Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 08-07-2013, 05:52 AM   #1
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
excessive pressure in the gas tank?

Headed over to a friends house to try to figure out why he can"t get gas to go into his 04 Boxster S. He is almost empty and tried to gas up at 2 locations that he regularly uses, but it kicks it back out as if there were a lot of pressure in the tank keeping it from going in. Anyone had this problem or have a clue as to what to check out.

mountainman is offline   Reply With Quote
Old 08-07-2013, 06:04 AM   #2
Registered User
 
thom4782's Avatar
 
Join Date: Sep 2010
Location: Foster City CA
Posts: 1,099
Porsche issued a technical bulletin in this issue. Apparently, there are a couple of hoses in the fuel tank that get in the way and restrict the fuel flap from opening completely. The fix is to use zip ties to move the hoses out of the way. IIRC the procedure involves removing the fuel sending unit.
thom4782 is offline   Reply With Quote
Old 08-07-2013, 06:47 AM   #3
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
Quote:
Originally Posted by thom4782 View Post
Porsche issued a technical bulletin in this issue. Apparently, there are a couple of hoses in the fuel tank that get in the way and restrict the fuel flap from opening completely. The fix is to use zip ties to move the hoses out of the way. IIRC the procedure involves removing the fuel sending unit.
Thanks Thom, Going to meet him later today at the gas station and see if I can get more insight into how it is acting. He is a great guy and good neighbor, but is a retired pediatrician and it seems that babies and Porsches are not enough alike to help him figure out some of these problems so I help out when I can.
Any idea how I could access the tech bulletin for more info?
mountainman is offline   Reply With Quote
Old 08-07-2013, 07:27 AM   #4
Registered User
 
thom4782's Avatar
 
Join Date: Sep 2010
Location: Foster City CA
Posts: 1,099
The TSB title is Fuel Tank Hose Modification. If you're a Contributing Member in the Renntech forum, you can download it from the DIY section. Not sure if I can download the and share because of copyright limitations.

PS: Picture of hoses zip tied in place
Attached Images
 

Last edited by thom4782; 08-07-2013 at 09:43 AM. Reason: Added picture
thom4782 is offline   Reply With Quote
Old 08-07-2013, 07:32 AM   #5
Registered User
 
Join Date: Jun 2013
Location: Mexico
Posts: 48
Sometimes is the venting valve of the gas tank, depending on the year check the fusible in my case 2002 is E6.
Laredo is offline   Reply With Quote
Old 08-07-2013, 07:56 AM   #6
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
Quote:
Originally Posted by Laredo View Post
Sometimes is the venting valve of the gas tank, depending on the year check the fusible in my case 2002 is E6.
Thanks I'll check that.
mountainman is offline   Reply With Quote
Old 08-07-2013, 09:01 AM   #7
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
Garage
Turning the hose nozzle 180degrees upside down usually helps
BYprodriver is offline   Reply With Quote
Old 08-07-2013, 09:50 AM   #8
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
Quote:
Originally Posted by BYprodriver View Post
Turning the hose nozzle 180degrees upside down usually helps
Tried that and by going very slowly was able to get in about half a tank. Also checked the E6 fuse ( on the 04 diagram I could not find any listing for a fuse dealing with the fuel tank vent. Looks like it may be time to go into the tank. I am not sure if friendship extends that far.
mountainman is offline   Reply With Quote
Old 08-07-2013, 09:53 AM   #9
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
Quote:
Originally Posted by thom4782 View Post
The TSB title is Fuel Tank Hose Modification. If you're a Contributing Member in the Renntech forum, you can download it from the DIY section. Not sure if I can download the and share because of copyright limitations.

PS: Picture of hoses zip tied in place
Thanks Thom, I will have to join renntech and check it out. Who knows, mine may do it someday. Still not clear on what is actually happening to cause the problem, but maybe the TSB will explain in detail how it is malfuncting. Thanks again

Last edited by mountainman; 08-07-2013 at 10:00 AM.
mountainman is offline   Reply With Quote
Old 08-07-2013, 10:46 AM   #10
Registered User
 
Join Date: Jun 2013
Location: Mexico
Posts: 48
Quote:
Originally Posted by mountainman View Post
Tried that and by going very slowly was able to get in about half a tank. Also checked the E6 fuse ( on the 04 diagram I could not find any listing for a fuse dealing with the fuel tank vent. Looks like it may be time to go into the tank. I am not sure if friendship extends that far.
The technical name is onboard refueling vapor recovery (ORVR) valve. On all 2000 and newer Porsche cars. An electronic onboard refueling vapor recovery (ORVR) system including an electrically operated ORVR valve that selectively opens and closes a fuel vapor path between the fuel tank and a collection canister.

Last edited by Laredo; 08-07-2013 at 10:53 AM.
Laredo is offline   Reply With Quote
Old 08-07-2013, 11:00 AM   #11
Registered User
 
mountainman's Avatar
 
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
Garage
Quote:
Originally Posted by Laredo View Post
The technical name is onboard refueling vapor recovery (ORVR) valve. On all 2000 and newer Porsche cars. An electronic onboard refueling vapor recovery (ORVR) system including an electrically operated ORVR valve that selectively opens and closes a fuel vapor path between the fuel tank and a collection canister.
Thanks, OR/VR is one of the things listed in E6 on the fuse diagram which calls for a 7.5 amp fuse. It actually had a 5 amp fuse in it that was not blown and I replaced it with the correct 7.5 and it made no difference. It could be the valve itself. I'll do some more research. Every small piece of info helps to understand what is happening.

mountainman is offline   Reply With Quote
Post Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:57 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page