[s-cars] EVAP Cannister fuel system questionz

[S4audinut at aol.com]

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Anyone ever had an evap cannister give up the ghoat/get plugged? What are the
symptoms. I seem to have excess tank pressure and cant get to the bottom of
it as it is causing fuel problems. Also I have a hiss (I beleive is related)
when car is running which is heard most clearly by right rear tire in
wheelwell?? Any ideas, suggestions. I will pull the inner fenderwell if I
have to, but would like any experience. I guess I should just blow thru the
lines to see if clogged?? If this isnt it, does anyone know of a way to test
the rollover valve w/o rolling it or pulling the tank (I would seriously like
to avoid doing this in my garage)? Pls. help, this problem seriously
threatens my chances of doing the dyno dance this Sunday in Virginia at the
Nationals.
Rod