Join Date: Jun 2010
Location: Olympia, Washington, USA
Obviously, I haven't been to work yet, but have a theory. I'll let everyone know tomorrow. But for right now, I suspect both vacuum sources are used. The small port in question, at just off idle may allow initial vacuum to the diaphragm though a "ported" vacuum source. A transition circuit, if you will. At which point, venturi vacuum takes over and modulates the slide accordingly?
Libraries are full of stuff I don\'t know.