I have a 911 996 c4s, when i try to refuel the pump nozzle keeps clicking asif the tank where full. Any ideas? Ive tried different pumps and pumps ive used before cheers. Thanks for all the info had a look behind filler cap and found the bleed vent valve tried testing it not sure how it works but theirs aplastic lug next to filler cap which opens this valve when you screw cap on which seems to sugest valve closes when refueling and also that its working also checked nrv valve and pipes from fuel tank all clear and seem to be fine didnt really hear a click when opening the flap in the fuel filler pipe (how loud would it be ) also checked fuse e6 all ok and no erro codes in car .this is a new problem only just started happening tried all ways with the petrol pump thanks for replys
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fuel filling problem
- Thread starter paul1
- Start date
Jonathon555
Suzuka
- Joined
- 4 May 2014
- Messages
- 1,081
paul1 said:
Sensitive pump, it happens on all my cars at one point.
If it is really bad and does it on a lot of pumps (like you seem to mention in your other thread) then it possibly could be the vent valve. Or a vent pipe blocked.
https://www.youtube.com/watch?v=8mg_hXSMj2U
https://www.youtube.com/watch?v=8mg_hXSMj2U
infrasilver
Moderator
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- 4 Oct 2010
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- 9,933
It could be the filler tube breather or closing cap at the bottom of the tube causing this issue. I had to change my filler tube for an earlier version to stop this issue I was plagued with, it could take me 15 minute to fill the tank sometimes, this was years ago now and the older filler tube with a breather pipe has been faultless since.
Hopefully it's just various fuel stations causing the cut off but if you want to cure it, a new tube will do the trick.
Hopefully it's just various fuel stations causing the cut off but if you want to cure it, a new tube will do the trick.
Zebravanman
New member
- Joined
- 14 Dec 2014
- Messages
- 10
I have exactly the same issue, I have just bought the car from a dealer and it's driving me mad.
I've tried everything in terms of nose rotation and it doesn't work for me. Sometimes it splashes back through the filler as well, I have also noticed that I can't get a full tank of fuel in, it always indicates about 5mm below full and then I will do 15 miles then it indicates 3/4 full so something is a miss for me.
I have also had the engine light on with codes such as
P0450,P0446 and one other (not at the same time), It is pointing that there may be a blockage from the EVAP system to the engine somewhere.
I have taken it to Coolit in Dorchester (Porsche Specialist) and they are further diagnosing the issue.
I looked at my fuel cap and saw the seal was all cracked (not that that would prevent me fuelling up) and I replaced it, interesting enough the engine light hasn't come back on yet.
I will let you know what the garage find, it's driving me mad as well. I also have a Cayenne without any of these issues I can refuel at full speed without any click off's.
Andy
I've tried everything in terms of nose rotation and it doesn't work for me. Sometimes it splashes back through the filler as well, I have also noticed that I can't get a full tank of fuel in, it always indicates about 5mm below full and then I will do 15 miles then it indicates 3/4 full so something is a miss for me.
I have also had the engine light on with codes such as
P0450,P0446 and one other (not at the same time), It is pointing that there may be a blockage from the EVAP system to the engine somewhere.
I have taken it to Coolit in Dorchester (Porsche Specialist) and they are further diagnosing the issue.
I looked at my fuel cap and saw the seal was all cracked (not that that would prevent me fuelling up) and I replaced it, interesting enough the engine light hasn't come back on yet.
I will let you know what the garage find, it's driving me mad as well. I also have a Cayenne without any of these issues I can refuel at full speed without any click off's.
Andy
infrasilver
Moderator
- Joined
- 4 Oct 2010
- Messages
- 9,933
The first thing to do is check fuse E6 (I think) this controls the EVAP, check for a click when you open the small flap at the top of the filler tube, if the fuse isn't blown listen for this sound of the valve working.
I went through all these processes including checking the carbon cannister and pushing a thin metal flexible shaft down the filler tube as there are also wires in the tank that can keep the lower flap open or dislodged. I didn't get a result whatever I did. The next step which I'd not read about anywhere online was to replace the filler tube like I mentioned above, I found my part number was a newer versions on my car (as it is a 3.6) than the used one I'd bought but I also knew there didn't seem to be a air return from the tank on mine, the one I bought had a tube running alongside the main filler tube to allow air to escape. Problem solved.
Another thing to check is the black (with pink) valve at the top of the filler tube I think this may be the problem if you don't hear the click mentioned.
My original tube (black end) has the thinner filler tube and no air return tube, the other one is a noticeably larger diameter.
Looking at the filler tube from the bottom showing the vent pipe along side.
I went through all these processes including checking the carbon cannister and pushing a thin metal flexible shaft down the filler tube as there are also wires in the tank that can keep the lower flap open or dislodged. I didn't get a result whatever I did. The next step which I'd not read about anywhere online was to replace the filler tube like I mentioned above, I found my part number was a newer versions on my car (as it is a 3.6) than the used one I'd bought but I also knew there didn't seem to be a air return from the tank on mine, the one I bought had a tube running alongside the main filler tube to allow air to escape. Problem solved.
Another thing to check is the black (with pink) valve at the top of the filler tube I think this may be the problem if you don't hear the click mentioned.
My original tube (black end) has the thinner filler tube and no air return tube, the other one is a noticeably larger diameter.
Looking at the filler tube from the bottom showing the vent pipe along side.
Fuel
There is a problem on the 911 guys re fuel filling, there's a fuse that can cause the problem and there's a switch that controls fuel going in & fumes coming out.
There's an electronic vent tube valve located just past the fuel door area. To access it you need to lift car and remove passenger front wheel/fender well shroud and you'll see it up attached to the aluminum tube. If that doesn't function, the tank cannot vent while filling. Takes awhile to fill it slowly, but can be filled, I think putting the fuel novel at nine o clock works best.so if you put fuel handle in normal where you click is at 6 o'clock rotate this left to the 9 o'clock position
However if I remember correctly, there is also a built in rollover valve in the filler neck down near where it attaches to the tank that can stick closed. If it does, the tank is almost impossible to fill by means of the filler neck and fuel spills out as fast as you can put it in. The switch is called a Reede switch which is controlled by fuse E6 so try this first, it's £310 fix at Porsche where they remove the top part of the filler neck remove the reed switch and replace it correctly
There is a problem on the 911 guys re fuel filling, there's a fuse that can cause the problem and there's a switch that controls fuel going in & fumes coming out.
There's an electronic vent tube valve located just past the fuel door area. To access it you need to lift car and remove passenger front wheel/fender well shroud and you'll see it up attached to the aluminum tube. If that doesn't function, the tank cannot vent while filling. Takes awhile to fill it slowly, but can be filled, I think putting the fuel novel at nine o clock works best.so if you put fuel handle in normal where you click is at 6 o'clock rotate this left to the 9 o'clock position
However if I remember correctly, there is also a built in rollover valve in the filler neck down near where it attaches to the tank that can stick closed. If it does, the tank is almost impossible to fill by means of the filler neck and fuel spills out as fast as you can put it in. The switch is called a Reede switch which is controlled by fuse E6 so try this first, it's £310 fix at Porsche where they remove the top part of the filler neck remove the reed switch and replace it correctly
JohnnyDangerous
Estoril
- Joined
- 12 Jun 2013
- Messages
- 3,620
If the EVAP system is faulty it should throw a fault code and illuminate the MIL light.
chriscoates81
Suzuka
- Joined
- 17 May 2013
- Messages
- 1,112
I find when filling mine, i get best results by letting the nozzle rest on the bottom lip of the tank ( i hope that makes sense). The only problem is i have to stoop slightly to fill up but it works well. I tend to only use one station as well as its on the way home from work.
infrasilver
Moderator
- Joined
- 4 Oct 2010
- Messages
- 9,933
I think there are differing degrees of fault, some you can fill by changing the direction of the nozzle or using a different fuel station but there are some instances where this will not resolve the issue and this then requires a more detailed investigation into the filler tube or some other issue in the system.
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