How gas pumps know when to turn themselves off? (Page 1/2)
theogre SEP 17, 04:19 AM
See https://www.youtube.com/watch?v=fT2KhJ8W-Kg
He cut out a nozzle and more to show how auto shut off works.

Why do nozzle hate some cars?
Assuming the Nozzle works 100%... (Many simple don't because gets beaten to death and nozzle easily trips off.)
All Nozzles Assemblies work about the same but actual nozzle tube can be very different.
Example: Many States require Stations to have Coaxial Nozzles and Hoses that Suck Fumes when filling a car and not shown in above video. Many of these had Bellows over the nozzle in the past but only have extra holes and often longer then normal nozzles. (If the markings on hose haven't faded or worn off, Coax hose is labels as such.)

Also the Filling Port in a vehicle can work against the nozzle...
Examples:
Car Fill ports has some type of vent "active" for filling a car and may have problem with Fast Fill Station Pumps no matter what nozzle used because can't get fumes out and gas in fast enough cause auto off feature a pain in the ass.
Some Fill ports bend more/less at the top and may party block or output flow hits the wall spaying the nozzle vent hole and fake trips off.

In either case could try slowing the flow (Most nozzles will allow variable speeds regardless of trigger lock if has that.) or turning the nozzle a little to the side but must watch/listen so still will auto shut off.
If you slow the flow too much then auto off may not work at all. How slow the auto off works depend on nozzle at any fill up. Even two nozzles at same station can be different here.
Listen? In many cars, the sound of fuel flow changes just before the nozzle should shut off.

------------------
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(Jurassic Park)

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Jake_Dragon SEP 17, 02:41 PM
2007 Mustang and it hates all modern pumps. I have to turn the handle upside down or it will keep shutting off.
Notorio SEP 17, 11:56 PM
In the People's Republic of California we have the hoses that suck back the fumes. It makes it hard to fill a gas can for my lawn mower (but these will eventually be banned anyway.)
Zeb SEP 18, 09:10 AM
(New Jersey enters the chat)

Wait, you guys have to pump your own gas?
Wichita SEP 18, 10:21 AM
That's a cool video. Thanks for sharing.

I'm one of those confident dudes, who starts pumping the gas, set the handle lock and walks away to goes inside.

Of all my years and miles driven, I have never experienced a failure of the auto stop feature on the gas pump.

theogre SEP 18, 03:23 PM

quote
Originally posted by Jake_Dragon:
2007 Mustang and it hates all modern pumps. I have to turn the handle upside down or it will keep shutting off.

Is more likely something is wrong w/ the car...
Check fill port for anything plugging, pinch areas, etc. even if came new w/ that problem.

Most nozzles exact same or very similar from other Brands haven't change much in many Decades.
Coaxial Nozzles and related parts are Not New either. State or USEPA required stations in A Lot of areas w/ Clean Air "Violations" to prevent vapors at stations in the early 90's or even before that in some places.


quote
Originally posted by Notorio:
In the People's Republic of California we have the hoses that suck back the fumes. It makes it hard to fill a gas can for my lawn mower (but these will eventually be banned anyway.)

Many places stopped installing the Bellows just because of that and other problems but still have "Vapor Recovery" AKA Coaxial Nozzles.

Many still use a "Disk" on the Nozzles but they are more of a Splash Shield to protect you, not a vapor seal.
theogre SEP 18, 03:52 PM

quote
Originally posted by Zeb:
(New Jersey enters the chat)

Wait, you guys have to pump your own gas?

NJ Stations pumps have same nozzles and often have same problems. But public can't beat the crap out of the equipment so often less broken nozzles.


quote
Originally posted by Wichita:
I'm one of those confident dudes, who starts pumping the gas, set the handle lock and walks away to goes inside.

Of all my years and miles driven, I have never experienced a failure of the auto stop feature on the gas pump.

If you do that and have a nozzle fail... Spilling gas often isn't the only thing that can happen... If spill is larger then X amount then You can get huge fines by State "EPA" and others. Many Stations have camera and can see someone spilling fuel then report to cops etc or they can get big fines.

I have seen nozzle failures many times. Also seen many vehicle w/ tank problems and won't backup the flow to shut off the nozzle right or never.
Or vehicle tank leaks even if manages to kill the nozzle.
Jake_Dragon SEP 18, 06:00 PM

quote
Originally posted by theogre:
Is more likely something is wrong w/ the car...
Check fill port for anything plugging, pinch areas, etc. even if came new w/ that problem.



Nope Ford knows about it. In 2005 they had to replace a bunch of gas tanks. But as the gas pump nozzles change the issue resurfaced for the 2006 and 2007 Mustangs.
Rotating the nozzle will let you fill the tank without having to stop and restart several times. I never had this issue until I moved to CA where the pumps have a new nozzle design to seal to the filler tube.
Its not just the Mustang There are other cars that have similar issues.
Wichita SEP 18, 08:55 PM

quote
Originally posted by theogre:

[QUOTE]Originally posted by Zeb:
(New Jersey enters the chat)

Wait, you guys have to pump your own gas?

NJ Stations pumps have same nozzles and often have same problems. But public can't beat the crap out of the equipment so often less broken nozzles.


quote
Originally posted by Wichita:
I'm one of those confident dudes, who starts pumping the gas, set the handle lock and walks away to goes inside.

Of all my years and miles driven, I have never experienced a failure of the auto stop feature on the gas pump.

If you do that and have a nozzle fail... Spilling gas often isn't the only thing that can happen... If spill is larger then X amount then You can get huge fines by State "EPA" and others. Many Stations have camera and can see someone spilling fuel then report to cops etc or they can get big fines.

I have seen nozzle failures many times. Also seen many vehicle w/ tank problems and won't backup the flow to shut off the nozzle right or never.
Or vehicle tank leaks even if manages to kill the nozzle.[/QUOTE]

Eventually I won't care, because we will all be driving electric vehicles soon anyways and this becomes moot. In fact they are building convenience stores without gasoline pumps now, but EV stations. Within 10-years, most all new vehicles will be EV. So this is like the phone booth. It's on the way out.
maryjane SEP 19, 07:52 AM
So I should get me a modern gas pump now, for when they become collectors' Items?