8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHDying above 5500 revs
Leading reported evidence
Install about 8k miles ago
Performed · outcome unconfirmed
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 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 · Original poster
I had a new air mass sensor fitted about 8K miles ago to clear a cough at about 4K revs, I'm wondering whether it's something sticking in the variocam (although it does sound okay to my untrained ear, and I remember a Porche technician saying that variocam problems are pretty obvious misfiring).
Leading evidence: 'Install about 8k miles ago' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'failed oil seperator' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Install about 8k miles ago' (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.
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 suspect 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.
Suspected cause · Original poster
As you will see from another thread soon afterwards I thought the engine had blown (clouds of oil smoke out the rear) but it turned out to be a failed oil seperator.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Replace 2
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 had to replace 2 on a 3.4 with 60k on the clock.
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
If you are ever in the Maidenhead area with some spare time I would be happy to do a run with my scan tool to see if it flags up faults.
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 · Original poster
Again I seem to remember someone saying that you need to do a "live" test with the engine running and wired up to the test equipment.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install about 8k miles ago
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 · Original poster
I had a new air mass sensor fitted about 8K miles ago to clear a cough at about 4K revs, I'm wondering whether it's something sticking in the variocam (although it does sound okay to my untrained ear, and I remember a Porche technician saying that variocam problems are pretty obvious misfiring).
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
failed oil seperator
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect 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.
Suspected cause · Original poster
As you will see from another thread soon afterwards I thought the engine had blown (clouds of oil smoke out the rear) but it turned out to be a failed oil seperator.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 1 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I am intrigued that a new MAF did not cure the problem, as I was contemplating giving it a try.
My 3.4 has a problem that's developing from intermittent to permanent in that it's losing virtually all acceleration above 6K revs and sometimes from as little as 5K. It seems worse under load (i.e. in 3rd rather than 2nd, or uphill). It was doing it intermittently, or it felt that given a few full bore sprints it would clear its' throat and sort itself out, and sometimes it will unclog itself somewhere between 6 and 7, or by backing off slightly and having another go, but to be honest I don't fancy keeping it in that area when there's clearly a problem, it sounds okay, but I don't know what damage I might be doing if e.g. it's starved of petrol.
I had a new air mass sensor fitted about 8K miles ago to clear a cough at about 4K revs, I'm wondering whether it's something sticking in the variocam (although it does sound okay to my untrained ear, and I remember a Porche technician saying that variocam problems are pretty obvious misfiring).
Any thoughts?
You really need to get it plugged into a PST2 or other scanner which will access the fault memory. Once you have a fault code it will make the diagnosis much easier.
Yeah, except it had a service only about 3 weeks ago, and the diagnostic log didn't show any problems. Again I seem to remember someone saying that you need to do a "live" test with the engine running and wired up to the test equipment. I'm going to get it booked in the garage for next week
Mike,
If you are ever in the Maidenhead area with some spare time I would be happy to do a run with my scan tool to see if it flags up faults. email me via my Profile page if I can help.
I have exactly the same problem, and wrote about it on this forum some time ago. No faults show up on diagnostics, when tested. I am intrigued that a new MAF did not cure the problem, as I was contemplating giving it a try. If you do find out what is causing this problem, please let me know!
If you are also getting an intermittent misfire it might be the coils , think there's one per cylinder. I had to replace 2 on a 3.4 with 60k on the clock.
Thanks for these thoughts guys. I'd forgotten I'd started this thread, as events moved on. As you will see from another thread soon afterwards I thought the engine had blown (clouds of oil smoke out the rear) but it turned out to be a failed oil seperator. Sorting that out also seems to have solved the power loss, so presumably there had been tiny amounts of oil getting in the engine for a while, scary thought, but seem to have got away without too much damage to the wallet (fingers crossed)
This is a source reference. Confirm exact model applicability in the original material.
