Alright when I start my car after letting it sit for awhile it just dies. Then to start it back up I have to hold the gas to the floor while trying to start it. I have to do that 2-3 times before it starts. And sometimes when I'm sitting at a light my interior lights will dim and the idle will go down. Any leads on what could be wrong.

 

weak battery i'd guess. could be caused by weak alternator...