[Bobcat]

X2 on Patrick`s answer . I found out about air bleeds and ethanol based fuels summer before last .... had the exact same problems you did , and did the same tests you did with the same results . About once a month , I just spray the bleeds before going out as a preventive measure . You also might want to start using Star Tron additive in your fuel to negate the negative effects of the ethanol based fuels .