what is that thing of the day

[hpmad]

Hello!

I have another what is that thing that I want to run past you.
at the left back of the engine, I have that a pipe which is disconnected and that I can not reconnect because the pipe it connects in is more or less dead.
Can someone identify this pipe, what it's doing, and what is going to be done wrong if it is not connected.

the car is a 1980 911 SC.

the pipe is located next to the connection for the o2 sensor (see picture)



and is connected on the other side to the CIS/air box stuff (I do not know how to describe it better), but look at the picture (it's the air intake on the right).



you can see better pictures at:
http://hpmad.homeip.net/what%20is%20that/big.html


Also, I created an easy o2 connect/disconnect stuff, see:



Thanks, cyrille

[AFJuvat]

Looks sort of like the vacuum line for the brake booster

AFJuvat

[oneblueyedog]

It's either that or an emissions hose. See if it goes to the Charcoal canister.

[oneblueyedog]

If the hole goes into the airbox ( plastic protrusion from the airbox, not steel) it's an emissions hose to the Char Can.

[hpmad]

hello

Originally posted by oneblueyedog
If the hole goes into the airbox ( plastic protrusion from the airbox, not steel) it's an emissions hose to the Char Can.

so, what will happen if it is disconnected? beside the EPA going down upon me?

[jdowty3]

On my 83 SC, that port off the air box goes to a port on top of the cruise control tempomat in the corner between the firewall and the fuel accumulator. If it was open, it would be a considerable vacuum leak.

[hpmad]

hello

Originally posted by jdowty3
On my 83 SC, that port off the air box goes to a port on top of the cruise control tempomat in the corner between the firewall and the fuel accumulator. If it was open, it would be a considerable vacuum leak.

could that explain why the cruise control loses the speed when the engine warms up? and why the IDLE speed get higher and higher as the temperature goes up?