there is also an electrical load detector or something like this, my b16 has always done this and when a load is put on it idles down a little and then back up. lights on, stereo, then hit the brakes at a light and stop and it does it. i should look into some of these things. i want to redo my grounds with some old streetwires 4 guage since i got it for free back in the day and add a couple of extra ones since this actually helps alot.