Does the Fried Liver Attack always work?


Depends who your opponent is and what your play-style is. Personally, I believe that the Fried Liver is for players that want to take initiative and control the game, so I like it. However, you must analyse and study different lines like the Polerio Defense.
Otherwise, the engine believes that you are winning if you do go into the Fried Liver.
I have played many games with this opening attack.
If your opponent is experienced, they will probably play the 3...Bc5 (Giuoco Piano), so you should analyse and study that too.
Hope it helped!