Tiny plastic line left side front??
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Joined: Aug 2011
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From: North Carolina
Tiny plastic line left side front??
Can anyone tell me what the heck this little plastic line is/does? It was hanging down below the front bumper valence and appears to be broken off at the end. I've looked all over under there and can't see the other end or a logical attachment point. It is sort of insulated with a fabric cover part of the way. It originates up behind the power steering pump reservoir and in front of the washer reservoir but I can't see the actual connection at that point. It's sort of up under the curl of the front fender. No CEL or codes and everything seems to work okay. It's not a vacuum or at least it doesn't suck. Sorry. 2001 A6 Avant 2.8 30v. In the lower photo it's at the bottom with the braided covering. Can't find it in the Bentley.
Last edited by Huskerbob; Feb 23, 2013 at 05:40 AM.
Thread Starter
AudiWorld Senior Member
Joined: Aug 2011
Posts: 1,155
Likes: 0
From: North Carolina
Thread Starter
AudiWorld Senior Member
Joined: Aug 2011
Posts: 1,155
Likes: 0
From: North Carolina
Vacuum line, unidentified?
Tech Guru
Joined: Oct 2002
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From: Olney, MD
How about the mess/maze of vacuum lines that control the variable intake manifold runners/flappers?
The suck on those lines is controlled by an electric solenoid/valve actuated at various engine speeds.
You wouldn't notice it and it wouldn't trigger a CEL. Similar to frozen flappers/rods.
The suck on those lines is controlled by an electric solenoid/valve actuated at various engine speeds.
You wouldn't notice it and it wouldn't trigger a CEL. Similar to frozen flappers/rods.
Thread Starter
AudiWorld Senior Member
Joined: Aug 2011
Posts: 1,155
Likes: 0
From: North Carolina
unidentified vacuum line??
How about the mess/maze of vacuum lines that control the variable intake manifold runners/flappers?
The suck on those lines is controlled by an electric solenoid/valve actuated at various engine speeds.
You wouldn't notice it and it wouldn't trigger a CEL. Similar to frozen flappers/rods.
The suck on those lines is controlled by an electric solenoid/valve actuated at various engine speeds.
You wouldn't notice it and it wouldn't trigger a CEL. Similar to frozen flappers/rods.
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Thread Starter
AudiWorld Senior Member
Joined: Aug 2011
Posts: 1,155
Likes: 0
From: North Carolina
I found it. Yes it is a vacuum line that comes from the left side fender then up under the plastic engine cover on the left side then up to the fuel rail, around to the plate at the back/top of the engine with all the stuff on it and then around to the right side fuel rail and then to the front of the engine to operate something I'm not up on yet. The plastic parts of the line are pretty brittle but I got it into a piece of the rubber hosing. This baby ought to run light a scalded dog now. Thanks SJB for the help. Much appreciated.
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Tech Guru
Joined: Oct 2002
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From: Olney, MD
Go ahead and STFA for the threads on ensuring/loosening/testing those shafts. Basically you just work the big levers against the spring with your hand and see if they snap back. Those levers are attached to the two vacuum motors by the 2"-3" links with ball-socket ends. You don't have to unsnap the links to test the arms/shafts.