So i have a boost gauge that reads 10-12psi when idle and 8-10 vac when max boostering and like 20-30 psi when i let off the gas. i don't know if it's just broken or is hooked up wrong or what. any idles.

and the controller is set to 8psi i believe

 

have you tried pluging it into a different manifold vacuum source?

 

o_0... where would i find that?

 

DAPDAS

 

My guess is that you are reading the gauge wrong and don't know what to expect. This is what you are probably seeing, and is about what I would expect to see:

1. at idle, it reads 10-12 in Hg of vacuum (not psi of boost)
2. at max boost, it reads 8-10 psi of boost
3. when you let off, it reads 20-30 in Hg of vacuum

-Max