XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)
2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.
XJ/ZJ blocks, and the 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).
TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.
XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)
Well damn.
Newbie
Joined: Apr 2017
Posts: 11
Likes: 0
From: Modesto, CA
Year: 2000
Model: Cherokee
Junior Member
Joined: Jan 2012
Posts: 47
Likes: 1
From: Nevada
Year: 1991
Engine: 4.0
1991 speed sensor issues
I tried doing a search as well as an advanced search and could not get any specific threads to materialize. Not sure if it is because I am using Safari or what. I need to get information on 1991 Cherokee 4.0L speed sensor and related parts. I own the original dealer shop manuals and I can not even find any information in them. The Jeep dealer wants to give me a speed sensor that does not look anything like the original.
CF Veteran
Joined: Aug 2009
Posts: 5,676
Likes: 301
From: WV
Year: '96
Model: Cherokee
Senior Member
Joined: Sep 2017
Posts: 717
Likes: 8
So I've got my 96 4.0L (181k) on the stand and I'm going through and re-doing all the seals and gaskets—I got the Fel-Pro kits for a sweet closeout deal on RockAuto.
I read in an older tech thread on this forum that advises against changing/messing-at-all-with the oil pump gasket. The last 4.0 I worked on, I replaced it, and because I had purchased a new pump also, the old gasket had to come out anyway. However this time around, I'm leaving the original pump in.
Do the cons really outweigh the pros for replacing the pump gasket?
All my nervous ticks are going off because there will be gaskets I'm not using :S
Thanks
I read in an older tech thread on this forum that advises against changing/messing-at-all-with the oil pump gasket. The last 4.0 I worked on, I replaced it, and because I had purchased a new pump also, the old gasket had to come out anyway. However this time around, I'm leaving the original pump in.
Do the cons really outweigh the pros for replacing the pump gasket?
All my nervous ticks are going off because there will be gaskets I'm not using :S
Thanks