voltage regualtor

i have a newer (6wks) voltage regulator, i put a charging system tester on the bat, and when car was on i was getting about 12-13, kinda low. i bypassed the reg. and it was charging the bat ,and also when the reg. was bypassed and i would rev it, it would sound like my alt. belt was really slipping and squeal loudly but when i reconnect the reg. it wouldnt do it anymore so do new voltage regulators usually go out like that? also, in my factory service manual and chilton book, it says that my car has a mechanical voltage reg. with points. mine isnt with points, its just a little computer chip looking thing, and it says the mech. regs, are adjustable, so is there a way to adjust my electronic one?
Author: sgp7679