Six months ago my 2001 Ford Taurus, 3.0L DOHC, 130K mile, fuel tank was cleaned to remove charcoal pellets inside tank, replaced fuel pump and filter, and flushed fuel lines. This solved a fuel starvation problem. I didn't know until now that the carbon pellets came from the EVAP canister. I noticed after topping off the tank that fuel was leaking from the air purge vent valve side of the vapor canister. I took it out of the car and found gas inside the canister. Do you know why gas would find it's way back into this system and what my next step should be? Could this be my original cause for carbon pellets inside my gas tank? I'm not getting a warning light condition.