Vg30i manifold hose connection

[josuetrejoreal]

Can some body tell me what hose  are connected ?? 

[Slartibartfast]

That's a surprisingly tough one to track down, especially as I've never worked with the throttle body injection system and don't have one to go look at.

 

This is the only diagram I've found that shows it. Nissan calls it "Connector, B," which doesn't tell us much. Weirdly it has a different part number depending on which transmission you have. 14876-12G00 if you have a manual transmission, 14876-12G01 for automatic. Looks like it was supposed to have a cap on the top fitting.

 

The vacuum diagrams in the manual are in schematic view, so I can't tell which bits connect where. But I can see which vacuum lines connect to the manifold. There's one from the air cleaner (for the vacuum motor that controls the flap that makes it suck warm or cold air), one from the AB valve (looks like that stands for Anti-Backfire, bleeds air past the throttle body if there's excessive manifold vacuum?), one from the carbon canister, one from the solenoid for the EGR valve (though it looks like that port is on the throttle body), and one from the air injection solenoid valve.

 

I would check that those systems and their vacuum lines are still present, and if they are, follow the vacuum lines back to the manifold to make sure they're still connected.

 

The picture of the manifold in this post shows a very short vacuum line coming off of that connector. Maybe it had been cut for a while, or maybe whatever it hooked to was supposed to be nearby.

 

This guy figured it was smog related and blocked it off while deleting the rest of his smog gear.

 

If you can't work out what it's for, I would put vacuum caps on both nipples (on the fitting, not your own, unless you're into that) and leave it alone.