Remove everything regards to the turbo timer, if asked when the inspection starts I'd say it was the previous owner, and I sit in the car for a few minutes more. If you don't remove the harness and it is found then you can expect a more thorough inspection.
Also, cleaning engine I did it in 3 stages. First at home to remove the easy stuff, then I went down later and used a HP hose and degrease from oneof the those self serve wash stations. I inspected the car afterwards and noted areas I missed, then later I resprayed the engine bay specifically in those areas. My engine bay was so clean you could smell the dust burning.
I also kept the car running during the sprays and did not spray around spark plugs, altenator and battery.