I've searched through many pages of the forum and can't see this one, so I'll post it.

Adrenaline Rush allows you to treat a red maneuvre as white for that turn. So if you are already stressed (say from performing a red maneuvre last round), can you use this to perform a red maneuvre again.

Does this card allow you to perform a red maneuvre while stressed? You wouldn't get an action that round as you are still stressed, but being able to k-turn while stressed is likely to catch an opponent off guard.

Yes

From the FAQ, Page 8:

Q: If a ship with a stress token reveals a red maneuver, can it use Adrenaline Rush?
A: Yes. Treat the maneuver as a white maneuver; the opponent does not choose a maneuver for the stressed ship.