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Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHLoud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace power steering pump

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
I recently changed my power steering pump, with required removal of a lot of things in the engine bay.
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed work

Clean with some brake cleaner seemed

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
A thorough cleaning with some brake cleaner seemed to work fine.
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

Leading evidence: 'Replace power steering pump' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean with some brake cleaner seemed' (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 · 6 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Clean with some brake cleaner seemed

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
A thorough cleaning with some brake cleaner seemed to work fine.
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect dme

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
And it just stops because you disconnect the DME?
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

Clean with some brake cleaner seemed

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
A thorough cleaning with some brake cleaner seemed to work fine.
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Disconnect dme

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
And it just stops because you disconnect the DME?
Original post Read captured discussion
Loud hum from engine bay - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace power steering pump

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
I recently changed my power steering pump, with required removal of a lot of things in the engine bay.
Original post Read captured discussion
Loud hum from engine bay - 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.

6 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

Hi, I'm hoping someone can help me figure out what's wrong with my car. I recently changed my power steering pump, with required removal of a lot of things in the engine bay. After I installed everything, I'm now getting a loud hum, really more like a constant tone from the engine bay. Is hard to pin point the exact location (I need to find a hose somewhere). The sound appears when accessory power is applied, and removing fuse B8 (think that's right) stops the sound. It's a tone with a frequency of 1800 Hz with a strong second harmonic at 3600 Hz. The fuse description says it's the alarm, but I though that was under the hood. Attached is the spectrogram (I couldn't upload a video), and a picture of the fuse that stops the sound when removed. Thanks in advance! Bryan

POST 2Original post

It seems fuse B8 is for the alarm, ECU and Tiptronic control. Can the humming be coming from the idle control valve oscillating between two positions? And it just stops because you disconnect the DME?

POST 3 / ORIGINAL POSTEROriginal post

Yes, so it's definitely something in the throttle. I took the throttle off and the buzzing is coming from the butterfly. If I press on the butterfly with my fingers, it goes away. Does this mean I need a new throttle body? Has anyone seen this before, and is there a common fix, like taking apart the throttle and cleaning something? I have a 2002 so apparently it doesn't have an idle control valve.

POST 4 / ORIGINAL POSTEROriginal post

I guess this is a sign that I should upgrade to the bigger throttle 😆!

POST 5Original post

Oh, it's the throttle body's actuator then. Probably you messed with its cable while working around the pump, shorted somehow or similar. Inspect the wiring harness and all cables in the surroundings of the area you have worked at.

POST 6 / ORIGINAL POSTEROriginal post

A thorough cleaning with some brake cleaner seemed to work fine. Thanks for the help!

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