Originally Posted by
4drturbo
Just installed my UltraGauge. I have boost psi set up. But at idle it shows only -9.6 inches of vacuum. Seems way too low unless I have a massive vacuum leak? If I did why am I idling perfect around 750rpms.
Vacuum leaks would increase the pressure in the manifold, moving the pressure toward the ambient pressure, because it would be sucking air into the manifold
system.