Everything hooked up n running fine. Im boosting but Guage wont go past 0. Its reads Vaccum around 20 no problem. But onc ei floor it, it goes up to 0 PSI and nothing more. WTF is goinon. Can i adjust guage or something.

 

what gauge is it..........it may be faulty

 

Maybe the Vaccum source you selected has a check valve.
so it will only see vaccum
try another vaccum source

 

theres another post on this lower int he chain . damn this seems to be a common prob

 

Ok, ill try that, thanx alot man
Ill let u all know

 

oh BTW
its an Autometer Mechanical

 

ur vacuum line to the guage might be creased, check charge pipes too