2002 Ford Explorer Will not start

If I drive my vehicle for lets say 45 minutes on the highway. Stop at a gas station. Turn the mortor off. 5 to 10 minutes try and restart it. It will start for 1-3 seconds and die like my old truck would when a carburator would flood. Try starting it again and will not start just like again a flooded carburator use to. I have to wait 30 to 40 don't start it and then try again. Its runs fine. Last night for the 20th time in 8 months it didn't start for over 2 hrs. I took it to a local dealer and they couldn't find anything. Is there records of this happening to other vehicles.