Valve cover differences and carbon canister removal

[Marc Swanson]

> I could do that with a check valve to keep it under
> vacuum.


Yes, that's what the factory does I believe.

> So when does the Carbon Canister Valve decide
> it should be open to let the fumes into the engine
> anyways?

Someone correct me if I'm wrong here, but I think it is a duty cycle device
much like the ISV and it operates mostly when the engine is on decel or idle.



HTH

-Marc-
87 4ktq
88 90q