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PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHPORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK

Leading reported evidence

Replace design of the earth strap in 07/08

Performed · outcome unconfirmed

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 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

I believe Porsche changed the design of the earth strap in 07/08 to a much more robust cable...that said after all that was checked with a voltmeter etc and things tried the only time the car was proper sorted was when the starter motor was replaced as someone above pointed out they and the alternators dont go on forever.My indy got a re-conditioned Bosch one at a third of the cost my OPC wanted for a new one just in case yours turns out to be the same thing.

Original post Read captured discussion
PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK
Frequently discussed work

Check charging voltage

No successful repair reported for this finding.

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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

I'd suggest a volt meter across the battery to check charging voltage.

Original post Read captured discussion
PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK
Read full discussion summary

Leading evidence: 'Replace design of the earth strap in 07/08' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check charging voltage' (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 1 other evidence results

Check charging voltage

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

I'd suggest a volt meter across the battery to check charging voltage.

Original post Read captured discussion
PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK
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.

Check charging voltage

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

I'd suggest a volt meter across the battery to check charging voltage.

Original post Read captured discussion
PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK

Replace design of the earth strap in 07/08

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

I believe Porsche changed the design of the earth strap in 07/08 to a much more robust cable...that said after all that was checked with a voltmeter etc and things tried the only time the car was proper sorted was when the starter motor was replaced as someone above pointed out they and the alternators dont go on forever.My indy got a re-conditioned Bosch one at a third of the cost my OPC wanted for a new one just in case yours turns out to be the same thing.

Original post Read captured discussion
PORSCHE 911 PROBLEM, PLEASE HELP ME - Page 1 - 911/Carrera GT - PistonHeads UK
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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.

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

  • PistonHeads: 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

It could be the weak starter motor/alternator loom on early 997's, i had this and when my c2s was warm it struggled to start up, when cold it was fine. About £400 to have the cable replaced at an OPC. Far less elsewhere.. The cable Itself is about £65

POST 2Original post

When charging your alternator should be giving an output of 14.7 volts . This can easily be measured with a clip on ammeter on battery lead. If not charging at this rate the cable "slakster " describes can be at fault or the alternator/battery its self is faulty. You need readings taken on battery status/ condition and alternator output to get an accurate diagnosis on your fault (s).

POST 3Original post

I'd suggest a volt meter across the battery to check charging voltage. As above, there is a cable that is known to fail on some early 997's. The alternators don't last forever either. Get the car to a good Porsche specialist and get it checked out. Good luck!

POST 4Original post

Echo all comments here my 997 Turbo did the same for ages was a lot worse when the engine was warm and it sounded like the text book alternator cable or earth strap problem. I believe Porsche changed the design of the earth strap in 07/08 to a much more robust cable...that said after all that was checked with a voltmeter etc and things tried the only time the car was proper sorted was when the starter motor was replaced as someone above pointed out they and the alternators dont go on forever.My indy got a re-conditioned Bosch one at a third of the cost my OPC wanted for a new one just in case yours turns out to be the same thing.

POST 5Original post

Slackster said: It could be the weak starter motor/alternator loom on early 997's, i had this and when my c2s was warm it struggled to start up, when cold it was fine. About £400 to have the cable replaced at an OPC. Far less elsewhere.. The cable Itself is about £65 Seconded. The 997S.1 I owned developed this problem too. It's caused by the cable that runs from the back of the alternator to the battery developing a higher than normal resistance (due to corrosion in-between the cable and the terminals on the ends, I believe). From memory, there's also a junction box on (or near - can't remember now)) the gearbox that has to be replaced as well as the cables. To the OP - Parts cost is low and any good independent will do the job at a reasonable price for you as it's a well-known issue. So not a serious problem and it will disappear completely once the bits are replaced. Don't let it spoil your enjoyment of the car.

POST 6 / ORIGINAL POSTEROriginal post

The initial message was deleted from this topic on 03 April 2018 at 15:04

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