Gas nozzle keeps shutting off when filling tank

[woodytwo]

Not sure if it is a problem needing to be fixed or ?????. But sure is frustrating. When filling my gas tank I have to have the gas nozzle set to slow or very slow or the gas nozzle does an auto shut off. Is this just my m/h or do others have this problem as well? If it is only my m/h with this problem, what the fix?
woody
2005 LY 30

[rmkrum]

Check for obstructed air vent in your fuel tank or immediate connections to it. Had that issue in a car with a twisted vent hose. Fuel signed up in the full tub instead of venting air out to the top of the fill tube where the gas nozzle can vent air out. Look for a crimp in a hose.


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[AWCHIEF]

It is the nozzle not your vehicle. Let the attendant know about it.

[martin300662]

Most of the older MH do it. The original tanks weren't vented and used a vented cap....

There are several threads in it and I chased for a while thinking it was a kinked filler pipe. Modern pumps just plane deliver too fast for old non-vented tanks

[richinny]

it might have an anti-siphon spring in the fill tube to prevent fuel theft.

[nrgtrakr]

Both my F250 and RAV4 do the same thing. The F250 is mostly diesel bubbles in a crooked tank filler neck. The RAV4 is all crooked tank filler neck, about of the 1/8 tanks worth.

[garypk]

Mine is older than yours & it doesn't ever do it. Nor should it. if it happens at different pumps, look for a kink in the filler hose or maybe a clogged vent . Does it happen when tank is very low? If it does I'd look hard at the filler.

[Airstream12557]

My 2004 Land Yacht did it on some pumps but not on others. It is fustrating when you have to hold the nozzle to fill the tank! I always thought it was a pump problem.

[woodytwo]

Thanks for the info.
Seems to occur at most stations. Some are worst than others. (Flying J) I can't remember when it didn't happen.
So does the 2005 have a vented tank???

[Drathaar]

Try setting the nozzle on its lowest setting. My Ranger often clicks off if the nozzle is at max flow.

[woodytwo]

Originally Posted by Drathaar

Try setting the nozzle on its lowest setting.

I would be happy if I could set it at the lowest setting. But it shuts off. I have to hold onto the flow control below the lowest setting.

I understand that air has to get out for the fuel to get in. So if no air vent then I would suspect the filler hose going into the tank has a kink or is too small. But workhorse wouldn't have let that happen????
So maybe a clogged vent???
Other than that, maybe what I have is what I was supposed to get???

[woodytwo]

May have stumbled upon the solution.
Did a google search and found several RV forums with similar posts.

Problem may be with the vent tube. Apparently all/most chassis have one. comes out of the top of the tank runs along the filler tube to a "T" near the top of the filler tube. overfilling can cause gas to be in the vent tube that gets trapped in a type of "P" trap by a low spot in the vent hose. Gas cannot drain back into the tank and air cannot go up the vent so air goes back up the filler tube causing auto shutoff to click off.

Solution seems to be to realign the vent tube to ensure there are no low spots and drain away gas in vent tube. Several owners did this and the problem went away.

Seems reasonable to me in that I believe that the gas tank is right up between the main chassis rails and filler and vent line would have to be horizontal at some point to fit under the floor and get to the top of the gas tank.

I'll have a look and follow up on findings later.

[garypk]

I used to service pumps & Rav 4s are notorious spillers. Seems the tank is pretty flat w/ the filler.

[KrisE MN]

play with angle if you don't have nozzle in far enough or angled too straight it can cause problems

[idroba]

Originally Posted by woodytwo

May have stumbled upon the solution.
Did a google search and found several RV forums with similar posts.

Problem may be with the vent tube. Apparently all/most chassis have one. comes out of the top of the tank runs along the filler tube to a "T" near the top of the filler tube. overfilling can cause gas to be in the vent tube that gets trapped in a type of "P" trap by a low spot in the vent hose. Gas cannot drain back into the tank and air cannot go up the vent so air goes back up the filler tube causing auto shutoff to click off.

Solution seems to be to realign the vent tube to ensure there are no low spots and drain away gas in vent tube. Several owners did this and the problem went away.

Seems reasonable to me in that I believe that the gas tank is right up between the main chassis rails and filler and vent line would have to be horizontal at some point to fit under the floor and get to the top of the gas tank.

I'll have a look and follow up on findings later.

It is common to have the vent line slip, sag or otherwise develop a problem so if gas gets in it, it forms a trap blocking the air from being able to be vented from the tank. On my 310 I found that the original ties which held the vent to the large fill line had slipped allowing the vent to not ride on top of the fill line, form a pocket and prevent a rapid fill. Once I corrected that, the problem went away, so I would say this well could be the issue on yours. Route the vent line so it is a always going down to the tank so no liquid can accumulate in it.

[comprose]

Originally Posted by woodytwo

So does the 2005 have a vented tank???

How about a 1999 30' Land Yacht MH, does it have a vented tank? I have the same issue and always afraid of topping off and spilling gas all over the place.

Mike

[idroba]

All gas tanks car, truck, diesel etc.(as well as water tanks in RV's) have to be vented so the air or fumes in the tank can come out as you fill the tank. The liquid pushes the air or vapor out, otherwise it cannot go in.

[woodytwo]

Follow up

Checked vent tube and it looked in the right location.

just finished a 1500 mile trip and low and behold no problems. I was able to use the fuel flow stops. If anything was different, it may be the fact that I didn't put the nozzle as far into the filler pipe as I normally do.

[kenajen]

Woody, My 2005 does the same thing, but not at all times. If you find that it is the vent tube let us know. I have seen this thread on this forum before but have never chased down the problem myself.