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Old 01-25-2015, 04:44 PM   #15
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Originally Posted by CampingCajun View Post
That is not normal & it isn't a good idea to have the opposite fuel cap off. You should see if the fuel tank vent is plugged or crimped.
Any idea where the vent line is? Under the coach?

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Old 01-25-2015, 05:38 PM   #16
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The filler tubes in our rig are very shallow angle, so foaming back is always a problem. I sometimes have to go very slow, even though I have large truck-sized filler tubes. Once in awhile I have to open the other filler to get any fuel at all, but you do have to be very cautious about running fuel out the other side. Even a very slight tilt can be enough to do it.

As an alternative, try fueling from the other side, using the satellite pump (most truck lanes have them).

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Old 01-25-2015, 06:54 PM   #17
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Originally Posted by jondrew View Post
Any idea where the vent line is? Under the coach?
Look on top of the fuel tank. There should be a rubber hose coming off the top & dropping down the front or back side of the tank. Mine drips off the front & the end is on the curb side of the fuel tank.
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Old 01-25-2015, 07:04 PM   #18
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Originally Posted by jondrew View Post
I could see fuel foaming up thru the filler tube and slowly going back down.

'Never noticed foaming being associated with having the other side closed.

I think you simply found a sweet spot of nozzle velocity, existing fuel depth, temp, humidity, etc. You will probably never be able to duplicate this again.

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Old 01-25-2015, 07:58 PM   #19
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Our MH fuel tank causes the nozzle safety back-pressure device to trip a lot when I first begin fueling. It is caused by the design of the tanks filler neck. About 4" in from the cap lock in the opening, the tank makes a 90 deg. turn to the stern of the MH. That happens whether I'm using a truck pump nozzle or auto-diesel nozzle. Frustrating at times, but I never remove the other fuel cap. Check out what remediating a fuel spill to EPA standards costs. The cleanup(over a certain size) must be performed by licensed firms, not a private individual.

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