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.
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.