Boost gauage says 5psi but its way more and suggestions?

[86TType]

I recently installed some new injectors...turn the boost too bout 18psi...been running fine. Next couple of days of driving i notice when i ease into it the boost gauge never go pass 5 psi but it seems to be still set at 18psi...do u think something came aloose from the gauge?

 

[pontiac69fb]

Yep, you answered your own question.

 

[86TType]

What does the boost gauge hook up too?

 

[pontiac69fb]

Small vacuum hose that goes from under the hood to behind the firewall.

 

[forzfed]

Sounds like you either have a small hole some where in the vac line or at the connection to the boost gauge.