A few weeks ago I slaved over a nasty gas tank and replaced all my vent
hoses etc.  Now after a fill up or two with no problems, I  have to trickle
the gas in or get a really gas-soaked left hand that's squeezing the pump
handle, when the auto shut-off clicks and then a big belch of gas comes
back up the filler neck.  Any ideas on this one. TIA

Dimwitted Moose and Flying Squirrel