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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHStill can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
valve
Reported cause
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Reported cause
….it was the valve on top of the tank, underneath the battery.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'valve' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'valve' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check e36 fuse' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
The one it replaced seemed to work exactly the same when I blew through it and manipulated the lever that’s pressed by the fuel cap.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace tank bleeder valve
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Performed · outcome unconfirmed · Original poster
I then threw parts at it and replaced the tank bleeder valve which did no good.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check e36 fuse
Suggestion or failed attempt
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0
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1
Discussions
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Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check hose
Suggestion or failed attempt
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Suggestion
I would also check the hose that connects to the housing that the fresh air valve (11) is in.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace evap purge valve
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Suggestion · Original poster
Oh, I used to also have difficulty starting after adding fuel but that was also resolved by replacing the evap purge valve under the left side of the intake manifold.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace purge valve (tank venting valve in
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Suggestion · Original poster
I had the coke bottle sound but replacing the purge valve (tank venting valve in that diagram?) and the tank bleeder valve (Operative venting valve in that diagram?) seems to have resolved that.
Still can’t add fuel - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Turning the fuel nozzle upside down while pumping fixed the problem.
I’ve had my ‘00 Boxster S since October and have never been able to add fuel without it overflowing and shutting off the pump. I replaced the purge valve (under the intake manifold) first as I had a CEL for that. It cleared the CEL but had no effect on the fueling difficulties. I then threw parts at it and replaced the tank bleeder valve which did no good. The one it replaced seemed to work exactly the same when I blew through it and manipulated the lever that’s pressed by the fuel cap.
Anyway, I can fill it to 3/4 tank fine if I disconnect the fitting that connects to the orange side of the fuel fill valve. Once it gets to 3/4 with that hose disconnected it shuts the pump off but that’s how I’ve been operating. I just leave the fender liner off and I disconnect that hose to fill to 3/4. Apparently there’s another vent valve at the top of the tank and I assume that’s the only remaining suspect. Does anyone know how to properly test that prior to throwing more expensive parts at this problem?
Oh, I used to also have difficulty starting after adding fuel but that was also resolved by replacing the evap purge valve under the left side of the intake manifold.
Sounds like something in the Onboard Refueling Vapor Recovery (ORVR) system isn't working properly. You can verify your car has ORVR by looking for option code M664 on the sticker under the frunk lid.
I worked with the system a bit solving my coke bottle noise problem and the occasional hard to fuel problem. There are a lot of threads out there about it. Read this system description and the following thread.
http://986forum.com/forums/boxster-general-discussions/30050-orvr-valve-location-2000-boxster.html
Checking the fresh air valve (11) in the wheel well can be done by listening for the valve solenoid to click it open. Remove the gas gap, stick you finger in the filler neck and push the flappy thing all the way up. This will trigger the magnetic reed switch (9) and actuate the valve. You should be able to hear it.
You can do the same thing for the ORVR valve (6) on top of the tank, but I had to disconnect the fresh air valve (11) in order to hear it click.
I would also check the hose that connects to the housing that the fresh air valve (11) is in. If this is plugged you won't get the air flow you need.
Of course check your E36 fuse.
Thanks, I hadn't seen that particular diagram in my searching. It doesn't help that the names of the parts isn't consistent across all of the sources I've seen. I had the coke bottle sound but replacing the purge valve (tank venting valve in that diagram?) and the tank bleeder valve (Operative venting valve in that diagram?) seems to have resolved that. The purge valve was definitely bad, not sure if the tank bleeder valve was a waste of money and effort or not. The reed switch works and clicks valve 11 and/or 12 in that diagram. I'll have to locate the ORVR valve and see if that's opening with the reed switch or not.
Hi Jeff,
Wondering if you were able to locate/test/replace ORVR valve. I have 2003-S with fuel refill problem. No issue starting and no coke bottle noise. I think it’s ORVar valve but can’t seems to find it on sending unit. I do have option code M664 (which means I have ORVR system and this bugger is hiding somewhere.)
My '01 S had a problem in 2011 where the fuel dispenser would constantly shut off while pumping gas and would never get full. Turning the fuel nozzle upside down while pumping fixed the problem.
If you haven’t looked at the carbon canister, pull it out and see if it feels heavy. That’s an indication that the carbon is compromised and potentially blocking the vent flow. I also tried leaving the canister out and fueling up; that confirmed that the canister was the problem. Just be careful as not all fuel vapors are being contained.
This is a source reference. Confirm exact model applicability in the original material.
