Planet-9

sudden power loss under heavy load

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Original source

6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHsudden power loss under heavy load

Reported or suspected cause

now

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

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 report identifying 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.

Reported cause
Problem is now resolved though.
Original post Read captured discussion
sudden power loss under heavy load

Frequently discussed work

Run into the same mysterious p1508 code

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
10 years later I ran into the same mysterious P1508 code.
Original post Read captured discussion
sudden power loss under heavy load

Read full discussion summary

Leading evidence: 'now' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'now' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Run into the same mysterious p1508 code' (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 · 1 partial discussions

Compare 2 other evidence results

self-inflicted playing

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying 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.

Reported cause
The cause is self-inflicted playing with the EMC (
Original post Read captured discussion
sudden power loss under heavy load

Run into the same mysterious p1508 code

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
10 years later I ran into the same mysterious P1508 code.
Original post Read captured discussion
sudden power loss under heavy load

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.

Run into the same mysterious p1508 code

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
10 years later I ran into the same mysterious P1508 code.
Original post Read captured discussion
sudden power loss under heavy load

Reported and suspected causes (2)

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

now

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying 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.

Reported cause
Problem is now resolved though.
Original post Read captured discussion
sudden power loss under heavy load

self-inflicted playing

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying 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.

Reported cause
The cause is self-inflicted playing with the EMC (
Original post Read captured discussion
sudden power loss under heavy load

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.

Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

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

Outcome without a verified action link
Actually, I ended up dialing back the throttle response and this also cured the problem.
Original post Read captured discussion
No unique explicit quoted action; no causal link assigned

Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hi - hoping to get some help. My 986 has been experiencing power loss under high load around 5000-6000 RPM intermittently. Difficult to reproduce though when it happens, the engine does not die - loses pwer and throttle response. Killing and restarting the ignition seems to reset it. It does produce a p1508 error and all points to the MAF though after replacing it, the issue still happens occasionally. Any thoughts? suggestions? Thanks in advance Paul

POST 2Original post

Upon what basis do you believe P1508 points to the MAF? If I'm not mistaken it points to the e-Gas system to a difference in commanded an actual throttle opening, something like that. (I can't put my hands on the e-Gas document I have.)

POST 3Original post

A number of forums pointed to MAF as being an issue for similar symptoms. Problem is now resolved though. It was related to an ECU update. Issues with the flash update though initially the provider (not to be named) insisted it was not due to them. Flashed back to stock and it was fine. thanks all

POST 4Original post

Glad you got it sorted out.

POST 5Original post

10 years later I ran into the same mysterious P1508 code. Another indication is the Durametric freeze frame scan give an "Implausible" as the Fault Symptom This is the only Form post on this code so I thought I would add my experience too. The cause is self-inflicted playing with the EMC ( E lectronic M otor C ontroller but in German) mapping. In my case I was pushing the Throttle response to improve track performance. Somewhere in the EMC Porsche has error checking or limits. When things go outside those boundaries the P1508 code comes up and the engine goes into limp mode. In my case turning the car off and back on did not clear the limp mode. I needed to clear the code with an OBD reader. Solution was to flash back the previous EMC map. Actually, I ended up dialing back the throttle response and this also cured the problem. My car is a 2007 987.1 Cayman base. Lots of upgrades to suspension and engine.

POST 6Original post

Glad to hear.

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