With your Low-beam on during night driving, when you pull the head lamp lever towards yourself to "flash" your hi-beam(when seeing leng lui or going to overtake or etc.), does your Low-beam...
when the is -vacuum it will suck the diaframe to lower down the pressure, full throttle when 0 vacuum most of the stock regulator will rise to 41psi.
how about boost?
will the air pressure push the diaframe down and...