Car won't let me pump gas
Pressure builds up and triggers the "it's full" cut-off on the pump. For some reason Infiniti's design builds more pressure than other cars.
Solution -- Pump slower -- from the beginning -- to avoid the pressure build-up. If you go too fast and it builds up, wait a bit and then resume pumping, but slower. You need the pressure to go away and then you need to make sure not to re-trigger it.
Solution -- Pump slower -- from the beginning -- to avoid the pressure build-up. If you go too fast and it builds up, wait a bit and then resume pumping, but slower. You need the pressure to go away and then you need to make sure not to re-trigger it.
This sounds right to me.......
I have the same problem with my 03 G35, Havent had the same Problem with the G37, normally I would take the nozzle out and put it in and out and mess with it, and it would let me put more gas, This usually solves the problem for Temporary until you go to a Dealer
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From: Portland, Maine
Pressure builds up and triggers the "it's full" cut-off on the pump.
Solution -- Pump slower -- from the beginning -- to avoid the pressure build-up. If you go too fast and it builds up, wait a bit and then resume pumping, but slower. You need the pressure to go away and then you need to make sure not to re-trigger it.
Solution -- Pump slower -- from the beginning -- to avoid the pressure build-up. If you go too fast and it builds up, wait a bit and then resume pumping, but slower. You need the pressure to go away and then you need to make sure not to re-trigger it.
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Joined: Nov 2007
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yep, it's happened on my 91 civic, my Z when i had it, and my girl's mazda 3 and her old focus. I'm sure it'll happen on my G37, too. This is all usually at the same gas station. i wouldn't say so much that it's the car but a combination of the car's fuel neck design and the pump. Pumping slower does help so the pressure doesn't build up.
its one of two things. If you were having this problem at only one station i would say its there pump. but i am sure you tried other ones. The problem is there is a vent hole in the fuel system that allows the air to get out while filling. Some times if the pressure gets too high too fast the hole closes up and bam your fake full. My fathers Porsche turbo has this issue sometimes. He will be filling and bam after a few gallons it stops and wont let him fill anymore. The dealer replaced the vent system but the problem still happened. So he had to change his pumping habits. You need to pump slower. It should kill your problem...
its one of two things. If you were having this problem at only one station i would say its there pump. but i am sure you tried other ones. The problem is there is a vent hole in the fuel system that allows the air to get out while filling. Some times if the pressure gets too high too fast the hole closes up and bam your fake full. My fathers Porsche turbo has this issue sometimes. He will be filling and bam after a few gallons it stops and wont let him fill anymore. The dealer replaced the vent system but the problem still happened. So he had to change his pumping habits. You need to pump slower. It should kill your problem...
ok but most auto pumps have different settings. i.e. most stations i go to have like 4 different levels of auto pump...
Really? Either I never Noticed this (DOH!) or where I go they dont have it, will keep this in mind next time, but its not like I have had this problem yet
Nothing to do with a Sensor in the Car
It has more to do with the shape of the tank, and the speed of the pump.
Read this:
Why do Gas Pumps shut off mid-fill? It happens because as the fuel goes into the tank it splashes and bubbles. As the tank gets closer to being full, the displacement caused by the bubbles forces the gas to go up the pipe that feeds the tank and triggers the "full" switch on the pump nozzle. This is similar to if you are filling up a cup of cola at a restaurant, you have to wait for the fizz to die down before you can put that last 1/4 in.
Now this:
Automatic shut-off design
As gasoline flows through a nozzle, it passes through a venturi that creates a vacuum. This vacuum is bled off through a tube inside the nozzle spout. Turn a spout over and you'll see the sensing hole that connects to this tube. Look inside the spout and you’ll see this connection.
As gasoline flows through the venturi, the air is being sucked in through this sensing hole, through the tube and back up to the venturi. So as gasoline is flowing out the nozzle, air is flowing in the sensing hole (bleeding off the vacuum), getting mixed into the gasoline at the venturi and moving back out with the gasoline. Everything is in balance.
When the car's tank is full, the level of gasoline rises in the fill pipe of the car and covers the sensing hole. The flow of air is effectively shut off and the venturi sets off a chain reaction in the automatic shut-off portion of the nozzle. As the vacuum in the venturi area builds, the diaphragm (which is connected to the venturi) begins to sense a higher vacuum. Once this vacuum reaches a pre-set level, the diaphragm moves, causing the nozzle to trip off. We refer to this as an automatic shut-off mechanism. Once again, everything is in balance.
Read this:
Why do Gas Pumps shut off mid-fill? It happens because as the fuel goes into the tank it splashes and bubbles. As the tank gets closer to being full, the displacement caused by the bubbles forces the gas to go up the pipe that feeds the tank and triggers the "full" switch on the pump nozzle. This is similar to if you are filling up a cup of cola at a restaurant, you have to wait for the fizz to die down before you can put that last 1/4 in.
Now this:
Automatic shut-off design
As gasoline flows through a nozzle, it passes through a venturi that creates a vacuum. This vacuum is bled off through a tube inside the nozzle spout. Turn a spout over and you'll see the sensing hole that connects to this tube. Look inside the spout and you’ll see this connection.
As gasoline flows through the venturi, the air is being sucked in through this sensing hole, through the tube and back up to the venturi. So as gasoline is flowing out the nozzle, air is flowing in the sensing hole (bleeding off the vacuum), getting mixed into the gasoline at the venturi and moving back out with the gasoline. Everything is in balance.
When the car's tank is full, the level of gasoline rises in the fill pipe of the car and covers the sensing hole. The flow of air is effectively shut off and the venturi sets off a chain reaction in the automatic shut-off portion of the nozzle. As the vacuum in the venturi area builds, the diaphragm (which is connected to the venturi) begins to sense a higher vacuum. Once this vacuum reaches a pre-set level, the diaphragm moves, causing the nozzle to trip off. We refer to this as an automatic shut-off mechanism. Once again, everything is in balance.
Last edited by peterbanks; Dec 7, 2007 at 08:43 AM.
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Thanks Peterbanks for doing what i was planning on doing yet never had time. This discussion about the sensor in the car being faulty was driving me bananas. This should shut down this silly thread once and for all