3B Vacuum Tree Diagram, Arrangement of Vacuum Lines

[s2driveruk]

Good man - thats a useful pic!!!

[fundahl]

Wow great info! Is there a thread like this for the AAN?

[UrS4boy]

AAN Vacuum Tree Info

Wow great info! Is there a thread like this for the AAN?

Maybe not here but I did an AAN vacuum post at my home forum (uses a version on Paul N.'s diagram) with links to the devices the vacuum tree is connected to:

http://forums.quattroworld.com/s4s6/msgs/188845.phtml

If you are looking for more AAN info, you might want to check out this Engine Bay Device Map (click on the labels, they are live links):

http://members.shaw.ca/speedtek/UrS%20Engine%20Bay%20Device%20Map.html

[fundahl]

Maybe not here but I did an AAN vacuum post at my home forum (uses a version on Paul N.'s diagram) with links to the devices the vacuum tree is connected to:

http://forums.quattroworld.com/s4s6/msgs/188845.phtml

If you are looking for more AAN info, you might want to check out this Engine Bay Device Map (click on the labels, they are live links):

http://members.shaw.ca/speedtek/UrS%...ice%20Map.html

You are awesome man, that is perfect!

[Boxerfan]

What does the carbon canister connect to? i can't make it out

Also, does it connect to that green line? Odd that it seems to connect to nowhere.

I just found a line dangling from a black box behind the rad on my Coupe Quattro. not sure if it has been blown off by boost.

Cheers;

Andrew

[UrS4boy]

Also, does it connect to that green line? Odd that it seems to connect to nowhere. I just found a line dangling from a black box behind the rad on my Coupe Quattro. not sure if it has been blown off by boost. Cheers;
Andrew

Not sure what a 7A coupe quattro has but typically on an S2 or UrS4/S6, the green plastic line from the engine bay goes to the ECU to provide the MAP sensor with the pressure signal that the ECU needs to decide how to control the N75 WGFV. Naturally a 7A has no turbo or WGFV so maybe provide more info (photo?).

UPDATE: Just saw that you coupe quattro has a 7A but that it also has the 3B turbo system.

[Boxerfan]

Yep. 3B. I was commenting to the first diagram posted.

[newsh]

Also, does it connect to that green line? Odd that it seems to connect to nowhere.

I just found a line dangling from a black box behind the rad on my Coupe Quattro. not sure if it has been blown off by boost.

Cheers;

Andrew

N80 Carbon can valve connects via T piece into the PCV system which then connects to the larger vacuum point underneath the IM near the throttle body.

[UrS4boy]

3B/AAB/ABY/ADU PCV system info

N80 Carbon can valve connects via T piece into the PCV system which then connects to the larger vacuum point underneath the IM near the throttle body.[/IMG]

Nice annotated diagram.

Glad to see it used.

Here is the link to the complete 3B/AAB/ABY/ADU PCV system post for the OP to read:

http://forums.quattroworld.com/s4s6/msgs/22506.phtml

[newsh]

[Boxerfan]

Awesome. Thanks guys. I guess my Saturday is full now!

It also turns out that the engine is an AAN from an early S4. What a relief the CR is reasonable for the turbo system!