one day i drove my truck home and then went to go start it 10 minutes later and nothing it was a bunch of grinding in the starter. so i look at it 2 weeks later and what do u know the start is lose so i tightend it back up. charged the battery and still nothing worked no more grinding in the starter so i hooked jumper cables up to the truck and it started like that.but i went to take the jumper cables off and not evan a second later the truck dyes and then is wont start agian by its self idk what it could be it might be the altonater or bad battery cause when i charged the battery i put on concret and i forgot not to opps. the battery is low on acid but i dont hink that matters.please help asap