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1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCH1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks

Reported or suspected cause

crank position sensor, as

Reported cause

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
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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 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

I had a very similar failure on my 1999, turned out to be the crank position sensor, as

Original post Read captured discussion
1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks
Frequently discussed work

Disconnect afm see if

No successful repair reported for this finding.

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Unsuccessful attempts
1
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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

Disconnect the afm see if that works it happened to me recently

Original post Read captured discussion
1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks
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Leading evidence: 'crank position sensor, as' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'crank position sensor, as' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Disconnect afm see if' (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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1 matching discussions · 6 captured posts examined · 0 partial discussions

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Disconnect afm see if

Suggestion or failed attempt

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 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

Disconnect the afm see if that works it happened to me recently

Original post Read captured discussion
1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks
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.

Disconnect afm see if

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

Disconnect the afm see if that works it happened to me recently

Original post Read captured discussion
1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks
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.

crank position sensor, as

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

I had a very similar failure on my 1999, turned out to be the crank position sensor, as

Original post Read captured discussion
1999 Carrera starts idles till warm, shuts off/ won't restart/ cranks
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.

  • 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: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi looking for some input I don't have any diagnostic software for a Porsche at the moment. The car starts up normal, idles normal for 10-15 minutes than it shuts off/ stalls out, and will only turn over will not restart. Wait for few hours or come back next day, starts right up does the same thing. This has been a daily thing as I move it around to work on other vehicles.

POST 2Original post

Disconnect the afm see if that works it happened to me recently

POST 4Original post

Sounds like a failing fuel pump. Take a pressure reading at the port on the fuel rail, I vaguely recall it should be around 50-55 bs pressure right after you turn the key but before the engine starts. Monitor your reading after startup until it stalls, should still hold pressure even after stalling cause the fuel pump should still be running. This test will either confirm the fuel pump is faulty or eliminate it as a cause of your stalling issue. Best of luck.

POST 5Original post

Crank position sensor. Does the tach jump when trying to restart it? If not, it's the crank position sensor.

POST 6Original post

I had a very similar failure on my 1999, turned out to be the crank position sensor, as theprf said. Car would start fine from cold, and would drive fine, but would die when idling warm, and then not restart. Pretty easy job, thankfully.

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