Vacuum idle around "20"? Your gage must read vacuum in units of inHg (inches of mercury). 29.53 inHg = 14.50 psi = 1.0 bar. Atmospheric pressure at sea level is around 15 psi absolute, so it's not possible to create 20 psi gage vacuum.MaVeRiC said:I do have a boost gauge and the highest reading I get is just below 0. It never goes into the PSI side. It idles at around 20 and when I accelerate it goes up to just below 0. I made an app. at the dealer for Friday, unless I can figure out wtf is wrong before then. I don't have the money for a vag. Especially if I'm gonna have to cough up some major cash to get it fixed.