I just bought a 1999 Pleasure Way Class B RV that sits on a 1998 Dodge Ram 3500. After three or four successful fill-ups,

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on the next fill up attempt, after driving about 160 miles on the homeward leg, I could get only 3 gallon in when the gas pump clicked off. The gas was full to the brim of the fill tube and not going down. I drove it home. Some days later I tried again, it took 13 gallon to fill, all seemed A-OK. Any ideas? Next time I might not be only 20 miles from home.