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High RPM misfire

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Original source
3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHHigh RPM misfire

Leading reported evidence

Use alldatadiy

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.

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

or using AllDataDIY, but it's late and I'm feeling lazy..)

Original post Read captured discussion
High RPM misfire
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Leading evidence: 'Use alldatadiy' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use alldatadiy' (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 · 3 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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

Use alldatadiy

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

or using AllDataDIY, but it's late and I'm feeling lazy..)

Original post Read captured discussion
High RPM misfire
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.

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

  • Planet-9: 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: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 2Original post

If the cats are working correctly, the rear O2 sensors outputs are flat. If you see activity on them the cat isn't doing it's job. The fact you got both banks in the pending codes to me means I would record these, then reset them, and see if they come back. I assume the P3XXX codes are misfire codes? (We do have a table here somewhere to look it up.. or using AllDataDIY, but it's late and I'm feeling lazy..) You did new injectors and new plugs. Have you looked at the intake valves? With 110k miles on the engine, I would hazard a guess that the intake valves are badly coked up and restricting flow possibly at higher RPM since the engine needs more air for more revs. Meanwhile - welcome to Planet-9, the Friendly Porsche Forum! We often get new users - first post - when something breaks - who then hang around and become friends with members. To that end we have a forum for new members to introduce themselves and their cars. It can be found at: https://www.planet-9.com/forums/new_members/

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