8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFLAT SPOT on my 996
Reported or suspected cause
sensor
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.
Leading evidence: 'sensor' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'sensor' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check over next week ££££££££££££££[' (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 performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
So I'm having my Mass sensor and the rest of the car checked over next week ££££££££££££££[
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
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Suggestion
My car is still running like a dog, I replaced the coils(£181) and it's made no difference [
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
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Suggestion · Original poster
Technician did not pick up any fault on the test drive but the laptop provided the diagnosis.
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
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Suggestion · Original poster
Surely, the test drive should be deployed if nothing appears on the computer.
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 · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T022239Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I seem to be getting this "flat spot" btw 5200 and 5800rpm. Everything is find below and above this range. I bought the car 7 months ago and put it through its 48k service in June. I am not sure if the flat spot has been there since purchase as I hardly ever get to that kind of rev. But since first discovering it, I seem to make a habit of finding it.
Does anyone else have any experience of flat spot on the 996 (1999 CAB)? Any suggested remedies before a trip to the OPC.......or is this normal
Can't say I have ever noticed a flat spot in the 996's rev range, only the usual "jerky" take up at light throttle opening.
Have you had an after market air box (or chip) put on it, as I have heard about certain models causing flat spots in the rev range.
If not, I think it's OPC here we come, best of luck.
I have a slight flat spot when pulling away in first. if you pull away gently it sometimes dies and stalls. Most embarassing...[
] Reasonable amount of revs and no problems.
Since I fitted an induction kit it has also got a little bit of a lag at about 3500-4000 rpm but as my right foot is usually clamped to the loud pedal it only lasts about a tenth of a nanosecond.
I've had a similar problem with my Boxster, which to has also done 48,000 miles. It sometimes feels like the rev limiter is kicking in early.
At the last service I was told a part of the HT leads was cracking (I think they called them spark packs, ie ignition coils). They cost about £28 a piece (with club discount) and there is one per cylinder. Anyway the problem is getting worse so I am ordering a set this week, I'll let you know if it cures the missfire.
Don't know if its relevant, but my previous car a 993 experienced a similar problem at around 50K miles. Turned out to be a sensor on the flywheel. It tells the ecu that the engine is running or something, and was turning off the fuel. Very disconcerting when overtaking on asingle carriageway in France!!
Thanks for all the suggestions. Took it to the OPC and it turned out to be the Hot air MAF sensor. Technician did not pick up any fault on the test drive but the laptop provided the diagnosis. Apparently, this tend to "go" after about 4 years (ideal timing as most cars would have just run out of warranty). £500 lighter in my wallet and everything is now fine. Part alone was £280+vat...ouch!
Just out of interest, why do technicians have to test drive your car BEFORE pluggin in the diagnostic computer? Surely, the test drive should be deployed if nothing appears on the computer. I just don't enjoy the "abuse" your engine face in the hands of these technicians, particularly when you are sat in the passenger side!
I think a MAF sensor is the Mass Air Flow meter, on the induction side (cold air). Porscheshop sell these for £146.80.
They seem to be a common problem on cars at around 4years old.
My car is still running like a dog, I replaced the coils(£181) and it's made no difference [
]. So I'm having my Mass sensor and the rest of the car checked over next week ££££££££££££££[
]
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