boost problem

[fremmy182]

this may be normal.. but when im driving my boost guage stays at -20 and when i hit the gas it goes up to 4psi max

 

[SDGTP99]

Could be many things; vacuum leak, clogged cat, bad bbv.

 

[fremmy182]

whats your boost read when idling mines -20

 

[Fivefingerdeathpunch]

-20 is correct, anywhere from -19 to -20 is good.

 

[matt5112]

you mean vacuum measured in in Hg?

 

[fremmy182]

and when you rev it how much psi should you be getting out of the car. all i have is an air intake and a new cat but its stock still

 

[Bio248]

you shouldnt get anything when you rev it. the motor needs loan to produce boost.