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1999 996 C4 whine from front RHS wheel arch

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH1999 996 C4 whine from front RHS wheel arch

Leading reported evidence

Check over and one of the front

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
The AC system was checked over and one of the front to back AC pipework components (or refrigerant line) was replaced as it was leaking.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Read full discussion summary

Leading evidence: 'Check over and one of the front' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'fuel pump making the noise' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check over and one of the front' (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.

Read captured replies

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

Compare 3 other evidence results

Replace fuel pump failed back in july 2017

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
The fuel pump failed back in July 2017 and was replaced.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

fuel pump making the noise

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause · Original poster
I woudl expect it to, if it was the new fuel pump making the noise.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Run on auto

Suggestion or failed attempt

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
The system was regassed and is now running on Auto.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Frequently discussed actions (3)

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

Check over and one of the front

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
The AC system was checked over and one of the front to back AC pipework components (or refrigerant line) was replaced as it was leaking.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Replace fuel pump failed back in july 2017

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
The fuel pump failed back in July 2017 and was replaced.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Run on auto

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
The system was regassed and is now running on Auto.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

Reported and suspected causes (1)

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

fuel pump making the noise

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause · Original poster
I woudl expect it to, if it was the new fuel pump making the noise.
Original post Read captured discussion
1999 996 C4 whine from front RHS wheel arch

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.

1 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 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: 20261026T065735Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello, I have an intermittent whine noise from the front RHS wheel arch of my 1999 996 C4. A zipped M4A sound file is attached. This was taken o a smartphone held nead the RHS wheel arch. I have taken it to my local Porsche specialist (ie non dealer) here in the UK, but we have not been able to isolate the issue. Having browsed the Porsche forums, two potential sources found at the fron of a 996 are highlighted. (1) The Porsche OEM replacement fuel pump, located in the saddle tank in the fromt or the 996. The fuel pump failed back in July 2017 and was replaced. The intermittent whine noise can be preceded by a "chirrup" when starting the car. The intermittent whine noise is heard around the front of the car, especially from front RHS wheel arch area. We opend the fuel filler cap and listened into the C4 saddle tanks, but the whine did not appear to get louder. I woudl expect it to, if it was the new fuel pump making the noise. (2) The AC system. The AC system was checked over and one of the front to back AC pipework components (or refrigerant line) was replaced as it was leaking. The system was regassed and is now running on Auto. The AC had not run from some years, as I used to live in a colder area of the UK. Do the Rennlist community have any suggestions on how to troubleshoot or resolve the issue? Are there any forum treads that will help me here? Does the sound file help any? Thanks, Nick

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