Hey C...
So it sounds like the AAP is OK. So... I think you will find when you pull the carb that float valve is stuck open because the needle is not closing its orifice, or the float is corroded and full of fuel, and won't float.
If the float won't float it won't shut off the fuel. The fuel pump floods the float bowel quickly and basically floods the venturi and stalls engine with excessive fuel.
Please let us know what you find.
Gnarls,.
