Fuel Tank venting - '83 Ur Q

[Huw Powell]

> Turns out the fitting looking thing is just where the rod for the sender
> goes throuth.  Sender is shot though, so I'll start there.

So you found the vent attachement to the tank?

> Puzzled as to where the vapors are coming from.  It is particularly bad just
> after filling the tank.  I'm not finding any visible leaks thankfully.
> There may be a problem with the venting somewhere, I am not seeing it, as
> everything looks intact when compared to the diagrams.

Basically, the simplest set up for the vent is from the tank to the 
gravity valve (closes if car is flipped...), via the long whitish (or 
clear?) plastic line to the charcoal canister.  There is usually some 
PCV interference in this connection, to draw fumes fromt the CC and the 
tank into the combustion process.

Of course, you may have a leak elsewhere... old fuel lines are prone to 
pinholing under the rubber fittings that secure them, for instance.

Good luck finding the source!

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/