i have a 98 si my alternator was over chargeing and ruined my battery and blew the amp for my stereo...i put a new alternator on and is charging fine but if i let it sit it will drain the battery and sparks come from the negitive post what could be drawing power? i already disconnected the sub wires

 

there is no such thing as a 98 si

 

There is in Canada.

 

http://www.wikihow.com/Find-a-Parasitic-Battery-Drain

 

i stand corrected excuse me while i stand in time out

 

Next time just word it to where it doesn't make you look like a fool. But regardless if you had any audio system than you need to double check your wiring and make sure its making contact with bare metal.