Quote Originally Posted by TDCRacing View Post
Ok then you tell us what the problem is.
Faulty voltage regulator in the alternator or faulty alternator. It's simply having trouble maintaining voltage at idle. My car can maintain up to 15+ volts if the battery is low at 650-700RPMs idle. If it isn't giving you problems while driving, then it really isn't a big deal.

Though, I've seen this be a prelude to an alternator that just gives out. Can't say exactly when or even if. But it's possible.