There’s an odd thing with the librands that pass under the sump. You need to also swap the wiring looms to the lambda sensors from side to side.
Apparently confuses the ecu no end if you don’t.
That’s the very thing that happened to a friend. Ended up with several trips to a garage, bits replaced with no improvement and it turned out to be lambda sensors needed swapping over from side to side. Forgive me but are you sure the Librands instructions are correct and have been interpreted correctly??