I believe that I have problems with either my charcoal canister or valve.
The tank has a "donk" sound shortly after shutting off the engine when it is
probably depressurizing. I also here a whoosh sound when removing the fuel cap.
I had an earlier post on this and one member suggested checking the vacuum
line  that came from the fuel pressure regulator. This is in good condition.
Does  anyone have any way of testing the canister? Bentley has some basics on
testing  the valve (which I have yet to locate). I am also a bit confused as the
bottom  of the canister should lead to the air cleaner housing (a right angle
fitting on  the top with a hose going to the canister). My vehicle does not
have this hose  coming from the fitting. Anyone have any ideas on testing or
where the valve is  located or other possible locations for this hose that
Bentley says should go to  the air cleaner housing? Thanks.

David Clarkson
90 Westy (244k)

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