Running rough at 1/2 throttle

[jkcrosson]

I went for a 50 mile ride today in my car. About 15 miles into the ride, I noticed that the car was missing when I went past 1/2 throttle. As the ride progressed, the running got worse.

I have checked for:
Points gap .021
Points Spark white/blue
Timing ok
no loose wires
Drained and emptied carburetor bowl for possible water in Carb.

The car idles fine and runs fine down to the 1/2 throttle point but it goes south after that point. It is worth noting that it had been parked for 3-4 weeks in Alabama heat and humidity. Not a good thing is my gas tank is now sitting between E and 1/4 of a tank closer to E. I think I'm being haunted by ethanol gas. Any ideas.