I did some research on this problem and found out that this happens when the evap canister purge solenoid sticks open and the pressure from adding fuel pushes gas into the intake causing flooding. Whenever the car starts and burns the gas, no flooding until the next time the car is re-fueled.
Does anyone know WHERE the evap canister and purge solenoid are located on a 2004 Chevy Aveo? Some cars have it around the engine and some have it near the gas tank. How difficult is the purge solenoid to replace??? Thanks for any help!