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Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Clean no

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
MAF cleaned, throttle body cleaned - no change.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Clean no' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean no' (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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Clean throttle body

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
MAF cleaned, throttle body cleaned - no change.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace fuel pumps

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I've replaced fuel pumps on some of my other vehicles that acted strangly, but do not have experience with the 986 series.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use winter

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
UK summer approaching and the boxster’s getting its startup maintenance planned – not been used all winter.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill with gas / petrol / fuel

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
also, no problem filling with gas / petrol / fuel....
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean no

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
MAF cleaned, throttle body cleaned - no change.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Clean throttle body

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
MAF cleaned, throttle body cleaned - no change.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Combined work: Clean no + Clean throttle body

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Unsuccessful attempt · Original poster
Unknown history other than me for the last year or so. MAF cleaned, throttle body cleaned - no change.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Fill with gas / petrol / fuel

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
also, no problem filling with gas / petrol / fuel....
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace fuel pumps

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
I've replaced fuel pumps on some of my other vehicles that acted strangly, but do not have experience with the 986 series.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use winter

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
UK summer approaching and the boxster’s getting its startup maintenance planned – not been used all winter.
Original post Read captured discussion
Cutting out / idle dropping / fuel tank noise after long drive - 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.

4 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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello again. 2000 Boxster S approx 70k miles. No fault codes stored. Unknown history other than me for the last year or so. MAF cleaned, throttle body cleaned - no change. UK summer approaching and the boxster’s getting its startup maintenance planned – not been used all winter. One problem I had all of last year was that, after maybe a 20 mile drive @ 70mph (motorway / freeway), than enter a city and drive in stop start traffic for another 2 miles or so, the engine revs get very uneven and drop to a point where it almost stalls. Usually it picks up, but if it doesn’t, it stalls and is difficult to start. All of this is usually accompanied by a fairly loud groan from the fuel tank area. Sometimes, removing the fuel cap, pressing the flap and letting a bunch of air in (or out?) helps the starting if it stalled or smooths out the dropping idle speed. I have a new fuel filter that I didn’t fit last year, so I will do that shortly, but I was looking for some advice as to what other areas to tackle. I appreciated you taking the time to look. Many thanks Paul

POST 2Original post

If I'm not mistaken, the fuel pump resides within the fuel tank itself. This may be a sign of a pump which is starting to fail. Unfortunently, they don't seem to just stop, but act strange intermittently until they die. I've replaced fuel pumps on some of my other vehicles that acted strangly, but do not have experience with the 986 series.

POST 3Original post

It's a collapsed hose in the fuel tank stem. Fairly common issue which has had a TSB issued by Porsche, been well discussed here. Do a search and you find lots of reading.

POST 4 / ORIGINAL POSTEROriginal post

many thanks for the rpely. i've spent hours searching - can i just check - was that a typo "stem" - did you mean "system"? also, no problem filling with gas / petrol / fuel.... and new air filter cheers paul

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