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Re: Quadrajet 4MV
Apologies wrenchbender. You've got it backwards. Rod from thermo-coil pulls downward when cold which closes choke plate when you step on the pedal. When it starts vacuum pulls the choke open using the pulloff pot. Amount it opens is controlled by the bent arm hooked to the slot in the pulloff. When coil heats up rod pushes upward and when you tap the throttle it will kick off the high idle cam.
OP says it won't work unless used manually. I suspect thermo-coil or linkage rod popped off.
A pic will tell a thousand words.
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