At 06:51 PM 8/26/2012, neil n wrote:
>thanks David. Thought if purge valve failed fumes might get into
>intake via the larger hose from the purge valve.

Oops, I'm sorry.  That's the actuating line that has the tiny
orifice.  But the main suction line is upstream of the AFM, which
means that with the engine not turning any fumes will fill the filter
box, pass through the filter and fall out the drain holes in the
bottom.  Again, a volume that will be cleared in a couple revolutions
of the engine.

>but maybe my logic is wrong? The purge valve failure mode is closed?

Dunno if it has a standard failure mode.

Yrs,
d