I put on my newly rebuilt carburetor the other day and noticed this thing 1460830766149.jpgwas dangling on by almost nothing

and now, after driving my truck around more, it came off completely. I have a service manual and I can't seem to figure out

exactly what it is I think it's the air control valve based on the diagrams in my service manual but I can't find any picutures of it

and all the auto parts stores in my small town can't even get a parts number for it. I was hoping one of you guys could help me

out here. My truck is a 1985 Power Ram 50 2.6L.