Varajet Secondary Air Valve Fluttering

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JesseB

Junior Member
Joined
Dec 11, 2022
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Location
Western New York
First Name
Jesse
Truck Year
1980
Truck Model
GMC C1500
Engine Size
4.1L 250 Inline 6
I have a 1980 GMC with a 250 inline 6 with the 2SE Varajet carb.

I see the secondary air valve flapper at the top of the carb flutter open, the throttle blade open, and the secondary metering rod pulled out with but no fuel is being pulled from the fuel well. I did this in neutral when opening the throttle wide open. When driving, it feels like the truck is bogging when the secondary kicks in. Vacuum on the engine measures good, has anyone experienced this before?

Thanks.
 
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