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i don't think you fully grasp the difference between vacuum and boost. When your engine is turned off, the gauge should be at 0. (atmospheric pressure). When you fire it up, it will go down (to the left, into vacuum). It is normal to be around 15-20 mmHg when idling. Most of the time while you're just cruising, it will be in vacuum, and begin to rise with slight throttle inputs. When you step on it, it should go past the 0, and into a new set of numbers (psi, to the right of the 0) which is boost.
Does your gauge stay below 0 the entire time?
that's sweet you live in garden grove...where is that? does it smell like lou dog inside your van?
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