Car almost dying while driving...could be alt?

[s13pignose]

OKay my car as of last month has been acting weird. I've had two rough starts, I've had the car to almost die and notice near 2k and like 2300 rpm..but it doesn't, and today I had it to wear it wouldn't start on first crank.

The problems while driving is weird..for my tach won't stay steady at idle sometimes, and while driving at like 2k rpm the car would sorta bog but catches it self. Then today I was sitting in parking lot with my headlights on which I've done on accident before..but this time the car cranked but didn't start. So i turned the key back and tried again, and it started but heard a click like behind the dash...

With some searching I read someone else has had this click sound before

http://zilvia.net/f/s-chassis/225969...tery-help.html

I wanna testing to see if it's the alt in the morning..do I disconnect both batt wires or just the ground? I do it while the car is running correct?

Thanks for any help

Could my alt be the problem? I hope it's not the battery, because I have an optima redtop that's no more than 2 years old probably. I even sprayed 2 cans of intake cleaner down my AICV hose..and still have these problems