It's a part of Al Gore's top secret carbon equistration program.
Either that or it absorbs the hydrocarbon fumes from our gas tanks
when the engine runs.  Maintain it by making sure all the vacuum lines
are connected and not leaking, and remember that for every car with a
missing canister there are 3 lawn mower gas cans leaking fumes into
our atmosphere.

2009/10/26, Michael Sullivan <sandwichhead@gmail.com>:
> What is the purpose of this?  Any maintenance required?  Thanks.
> Michael in San Antonio
> 91GL AT 'Gringo'
> 73 Beetle
>

--
Chris S.
Disclaimer: "Death and serious injury may occur"