Quote Originally Posted by IOnlyLookStock
Ya the voltage needs to be around 13.5-14.3 at idle. Check your ground for the alternator as well. That happened to my old Integra. The ground wasn't screwed down tight and it would read around 12.1 at idle. I fixed it and the alt was fine from then on. I have a GSR alternator in my garage that works great, Ill sell it to you for 80 bucks but I'm not sure if it fits LS or just GSR. Go to autozone and see if they are the same alternator, and if so Ill sell you mine. Ill install it for pretty cheap too if you'd like. PM me if you are interested.
pm'd.. i might want to pick it up.. how did you get the alternator?