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Re: q-jet problem
10-14 psi is really high fuel pressure for a Q-jet. Usually 5-9 psi is normal. (per my Haynes manual)
Excessive fuel pressure may mean the needle and seat are unable to shut off the fuel flow when required, resulting in a over-rich condition.
However, your problem is not related IMO.
I suspect the secondary metering rods are not adjusted properly or are disconnected.
These rods are lifted up off their seats when the secondary air doors (not the secondary throttle blades) are opened.
IMO whoever rebuilt the carb made a mistake
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