Just purchased 2005 XJ8 L. Previous owner had problems with one injector not firing, although lead had continuity back to ECM. So, he tried to replace ECM. Replacement ECM has been installed to some point. Car starts, key works, but Instrument Panel alternately reads out CONFIG E and RESTRICTED PERFORMANCE. Car is restricted to running under 3000 RPM. Engine check light is on at start but can be reset using simple diagnostic tool supplied to me with car. Supplier of replacement ECM believes mechanic who installed the replacement ECM did not understand what he was doing. I reckon I can sort this out. Through this forum I have acquired Technical Bulletin 1-186 and the IDS-SDD-JLR Manual. I have read through this helpful post: https://www.jaguarforums.com/forum/s...c-fixed-67541/. I have ordered a JLR Mongoose and SDD software. I am in Hawaii, so no dealer on this island, and mail is slow, so I am waiting for those parts. In the meantime. all this is new to me, so if anyone has any thoughts on how I might proceed once I have the software, I would be grateful for any pointers. (By the way I think that one injector might still not be firing; I will follow up on that once I have the car operating properly.)

 

Also, I do have a simple battery charger I can connect while reprogramming.

 

You would be better off posting in the X350 forum section. This is the section for the X308 1998-2003 models.

 

Sorry for my confusion. But website says I am in the "Jaguar Forums - Jaguar Enthusiasts Forum>Jaguar Models ( Modern )>XJ XJ8 / XJR ( X308 )", which includes XJ8.

 

Oh! I see, wrong model year range. Apologies.