Join Date: Mar 2002
Location: Austin, TX, USA
How low is low vacuum. Do you have a hand vacuum pump? If not, get one for about $15 or so at the autoparts or sears stores. You can read vacuum with it just like any vacuum guage. You can also pump a vacuum to see if you have leaks in your head light actuators or how much vacuum it takes to pull it in.
If everything checks out you could blast a bit of silicon spray in there and maybe free it up a bit if it's sticking.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI