This is on a b18c1 with a p28 obd 1 ecu. When measuring the charging voltage at the battery with the car at idle the voltage is 12.6 volts, even when bringing the rpms above 2000 rpm. The battery is new and this is the 2nd alternator, the previous alternator was putting out between 12.6 and 12.4 volts and with a load put on by autozone it went down to 11.5 volts, they said the alternator tested good. As of right now the car seems to be running ok, but every now and then when idling I will catch the tach and it will kinda figit real quick and start to get more pops in my exhaust than normal. From what I have read the alternator should be putting out between 13.5 and 14.5 volts. I was real surprised when I put my new alternator in and I was pretty much getting the same voltage as before. I am concerned because I have run into this similar problem before where it seems to get to the point where the idle will seem to get real low and start stalling the car out, I assume it's not doing that now cause my battery is still fresh but I could see it happening again in the future. Ok guys, what should I check first, grounds, ecu?? Btw not getting any codes what's so ever, I am chipped and tuned with ectune if that would make any difference.