On the USA model the bottom canister hose vents into the fender wheel and in this fender well is the air intake for the engine.
I think that if you live in a hot climate, the evaporative emission system can not be handled by the "normal" system. So the overflow or extra vapors goes into the engine air intake and burn in the engine.
It helps to keep our planet green.
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SuperbVehicleXtraordinary
Proud sponsor of a 1992 SVX.
