Originally Posted by cherokeesam
I think we can find the answer in the title.
Yes, Steve may not like or trust Fury (who does?), but if Fury deduces that Winter Soldier is actually Bucky, who's the first guy he'll think to contact?
While it is true that Steve would certainly work for SHIELD if he learned about Bucky's plight, I doubt Fury would call him in. He'd be too involved and liable to act rashly, and Fury would be likelier to hand the matter to one of his trusted agents.