Air:Fuel Help. Cannot Get it Rich

AJ/FormS said

Before you blow,look hard, real hard. Take the float valves out and look behind them. Remove the inlet pipe, and the inlet fittings, and

Waitaminute
what are the chances you got a load of alcoholized fuel?

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You'll have to pardon my ignorance, but I've never heard of alcoholized fuel, or if I have, i don't know anything about it.
I've been fighting this for a few track events, and have gone through a couple different jugs of fuel. I believe a couple different jug fillings maybe from the same station, but perhaps not spread out long enough that it would be a different load from the station.