This may sound stupid - but - I'm having one heck of a time filling the gas tank on my 2008 Holiday Rambler / Ford E450 --- It sometimes takes 20 mins. to fill up because the pump nozzle keeps shutting off, like the tank is filled -- so I have to reposition it and really slow down the gas flow to keep it running -- What am I doing wrong ??
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Not an uncommon problem, take it in for a service trip. Can be a few different things like non-proper or working venting of the fuel tank, kink in the fill hose or ?
Most motorhomes have quite a long filler hose from the nozzle opening to the tank, and this hose doesn't have very much drop. As JVJ says, there may be a kink in the fill hose, or more likely a sag. The fuel collects in the sag and backs the vapors up to the nozzle and causes it to shut off.
If you can climb under the back of the motorhome, try to follow the filler hose and see if there is a sag. You may be able to straighten out the sag and support the hose by attaching it to something under there with some zip ties.
You're not doing anything wrong, I had the same problem with my rig. The problem was the vent host at the filler end had a large "J" shaped dip it in which caused fuel to settle in the dip. I shortened the vent hose by about 6" and took the bend out of it. Problem solved.
I have the same problem, but mine has to do with having 2 tank fillers... sometimes I have to open the opposite on to allow it to vent. It is a real pain in the butt too. You might have that too. Mine is in the shop now and I forgot to put this on the list, thanks for the reminder... i'll call this this a.m.
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