I've spent half of my day feeling like a retard. I have a 77 280z, just got it a couple of days ago and I'm trying to get familiar with everything on it. I've run across an assembly that is confusing me.
Located on the passenger side of the engine, attached to the inside fender is a plastic canister (not the charcoal/carbon canister) that has vacuum lines running to(iirc); the intake mani, a diaphragm looking device attached to the intake manifold and then to another device mounted just above the canister. Now, I'm fairly certain the L28E has a MAF meter(right?) so this can't be a MAP thing... and there is a hose connected to the 2nd assembly that goes through the firewall... I'd think if that was to a gauge it'd be for pressure and the oil gauge is the only thing I'm seeing there... so... ???
I was thinking emissions, but I figured I'd ask before I went crazy trying to figure it out myself... I can post pictures if needed, but I figured this would be a duh thing.