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Unread 07-26-2010, 07:08 PM   #1
gensysmike
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1998 ZJ 
 
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Issues with replacement engine and transmission - SOLVED

This is a little long, but will try and keep it simple.

2000 Wrangler TJ. I had a 4 cylinder and blew the engine. Have gone to a reputable local shop that specializes in Jeeps. Decided to upgrade to a 6 cylinder. Shop found a 2000 engine for me, approximately 60000 miles. Automatic transmission and they provided that also. The rebuild is complete and I have put approximately 2500 miles on the rebuild. I am having a continuing CEL problem since the rebuild. At higher speeds 50 plus mph CEL will come on. OBD reader indicates multiple cylinder misfire. Have had it back in to shop 3 times now trying to get to the bottom of the problem. All the usual things have been looked at. There is a service bulletin out on the 4.0 with carbon build up problems that may cause this. They performed the specified decarbon procedure. CEL still comes on, not as frequently, not as long. It will go out. If I drive on secondary roads, never approaching higher speeds, CEL NEVER comes on. FYI the service bulletin is 09-003-03. Drivability is good, I do not notice any obvious performance issues. It seems to run very good. Anyway. The shop seems very uncertain at this point. They still have it, they are working on it, but I thought I would throw it up here for input. And yes, I am very frustrated, am trying to work through it with the shop, but am getting concerned.

UPDATE
After rebuild completed had an ongoing problem as outlined above. Misfires diminished after applying the decarboning TSB, but they did not go away. Camshaft Synchronizer, and CPS were replaced with Borg Warner parts. Misfires continued. Both parts were re - replaced with Mopar parts. 0 misfires after several hundred miles. I know it has been mentioned here before, but sometimes getting the MOPAR makes a difference.


Last edited by gensysmike; 07-29-2010 at 11:07 AM.. Reason: resolution
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Unread 07-28-2010, 05:36 PM   #2
gensysmike
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Unread 07-28-2010, 07:37 PM   #3
wushaw
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Did they put the 4.0 computer in and associated wiring for all the sensors for a 2000TJ?
It just sounds like they missed something, also check your cat.
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Unread 07-28-2010, 08:22 PM   #4
gensysmike
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they used the donor computer and wire harness and mated it with the existing wire harness. they use a service out of arkansas that regularly performs this modification. cat is good.
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Unread 07-28-2010, 08:56 PM   #5
wushaw
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Well have they changed the cps, kps, coil packs, checked distributor gear for wear, injectors, All the connections for corrosion or bad connections?
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Unread 07-29-2010, 11:33 AM   #6
gensysmike
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Unread 08-04-2010, 12:38 PM   #7
DirtyS
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You work for Chrysler, don't ya?
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Unread 08-05-2010, 06:18 AM   #8
keithert
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What did the new engine and labor cost you? I have an 05 and wonder what's coming down the road.
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Unread 08-05-2010, 06:24 AM   #9
j_niko
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Sounds like a timing issue
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