ok so my car sat for like 6 months all it needed was an alternator. we got one and tested it before we put it in, we also replaced the battery. it ran great for a week or so then one day i couldn't get it to start, logn story short i just tightened down the connector to the battery. ran real smooth for 2 days and then today it wouldn't start with out a jump one to get to work and one to get home tonight .. any suggestions?