hey i installed a autometer boost guage lastnight in my 98 gst and when i hooked it up i hooked it to vaccume line that was close to the firewall. now that is holding fine but as i was testing it yesterday at full throttle i hit 10 psi is that stock psi for a stock car? and also as i opened it up it lagged for a sec then took off(i might have been in too low of rpms) but a check engine light popped on but it doesn't feel like anything is wrong. anyone have any ideas?

 

well the check engine light went away so i guess my car was just whining