Is it possible that a fault with the gearbox could be the issue here? One thing that has been raised is the kick-down function and it interfering with the way the engine is operating. The car does the same whether it is in 'D' 'P' or 'N'. I can't see it myself but would be interested in any opinions...
The techs have said they have tried everything apart from the ECU, which, hopefully can be checked by swapping with another unit today.
The techs have said they have tried everything apart from the ECU, which, hopefully can be checked by swapping with another unit today.