Does it sound correct in English?
1. When I was younger I had been going in for sport.
2. When I was younger I had gone in for sport.
3. While I went on the road I had lost my money.

Question

Answer

1. and 2. Should be something like:
When I was younger, I played a lot of sports.

3. Should be something like:
While on the road I lost my money.

Answer

1. When I was younger I went in for a lot of sport. [or sports]
2. second sentence does not work.
3. While I was on the road I lost my money.

Answer

Thx to you Altini. As I understood "go in for sports" is British way to say and Americans don't say so.

Answer

No they are not. You play sports. You do sports. You do not go in for sports. It sounds weird.