Electrical problem?
 

Ive got a question, maybe somebody can help me. I've got a 2005 Mazda 6i, and recently started having problems with it. It started out with what i thought was a bad battery, but ended up being the alternator overcharging. It ended blowing the battery, got a new battery and replaced the alternator. Now it seems to have a short somewhere, cause as soon as i touch the battery cable, it sparks pretty bad. It also won't start. All the lights and everything work, but when i crank it, there's nothing at all. i also noticed the "INJ" fuse keeps burning out. Any thoughts as to what might be going on?

wow
 

i really hope someone can help you out! i have the exact car (except i have the sport addition and i don't know if that makes any difference) and i'm hoping that i won't need this information but if i do.....