2nd Gen Non-Engine/Transmission fuel tank

[zues]

I put fuel in my truck the other day at a pump that is used to fill super fast. The nozzle shut off and I filled it one more time. Then all of a sudden there was fuel overflowing out of the top. I am wondering if there is a releif valve to let extra fuel out or is there a gasket that needs replacing.

 

[Hemiless]

I may be wrong, as I've never looked closely. But I would bet you have a loose or cracked hose or else as you stated a gasket is bad on the fuel pick-up and level sensor output. The only vent I know of is the one that exits in the filler neck next to the cap. If there is another vent it would have to be higher then the filler to prevent fuel from spilling out when people like myself fill it up to the cap.



Now if you meant by your post that fuel came rushing out of the filler neck after topping off with a high flow nozzle. Then I would reply that this is normal because the tank is trying to burp out all of the air that is being displaced by the fuel flowing out of high flow nozzle. It doesn’t happen on the low flow nozzles because the air vent is big enough to keep up with the flow from these nozzles.

 

[Turbo Tim 1]

Also depending on where you live, alot of places started using K-1 mixed fuel on October 1st which from what I have seen tends to foam alot more causing spill over

 

[y-knot]

I will vote for the combo answer. I to use the very large hoses at truck stops, and they do flow so much that the vent can not keep up, thus giving the big burp. but also the high flow rate makes for alot of foam, so that doesn't help things. I usually try to figure about how much my tank will hold, and when I get to with-in 5 gals. of that figure, I slow way up on the delivery rate.

 

[RT66DOC]

Just for laffs.



Last time I filled up - a truck stop I frequent that has large high flows - a guy with a Ferd P-choke Excursion (Excavation?) was stressing because he was "running on fumes" and the big nozzle wouldn't fit his little fill hole. I sent him down the street to another station that is mainly for cars and, oh yeah, we also have some diesel over there in the corner with a tiny nozzle on the hose. :-laf



So two things come to mind:



1. Size does matter.

2. If you wanna run with the big dogs... Oo.



BTW, I use Y-Knot's approach to filling the tank.

 

[OL RATLR]

If you are using Hi Flow nozzle at Truck stop put your fuel in at half throttle

that way you don't get fuel all over your Rig. Been there done that.

 

[zues]

The fuel came out at the top of the fuel tank. It did not over flow out of the filler neck.

 

[illflem]

Three things could have gone wrong.



1)The o-ring on top of the fuel tank module is shot or the large nut is loose.



2) The vent on top of the module is shot, it should close when fuel hits it.



3) (my choice) There is an auxiliary fuel outlet on top of the fuel module that is usually plugged, the plug may have come off.



All of these problems are probably related to the large nozzle not letting air out of your tank fast enough because the nozzle is blocking it too much of it. The tank is getting pressurized this may have blown the auxiliary plug off.

 

[DDT]

I just installed a flat bed on my truck. I have noticed air being sucked into the tank when I refuel after on the road. I noticed on top of the tank there is a small L-shaped vent, white in color. It does have a barb end for a 1/4" rubber hose. If you turn it and pull up you could possibly get it out with the bed on. There seems to be a ball in it. It was plugged. I cleaned it and put a hose on it, it will be easier to pull the hose off to clean it. My tank does not suck air when I remove the cap. The top of my tank was dirty so cleaning before this would be a good idea. I had trouble with fuel puke but not any more (so far).

 

[radixr]

Has anyone taken out the ball that is supposed to guard against fuel spillage in a rollover? I've been contemplating doing this so I can fill my tank faster at the big nozzle pumps. Any reason to not do this?

 

[Loren]

I took that ball out, but I haven't seen any measurable difference with the pumps I ususally use, which are normal flow. Sorry, I can't help regarding the high flow pumps.



Other than the safety issue for roll-overs, I don't see any reason not to do it. I haven't had any problems.



Loren

 

[Midnite]

Originally posted by radixr

Has anyone taken out the ball that is supposed to guard against fuel spillage in a rollover? I've been contemplating doing this so I can fill my tank faster at the big nozzle pumps. Any reason to not do this?

I did this on my '92, and it helped quite a bit when fuelling with the big nozzles.



Mike