Big mystery finally solved...and who deserves the prize?

[Rock Hornbuckle]

Originally Posted by Tom Wesenberg

Sure sounds like typical ethanol garbage gas problems. My car does the same thing if I have 10% ethanol garbage in the gas and the temp is 70* or above. When I use the good gas, (which is almost all the time) I never have a problem. Ethanol gas boils in the carb and/or fuel line and causes the lean mixture you've described.

Tom, I think you're on to something there. IYO Could the ethanol coupled with a weakened spark (from decreased current flow) be a contributing factor? Is it possible that this problem is from several factors culminating and disguising itself as a singular problem? Has anyone seen something like this before?