Spike gets electrocuted and wakes up in Buffy's basement, but he can't talk. Xander takes him home and at the end of the fic Spike realizes the chip stopped working. Spike can't speak through the entire story. I know it's not Lost by velvetcrypt because I just reread that one. Does this sound familiar to anyone? *bats eyes*
EDIT: Nevermind, I found it! Notice