exhaust gas recirculator vacuum timer?

I have an ungodly vacuum leak and I can't find it. I've tried carb cleaner, water in a spray bottle, and taking it to a garage for them to not to be able find it. I have one part that is not connected to anything. It has a two pronged electrical terminal and metal vacuum port on one end and two plastic vacuum ports on the other. My diagram only shows two lines. One from the carb and the other from the ported vacuum switch. Is the part I have boxed in red the one in question? And, where do...

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Author: Deano