XK / XKR ( X150 ) 2006 - 2014

V e r y slow tank fillup at station

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Old Apr 26, 2016 | 01:58 PM
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Default V e r y slow tank fillup at station

This happened to me at least 4 times in the last 3 years or so in my long driving holidays in Sicily and Italy. Stop at the petrol station, the attendant puts nozzle into tank and has to fill it very slowly as it starts to constantly cuts off, as if it's full. 'Very slowly' as in like 10 minutes for half a tank. On the rest of the stations, all's well. Any ideas apart from not going to Italy? Cheers!
 
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Old Apr 26, 2016 | 02:20 PM
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I have the same problem at certain pumps. I usually just end up trying a different pump or gas station and then I don't have a problem!
 
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Old Apr 26, 2016 | 02:51 PM
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I have the same problem - but only at one gas station here in Coburg/Bavaria and only with Super Plus.

With E10, E5 petrol no problem. The owner told me, that only my car has this problem - a answer you can believe, but you don´t have to.

15 minutes to fill 50 liters, 20 cars with angry drivers behind me and 0 degrees outside, thank you. Never been there after this answer.
 
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Old Apr 26, 2016 | 03:01 PM
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My wife used to have a similar problem with her MB. It turned out to be the fuel overflow/vapor capture tank filling with sediment and requiring replacement. I have no idea if that applies to your vehicles or experience, but I thought I'd put it out there as a heads up for consideration.
 
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Old Apr 26, 2016 | 03:17 PM
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Originally Posted by LoudHogRider
My wife used to have a similar problem with her MB. It turned out to be the fuel overflow/vapor capture tank filling with sediment and requiring replacement. I have no idea if that applies to your vehicles or experience, but I thought I'd put it out there as a heads up for consideration.
To be fair, some attendants did tell me that they had occasional problems with other like cars, not necessarily Jaguars. One time, the station was at an incline and the nozzle was cutting out. I reversed the car round, and it filled with no problem! Not sure how the nozzle cut out works, though.
 
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Old Apr 26, 2016 | 03:18 PM
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I had this problem at 1 station and 1 specific pump. Turns out the nozzle sensitivity was set to low and would shut off the nozzle prematurely.
 
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Old Apr 26, 2016 | 03:18 PM
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What Hog said. The air return vapor line may well be clogged, seen that more than once. Some pumps are more sensitive than others and will shut down but check your line - you can blow it out with a air compressor. On my Porsche I had to hold the nozzle at an angle to get it to flow at full speed otherwise the vapors would slow it way down
 
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Old Apr 26, 2016 | 03:22 PM
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Originally Posted by Leeper
What Hog said. The air return vapor line may well be clogged, seen that more than once. Some pumps are more sensitive than others and will shut down but check your line - you can blow it out with a air compressor. On my Porsche I had to hold the nozzle at an angle to get it to flow at full speed otherwise the vapors would slow it way down
Thanks Leeper and Hog. Will look into it. Where exactly is the air return vapour line?
 
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Old Apr 26, 2016 | 03:44 PM
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EJ - on the Jag I do not know where it is, most often it is right in the filler area next to the cap itself. you'll see a small black hole that is it. In fact if you put your finger over such a hole while filling it will immediately shut off your pump. I have not looked at the Jag yet perhaps someone will chime in shortly with better location advice.
 
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Old Apr 26, 2016 | 06:31 PM
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Originally Posted by Leeper
EJ - on the Jag I do not know where it is, most often it is right in the filler area next to the cap itself. you'll see a small black hole that is it. In fact if you put your finger over such a hole while filling it will immediately shut off your pump. I have not looked at the Jag yet perhaps someone will chime in shortly with better location advice.
I'm not sure where it's located specifically on the Jag but most modern car owners manuals suggest you don't top off your vehicle for this very reason (though few if any bother telling you the reason). Let it fill and when it stops, your done.
 
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Old Apr 26, 2016 | 07:05 PM
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Second on the vapor return line. I had a car where the line linked and it would fuel very slowly. IIn that car the line was internal in the full nozzle and down into the tank. It was damaged during fuel take r&r.
 
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Old Apr 27, 2016 | 01:57 AM
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Ok, from the manual:


FUEL LEVEL VENT VALVE (FLVV)


The main purpose of the FLVV is to control the fill volume of the tank. During filling, vapor is passed via the FLVV to the LVS. The vapor then passes from the LVS to the vent connection via a corrugated tube. The vent connection is connected to the charcoal canister which stores the fuel vapor. During filling, when the tank reaches its full level, the FLVV closes and prevents fuel vapor passing through to the LVS. This causes the pressure in the tank to rise which in turn causes the pump filling nozzle to turn off.


 
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Old Apr 27, 2016 | 06:50 AM
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Originally Posted by ejjbee
Ok, from the manual:


FUEL LEVEL VENT VALVE (FLVV)


The main purpose of the FLVV is to control the fill volume of the tank. During filling, vapor is passed via the FLVV to the LVS. The vapor then passes from the LVS to the vent connection via a corrugated tube. The vent connection is connected to the charcoal canister which stores the fuel vapor. During filling, when the tank reaches its full level, the FLVV closes and prevents fuel vapor passing through to the LVS. This causes the pressure in the tank to rise which in turn causes the pump filling nozzle to turn off.


I agree that this is the way it should work but in some instances with the tank 1/4 full the pump shuts off while filling the tank. My experience with this has been with only 1 specific pump. I only use Mobile fuels and there are 4 stations withing 10 miles of my house. Only one of them and only 1 pump causes this problem. I also notice while looking under the car at the fuel fill line it seems it is smaller in diameter then I normally see and the vent line is about 8-10" below the fill cap.
 
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Old Apr 27, 2016 | 07:16 AM
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Originally Posted by Leeper
What Hog said. The air return vapor line may well be clogged, seen that more than once. Some pumps are more sensitive than others and will shut down but check your line - you can blow it out with a air compressor. On my Porsche I had to hold the nozzle at an angle to get it to flow at full speed otherwise the vapors would slow it way down
Have this an odd time to , any pics of the vapor line , might give it a blow out.
 
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Old Apr 27, 2016 | 09:35 AM
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I have this problem on occasion (including yesterday) but it seems to happen at the same gas station most of the time. I would guess the sensitivity of the nozzles at that station is the cause. I gave up after 1/2 a tank and took off.
 

Last edited by tberg; Apr 27, 2016 at 09:38 AM.
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Old Apr 27, 2016 | 10:05 AM
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The Vapor Line may be one issue. The other issues are very dirty gas filters that are installed at the gas pump itself. Unless the filling station changes the filters on a regular basis on the pumps, it will cause the gas to flow very slow from the gas pump.

This is why the flow of gas may change from one pump to another.
 
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Old Apr 27, 2016 | 11:21 AM
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Don't use that one pump.
I just solved your dilemma!
 
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Old Apr 27, 2016 | 12:46 PM
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Another possibility- glaucoma medication can make it seem forever. As it does falling from ladders.
 
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Old Apr 27, 2016 | 02:53 PM
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I'm old so nothing is slow any more.
 
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Old Apr 27, 2016 | 03:31 PM
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This slow fill problem is a common one and not restricted to Jaguars. It can be instantly solved by simply pulling the filler nozzle out a bit so that air to the filler tube is not restricted. In other words, inserting the nozzle fully, up to its rubber shield, will very often result in the nozzle shutting off; pulling it out slightly will allow the flow of fuel to be restored.
 
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