Originally Posted by NEEDFORSPEED
not for emissions as far as i know.will probably be corrected if im wrong lol, its just for the enviroment
ie on overun when not on throttle the solonoid will open drawing the vapours from tank into the inlet to burn rather then vent to the atmosphere ??? 
just run a pipe elsewhere away from exhaust/heat etc if your gettin rid
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Then surely the car will rev on its own when your changing down gears to slow down at a junction?
