@Turbo4whl, @K5ride, Yeah, I see it in the diagram. It's a glorified EPA suction thingamajigger to keep unburnt fuel vapors from the air. And we sure wouldn't want any unspent fuel vapors, upon deceleration escaping into the air either, now would we? You have to know I have a deep dislike for anything coming from the EPA. That includes excess hoses, nickel size valves rerouting vacuum to some kind of catch can, triple screens, and filters, and any other kind of valve, or hose going to a thing that doesn't have anything to do with fuel economy or power, supposedly keeping us all healthy because of it, thus saith the most high government! I want them to stay out of my carburator and where or what my fuel goes or does. Yeah @Kevin James, take that whatever it is off and when you go in for inspection put it back on. Deceive the government? You dang right! Move to Louisiana and you can drive your truck any way you want.