10-02-2015, 10:28 AM
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#1
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,653
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On the early cars, there were two gas filling problem areas: Flexible lines in the tank it self that can move and block a one way surge flap in the filler neck, the second was the actuator that opens the same surge flap which could fail or blow out a fuse (E6), disabling the flap. There is a TSB for a Fuel Tank Hose Modification (dated 8-12-99) where: 1. Difficulty filling the fuel tank can occur if the flexible fuel hoses in the fuel tank obstruct the inner flap of the fuel filler neck. 2. Incorrect fuel gauge readings can also be caused by the flexible fuel hoses in the fuel tank, should they interfere with the travel of the fuel sending unit arm and/or float.
Couple of interesting reads:
http://www.renntech.org/forums/topic/2317-fuel-filling-problems-went-away/
http://www.renntech.org/forums/topic/5265-gas-wont-go-in-correctly/
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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10-02-2015, 02:24 PM
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#2
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The Gimp
Join Date: Mar 2013
Location: Bremerton, Wa
Posts: 27
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Quote:
Originally Posted by JFP in PA
On the early cars, there were two gas filling problem areas: Flexible lines in the tank it self that can move and block a one way surge flap in the filler neck, the second was the actuator that opens the same surge flap which could fail or blow out a fuse (E6), disabling the flap. There is a TSB for a Fuel Tank Hose Modification (dated 8-12-99) where: 1. Difficulty filling the fuel tank can occur if the flexible fuel hoses in the fuel tank obstruct the inner flap of the fuel filler neck. 2. Incorrect fuel gauge readings can also be caused by the flexible fuel hoses in the fuel tank, should they interfere with the travel of the fuel sending unit arm and/or float.
Couple of interesting reads:
http://www.renntech.org/forums/topic/2317-fuel-filling-problems-went-away/
http://www.renntech.org/forums/topic/5265-gas-wont-go-in-correctly/ |
Is there a way to just get rid of the flap? It sounds like an engineering mishap.
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10-02-2015, 02:32 PM
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#3
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The Gimp
Join Date: Mar 2013
Location: Bremerton, Wa
Posts: 27
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Never mind... I read the articles and I think I understand it. It's sort of like a check valve? Sounds like a ****************ty design though. I'll see what I can figure out. I really appreciate the help!
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10-02-2015, 03:10 PM
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#4
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Registered User
Join Date: Sep 2014
Location: santa barbara, CA & Devon, UK
Posts: 316
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I found this little 'thingy' hanging out in my gas filler cap access.
Any one have any ideas what it is? - maybe it has something to do with that hole below the filler tube? (although I think that's the drain hole)
 
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10-02-2015, 03:30 PM
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#5
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,653
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Quote:
Originally Posted by Habby73
Never mind... I read the articles and I think I understand it. It's sort of like a check valve? Sounds like a ****************ty design though. I'll see what I can figure out. I really appreciate the help!
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It is actually a very well thought out design, if that flap was not there, under hard cornering loads, liquid fuel would literally come up the filler tube and create other issues.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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10-02-2015, 04:25 PM
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#6
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The Gimp
Join Date: Mar 2013
Location: Bremerton, Wa
Posts: 27
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Quote:
Originally Posted by JFP in PA
It is actually a very well thought out design, if that flap was not there, under hard cornering loads, liquid fuel would literally come up the filler tube and create other issues.
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No, I get the purpose! Great purpose! Poor design having it controlled by a solenoid. It seems there could be a more efficient way, though I'm not a Porsche engineer.
Super thanks to you, though! I found fuse E6 was blown. Over two years trying to figure it out and I never though to check a fuse for the gas filler neck... Man... I feel defeated.
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10-02-2015, 06:02 PM
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#7
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,653
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Quote:
Originally Posted by Habby73
No, I get the purpose! Great purpose! Poor design having it controlled by a solenoid. It seems there could be a more efficient way, though I'm not a Porsche engineer.
Super thanks to you, though! I found fuse E6 was blown. Over two years trying to figure it out and I never though to check a fuse for the gas filler neck... Man... I feel defeated.
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Now put the EVAP system, which never did anything wrong, back where it belongs.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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10-03-2015, 10:07 AM
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#8
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The Gimp
Join Date: Mar 2013
Location: Bremerton, Wa
Posts: 27
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Quote:
Originally Posted by JFP in PA
Now put the EVAP system, which never did anything wrong, back where it belongs.
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No can-do. I cut a couple hoses. It's not gonna happen.
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