[Formulajones]

On the holley it's pretty common to have the rear blades hang up. Sometimes after they are run a while and go through some heat cycles things move around. Sometimes it's apparent right away.

It's an easy fix. You can have a look at the blades and make sure they are centered but most just give the rear throttle blade spring another wrap around the shaft.

https://youtu.be/avRqQZBOxP0