Join Date: Jun 2009
Location: Québec, Canada
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For starters, keep in mind that in cold weather, it is a good idea to keep your tank relatively full (overnight, at least). This will minimize moisture condensation in your tank.
I don't know if condensation could be so voluminous as to block your filler or breather tube (a big T drop at some point would have facilitated that), but maybe some of our midwest or high plains US members could comment on that. If it is, it would be prudent to add some gas line antifreeze (methanol) to adsorb moisture and insure you don't develop ignition problems. As a Quebecois, you probably know this already, so excuse me if I am saying something you already know well.
Some cars are quite sensitive to the positioning of the gas nozzle in the filler neck, but I have not noticed this in my Milly. But with your temps, perhaps the hoses on the pump are so stiff as to cause a funny positioning. ?? Good luck.[/b]
A few questions to start out with.
Is this the first time this has happened?
Have you ever been in a collision where that area was affected?
Did you try another pump/gas station.
The gas pump's nozzle shuts off via a differential in pressure (venturi affect). There are no fancy sensors or complicated parts in the nozzle housing. This doesn't mean they don't go bad but 98% of the time it is your car that is the culprit.
The underside of the nozzle at the very tip is a small vacuum sensing port. If this comes into contact with bubbles or fluid it will trigger the pump to shut off. It's as simple as that.
A few things can happen. If your gas is especially foamy (through additives or temp related) the bubbles in the gas tank will rise enough to hit the tip of nozzle and flip the shut off switch.
If your filler hose is kinked or bent the fill rate will be slower than the pump rate and you will get a build up of gas that will prematurely shut the pump off.
If car is parked on an incline while filling you will also be susceptible to the above.
If you find that you see a lot of foam in your gas tank drive your tank to empty and refill at another gas station. It will be beneficial to drop in some gas line antifreeze or injector cleaning at the same time of refilling too.
Next time you fill up pull your nozzle out about 1/2" from where you normally insert it. This will remedy most problems.
If all else fails rotate the filling nozzle about 45 degrees while you fill so that the vacuum sensing port is not in the direct line with the tank fill tube.[/b]