Hi again,ok. LS400 ecu arent so common over here. I often swap in celsior ECU but there are other things to consider when doing so. Just did one recently
The guy informed me that he is having the caps changed and ECU checked by a ECU specialist we will see how he gets on.I did a swap recently of a ucf20 ls400 ecu to celsior. Video here
It resulted in the egr being turned off without codes and a code behind for hydraulic fan. Car ran fine and code didnt result in check light.
Have you not got a good ECU rebuilder you can use? I would be happy enough to swap to a celsior ecu however I have the advantage of trying one first as I keep a test ecu from each ecu range. Cheers.