Re: Gas smell
the older ones go to the intake, yes, the newer ones use a vent valve that is triggered by the ignition, no line to the intake. you could get a pulse relay from a place that sells alarms and set it to open the valve for 3-30 seconds when you turn the ignition on.
charcoal canisters are meant to handle fumes from the tank, not the carb. i remember this as a kid, walking around the thorofare parking lot, in the summer all you smelled was gas from the car tanks vented caps. charcoal canisters are not really necessary (except for california I guess) except to keep from smelling gas in your garage.
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