The caris completely dead. When I hook the new battery up it arcs and sparks what is wrong?



First I would make sure the terminal are not switched. Red cable need to go on plus terminal. 

Black cable needs to go on negative (-) terminal. My guess is that you already checked those. 

It is normal to see a small spark. But if you are seeing sparks that look like someone is welding something is wrong. 

In that case, the issue is typically due to a short. A positive cable somewhere is making contact with the ground. Check the cable that runs from the battery to the start. Also, get a digital multimeter and learn how to check contunity.