VAC pipes

[DEREKCO]

Help what are the 2 VAC hoses coming off the back of my ABY Inlet manifold one is connected to a small steel pipe the other (which is spilt ) connects to a pink plastic pipe ,reason is coming home the car was fine until I pulled out to overtake and all I got was no power or boost ,I have checked briefly other hoses (not taken any off cause its pi----- down ) that is the only hose I could find fault with it literature fell apart ,any ideas.Derek ps thanks for any help

[John.]

Could it be the one that goes to the ECU?

[newsh]

Diff controller and vacuum res. it will be a boost leak and the car will go into limp mode.

http://s2central.net/images/Vacuum_and_PCV/ABY_Vacuum_Tree.jpg

[DEREKCO]

vac pipe

I do not see a t piece all I see is a rubber hose connected to a pink plastic pipe which runs into bulkhead then to an ecu in the passenger footwell

[DEREKCO]

vac pipes

just checked again pink plastic pipe goes to ECU in passenger footwell no tee piece unless its inside the car behind the bulkhead under the dash panel

[DEREKCO]

No boost

I renewed both VAC pipes on the back of the Inlet manifold one to green plastic pipe the other to the pink plastic pipe went for a short run no boost ,took turbo Inlet hose off turbine blades look fine spins freely I did a vagcom and code 00561 appears what am I looking for should I go deeper into the turbo and intercooler hoses? HELP

[UrS4boy]

just checked again pink plastic pipe goes to ECU in passenger footwell no tee piece unless its inside the car behind the bulkhead under the dash panel

The pink hose should go to the rear diff lock system. A green plastic hose should go to the ECU, not pink.

[UrS4boy]

3B/ABY/ADU boost leak testing

I I did a vagcom and code 00561 appears what am I looking for should I go deeper into the turbo and intercooler hoses? HELP

00561

Mixture adaptation

-Adaptation limit
(multiplicative)
exceeded
-Adaptation limit
(multiplicative) not
reached
-Adaptation limit
(additive) exceeded
-Adaptation limit
(additive) not reached


REFERENCE: http://www.s2-audi.co.uk/tech_articl...ecu_faults.htm

Typically this means a boost leak. Most common spot on a 3B/ABY/ADU seems to be the rubber boot right at the throttle body:

3B/ABY/ADU boost leak testing:

http://www.s2forum.com/forum/showthread.php?t=63974&highlight=3b+boost+leak

[andy10v]

I renewed both VAC pipes on the back of the Inlet manifold one to green plastic pipe the other to the pink plastic pipe went for a short run no boost ,took turbo Inlet hose off turbine blades look fine spins freely I did a vagcom and code 00561 appears what am I looking for should I go deeper into the turbo and intercooler hoses? HELP

Do a boost leak test as Dave says.

[newsh]

Yes, boost leak test! and check the pipe routing, the pink should be difflock, the green to ECU.

Have you got a boost gauge?