I know you're anxious to get this resolved as soon as possible, however we do request that you do not create a new thread for the same topic.
Anyway, sorry to hear that your car is having trouble. I'm not all too well versed in your vehicle, but can offer an option for you.
Here at NICO, we have Factory Service Manuals available free to members. Here's the direct link for the FSM for your car:
2008 Nissan Altima
Take a look at the link for your car and you'll have all the info you'll ever need to make repairs and try to diagnose things for yourself while help is on the way.