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Is your car a 68-69 or a 66-67 AIR CA car?
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Does the screw have a flat screwdriver slot on the threaded end?
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If so, then it looks sort of like the off-idle air bleed screw that fits into a spot in the throat of these carbs.
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If it's not in place, then you could be experiencing the off-idle richness you describe.
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Happy motoring
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John Dawson
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On 07/31/2026 11:14 AM MDT Andy via RMC-List <rmc-list@corvair.org> wrote:
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I found this laying on the tin next to my left side carb. It is next to a carb top screw for scale. It has a single tiny hole. It is way too small to be a fuel jet. It think it is for an air bleed. This carb goes WAY rich at very low part throttle at road speeds(visible black smoke on that side that incan see in the mirrors). That carb idles fine and otherwise runs great. I can see the cluster dumping gas if I look down the bore and just crack trh throttle open.
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Thanks for looking.
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Andy
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