year 87
model turbo II
specifics: all stock


on my car it feels like theres a distinct change in the throttle cable tension when what i assume a second set of butterflies is opening. before hitting that change in feel, the boost gauge normally reads -20 vac. and only reads any kind of boost once I've gotten into the "secondary" butterflies or that change in throttle feel.

is this how anyone else's car/gauges behave?

 

It will only read boost, when you boost

Are you saying it doesn't move at all until then?

 

sounds like turbo lag....

 

Don't over think it.

The car will only go into boost when the load on the engine dictates it.

Now, there is a second (actually third) set of throttle plates connected to a vacuum actuator. Check in the engine bay that they move freely and that the vacuum line is connected.