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Old 08-30-2004, 01:24 AM   #1
asiangear
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Gas Pump stops when tank is not full

I notice sometimes when I fill up at my local Chevron, the gas pump will stop when the tank is not even near full. For instance it would stop at 5 gal from filling a near empty tank. Somtimes it stops around 12 gal. This doesn't happen all the time and I used different pumps each time to make sure that it wasn't a faulty pump. Any clues to this mystery?
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Old 08-30-2004, 01:33 AM   #2
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May have something to do with how much pressure the pump exerts as it fills your tank. Do you press the pump trigger fully (highest pressure)?

These things have an auto shut-off feature that gets triggered even when the tank is not full yet. Happens to me often that even if the fuel sloshes around in the filler tube (or pipe), the pump stops. I found out then after this instant, pressing the pump trigger lightly will resume the filling...sometimes for a lenghty period before the tank is filled. You can eventually fill your tank to the brim.
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Old 08-30-2004, 01:46 AM   #3
asiangear
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Quote:
Originally Posted by iastute
May have something to do with how much pressure the pump exerts as it fills your tank. Do you press the pump trigger fully (highest pressure)?

These things have an auto shut-off feature that gets triggered even when the tank is not full yet. Happens to me often that even if the fuel sloshes around in the filler tube (or pipe), the pump stops. I found out then after this instant, pressing the pump trigger lightly will resume the filling...sometimes for a lenghty period before the tank is filled. You can eventually fill your tank to the brim.

Thanks for the tip. I'll give that a shot next time.
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Last edited by asiangear; 08-30-2004 at 02:04 AM.
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Old 08-30-2004, 11:34 AM   #4
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air pocket

Hey. it's an air pocket problem....I think all BMW's have that problem at the pump. The rubber sleeve that covers the pump neck will build up an air pocket cause the sleeve doesn't fully cover the gas nozzle, so it sets off the sensor on the pump to stop sending fuel through. I don't know of anything that can be done about that, just have to make sure the pump is inserted all the way into the nozzle.

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Old 08-30-2004, 03:23 PM   #5
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Quote:
Originally Posted by asiangear
I notice sometimes when I fill up at my local Chevron, the gas pump will stop when the tank is not even near full. For instance it would stop at 5 gal from filling a near empty tank. Somtimes it stops around 12 gal. This doesn't happen all the time and I used different pumps each time to make sure that it wasn't a faulty pump. Any clues to this mystery?
I had a similar problem when I filled up my car as well. My car would only take 0.5 litres before kicking off each time when I know my tank was 1/4 tank empty. (Trying to top up when the gas went down in price) I tried lifting the nozzle a little out, I tried moving that rubber flap that is on the nozzle to let air in, I tried various amounts of pressure in squeezing the trigger all with no success.

I found that if I let the tank go down to half full, I could fill it up another 1/4 tank. After a while of driving and repeating the half tank fill for a few more times, my car finally allows me to fill up the tank. Don't know why this worked for me.
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Old 08-30-2004, 04:14 PM   #6
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not my car but then again, i dont shove the nozzle all the way in
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Old 08-30-2004, 04:21 PM   #7
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I've never had this problem
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Old 08-30-2004, 04:44 PM   #8
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I had this issue just the other day. Again.


...so far though, it's only at Shell stations.
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