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Newbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...

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YOUR RESEARCHNewbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...

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Replace randomly

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Suggestion · Original poster

(5th at roughly 45 MPH) Additionally the RPM's "flutter" with about a 70-100RPM change randomly.

Newbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...
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Leading evidence: 'Replace randomly' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace randomly' (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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Run diagnostics and mentioned

Suggestion or failed attempt

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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.

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Suggestion · Original poster

They ran diagnostics and mentioned that (Please dont quote me on this) that cylinders 2/4/6 might be missing due to the AMS or possibly an O2 Sensor?

Newbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...
Frequently discussed actions (2)

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

Replace randomly

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

(5th at roughly 45 MPH) Additionally the RPM's "flutter" with about a 70-100RPM change randomly.

Newbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...

Run diagnostics and mentioned

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

They ran diagnostics and mentioned that (Please dont quote me on this) that cylinders 2/4/6 might be missing due to the AMS or possibly an O2 Sensor?

Newbie here with a troubling question re: Engine RPM 'Flutter' and Shifting issues...
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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.

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

  • Rennlist: 1 discussions

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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi Everyone, Im new to the site and express appreciation in advance for any help I can get. Im in Australia at the moment and recently purchased a 1998 996 3.4l. 160,000 kms, or 100,000 miles and in impressive condition........ except for this one small problem.... The car likes to shift rather quickly and I find myself in 5th gear doing 1400-1700 RPM at only 70-75kms/hr... (5th at roughly 45 MPH) Additionally the RPM's "flutter" with about a 70-100RPM change randomly. I know its small, but I believe the car may recognize a fault with Fuel/Air, or Speed Sensor? I was advised by the dealer to replace the Air Mass Sensor, (They charge $1300) I bought one new for $420 and this is not the problem.... They ran diagnostics and mentioned that (Please dont quote me on this) that cylinders 2/4/6 might be missing due to the AMS or possibly an O2 Sensor? It wasnt the Air Mass, and I dont see how an O2 Sensor would cause this problem..... Unfortunately Porsche is ridiculously expensive here in Australia and not too many mechanics work on them... Any advice is greatly appreciated. -TK

POST 2Original post

Hi Tk1227, I'm from Aus to, where abouts do you live, I'm in Melbourne there are some quality non-factory porsche mechanics shops here, and i know of some in QLD. Personally i cant help with your problem. And yes porsches are expensive here, just bought a 2007 Cayman S.

POST 3 / ORIGINAL POSTEROriginal post

Hi Steve, Any advice you can give me regarding a QLD mechanic would be great. I am on the Gold Coast if you know of anyone, that would truly be great. My mobile is 0447 466 177 Congrats on the Cayman S!

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