Well, I think I fixed it! I took off all the vent tubes and released all that pressure that was built up from all this 100° heat we've been havin. I couldn't get the hose off that goes from the filler neck to the tank, but I stuck a magnet down in it and if that metal flap was stuck in there, its in the tank now. But I went to the gas station this mornin and filled it on full blast and it didn't burp up the gas right off the bat like it was doin, it just kept goin right on in!!! I'm so happy!!!!!!