filling up your gas tank

[bigfosty]

On my 75 it takes about 10-15 minutes to fill just one of the tanks. I don't even bother with the other one by the time I get the first one filled. I have found one station that I can set the pump on the first notch and if I hold the pump in the filler upside down and push with alot of pressure it won't spill out, but most gas station I can't even set the pump on the first notch. Anyone else have this problem? It seems that it's just the design of the filler neck that causes it, any solutions?

[lowbucktruck]

Yep, I have the same problem filling up my tank on my '73 C20 (fleetside, no gas filler door).  Can't even set the pump handle lock at all, have to do it manually and pump the gas slow.

[dumbucket1]

I learned along time ago with a couple 73-87's I had that did this to put the nozzle in upside down and it would pump fine, maybe it will work for you too.

[Unofficial]

Wow, I have this exact same problem on my '87 fleetside, but I never brought it up because I thought I was the only one, lol. I guess I'm not alone. I'm going to have to try the upside-down method.

[73c10Shorty]

You can add me to the list... I have the same problem. I too would like to know if anyone has a solution.

[frogman68]

I was thinking something with the Breather Tube but too many have this.

Thinking the pressure kicking the pump off

[Stantonss]

Same problem here... Plus my truck is so low and I'm 6'2"-6'3".... I dread having to fill it up. I was complaing about this the other day. Maybe when I get my new wheels it won't be as bad.... But yeah, it kicking off is a pain in the butt.

[ccz145a]

The problem is the backsplash feature on the nozzles are so sensitive anymore, probably some enviro rule was mandated. This happened a few years ago because that when it started happening to mine.

[levisjohnson]

In a gas pump handle you have two valves: the main valve, which is actuated by the handle you squeeze to make the gas flow, and the check valve, which lets gas flow out but won't let anything back in again to reduce fire hazard. In the seat of the check valve you have a little hole. To the backside of this hole is connected a Y-shaped tube. One branch of this tube runs down the nozzle and exits at the tip while the other runs back to a diaphragm connected to a release mechanism on the main valve. When you squeeze the gas pump, gas running past the hole in the check valve sucks air out of the Y-shaped tube.  As long the end of the Y-shaped tube exiting at the spout is unobstructed, air is simply pulled into the tube and nothing much else happens. However, as soon as the gas in your car's fill-up pipe gets high enough to cover the end of the tube, a partial vacuum is created which yanks on the diaphragm, releases the main valve, and shuts off the gas. If the gas happens to be especially foamy one day, it may actuate the release mechanism prematurely.  It may be because of the angle of the spout and it is creating foam in the neck and covering the tube.  it is on the bottom of the nozzel so by turning it upside down, no foam or gas touched the tube to activate the cut off.

Hope that's not too long but that's the reason why.

[frogman68]

Simple solution move to a state that has Full Serve gas stations. Let them deal with it lol

[VileZambonie]

A breather will help but it's even worse on the older trucks like 73-76. I hate pumping fuel into my 74 and same deal, you have to kneel down to pump it unless you are 3 feet tall. It's quicker to fill a gas can then pour it in, no joke.

[Captkaos]

None of mine do this.  My 73 did, but I found that if you don't stick it in the hole to far it works far better.  The fuel splashes back off the curve if you put it in there all the way.

[eventhorizon66]

I fill mine full blast, no problems.  Sometimes it will stop on me at first, but I give it another try and it works.  I don't see how this information helps anybody, so I guess I'm just bragging (but I'm not spending any more than 3 min at the pump ).

[123 pugsy]

I've found that its the rubber hose. Its such a tight bend there is usually a flattened spot in the hose.
I went to auto parts place and picked out a rad hose with the with the right bend and larger inside diameter (I believe there are 2 different sizes at the filler neck and tank) and cut the piece out of that and was good to go.
I've done it on 2 fleetsides and astepside.

[Unofficial]

Like I said, I have this problem, and I'll have to try the upside down method, but lately I've been holding it about 3/4 of the way in and in the upper left corner of the opening when the filler door is open. It usually works pretty well.