i have a emg 81 and 85 and they keep sliding out i went over and them and reinstalled them but nothing seemed to be wrong they just keep sliding out.
take it in to your local guitar tech, you were pretty vague with your description so I can't help you out sorry
I think thats what my pickup does too. It just slides out and lays against the strings. I just put some tape on it b/c the guitar shop says that I would have to buy a new one to fix it.
is the thread ruined on the pickup part? like on the metal base? if so you could just try to rethread that. just a thought. and check the springs on them so make sure they're well, springy.
do you have springs on the mounting screws?
crap i took out the springs how do you put em back in?
you're gonna have to restring, but unscrew the humbucker mounting ring, lift it up put the screws on, then put it all back. it'll take you like 20 minutes.