BC928

Takes vac from the intake, and also is connected at the rear to the evap/ charcoal.

Any real idea how this all is triggered?

Plutoe

goto WIS and check the fuel emissions system.

BC928

Horrible software any way you slice it. If you don't know, that's okay.

I am talking about how the evap valves I show are monitored, as well as how they may be opened and closed so I can re-create what the ECU needs to see but remove this hardware and the plumbing.

Plutoe

Its all mapped in the ECU---look there or see a tuner!