boost/vacuum gauge reading

[kirbstomp]

Hey guys,

I did a search and the closest thread that related to my problem was:

zerothread?id=3271

but the question wasn't really answered. So I have an Autometer mechanical gauge on my redtop that I've had for almost a year. I traded with someone my old autometer which had no vac reading for one that did (-30psi-20psi). Didn't change the vac line, just swapped the gauges. So I've never had a gauge with vac and not sure if this is normal. My SR runs fine, but at idle it reads 0 psi. When I feather the gas whether in gear or neutral it goes into vac usually around -15-20psi. I've tested it out at full throttle as well and it reads about 9psi on stock turbo with 3" dp and exhuast which should be normal. So what do you think? Is the gauge malfunctioning?? Any help would be appreciated.

Kirbstomp

[double_jd13]

where are you tapping your vacumm at? i have mine on the line that runs over to the intake. which also is the one my boost controller is on.