Out of the blue, it took me over 10 minutes to fill up my '05 LS430. I could get about a half a pee stream in without it cutting off the pump. And my tank was practically empty. Now, I only drive this car about once/month with it sitting so long without cranking that the battery has to be charged...if that helps in diagnosis. Scotty Kilmer told me on his live YouTube that the first thing I should check is the "Evaporative Canister Vent Valve." After that I should go to the dealer. What do y'all think?