What are these "uncapped" vacuum ports on my throttle body for????

["Turbo-T"]

I am currently installing an RJC power plate on my Buick. While I have the throttle body/upper plenum assembly off, I discovered two vacuum ports on the TB that are not capped, and do not appear to have been used for a long time.

One of them is directly behind the IAC and the other is on the pass side behind the TPS.

What did they go to?

Also would having them uncapped cause boost issues? Or even knock retard issues?

 

[TURBOPOWERED68]

Sounds like its the water lines to the T-Body have been disconnected.

 

["Turbo-T"]

How did these water lines work? And are they needed?

Here's a few pics:

And a close up of the two...

 

[87NAT]

Its just some ports to run the coolant water thru the TB. Emissions thing..you dont need em. Unless of course you install a Ballbearing turbo. Thats the ports you can hook your water up to.

Leave them uncapped. They arent hurting anything.

 

["Turbo-T"]

Thanks. Never thought the throttle body would have water ports on it.

 

[ngnowner]

emissions

Thanks. Never thought the throttle body would have water ports on it.

It's to warm the intake charge

Why would we want to do that after spending all that money on alky:biggrin:

 

[NJ Torque]

Its so you TB blade doesnt ice up in the winter....

 

["Turbo-T"]

I am assuming they tapped into the coolant system somehow?

 

[David65]

I am assuming they tapped into the coolant system somehow?

Yes, see #'s 16 & 18 here: http://perfauto.tripod.com/data/3-224.pdf

 

["Turbo-T"]

Thanx for the link, how can I print the pages?