While I'm at a stop light or idle while in drive the car usually idles at 700-800rpms and it drops to about 500 (maybe even a little less) and it feels like it's going to stall but it never does. The rpms then go back up to normal. It also happens while I'm in park but not as much (or i just don't notice it).
What could be the problem that could be causing this? I have had a battery terminal problem that the negative terminal has a small crack where it connects to the battery but it has been fine for months since this, could it be related?
The check engine light is not on and the car is running fine besides that.
I have a 2001 4cyl with a CAI.
Thanks for your help.