6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH03 996 4S compression test results
Leading reported evidence
Replace about 11k 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
It was decided the problem was a bad coil so I told the shop to replace them all (it had all plugs replaced about 11k miles ago).
Leading evidence: 'Replace about 11k miles ago)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'best bang' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check car over' (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
So, if I'm so paranoid about the motor in this car, why have I still got it after 7 years???........it's because it's such a damned nice car and probably the best bang for the Porsche buck on the face of the planet!!
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
It was decided the problem was a bad coil so I told the shop to replace them all (it had all plugs replaced about 11k miles ago).
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
During the work I asked the shop to run a comp test to give me some idea of the condition of the motor and check the car over for ANY other issues.
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
During the work I asked the shop to run a comp test to give me some idea of the condition of the motor and check the car over for ANY other issues.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
best bang
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
So, if I'm so paranoid about the motor in this car, why have I still got it after 7 years???........it's because it's such a damned nice car and probably the best bang for the Porsche buck on the face of the planet!!
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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Just had the test completed and got readings of 235/235/232/235/235/235. Test was performed by an ex-Porsche main dealer lead mechanic who now owns his own business.
Have searched the forum but couldn't find any "spec" numbers to compare my results against. Car has done just over 101k miles and runs great, having just had all the coils replaced.
Anyone any data on what is regarded as excellent vs not so?
your results are excellent. The actual number is variable on many different things, so for compression tests, you want a tight grouping, which is what you have.
you're good.
As others have said, its more about the values relative to one another. Lots of things can impact the actual compression reading, such as the condition of your battery and how fast the engine cranks during the test. You're really just looking to make sure they are all pretty much the same - and in this case I don't think you could ask for much better than the results you got.
Just curious - what prompted you to have a test done?
I was taking the car in for a coolant leak and on the way the car started bucking really badly and the check engine light started flashing on and off. Scared the crap out of me (probably because I'm now so programmed into believing this M96 motor will self destruct if you so much as look at it the wrong way). Managed to get the car to the shop (the problem gradually cleared up on the way) and upon diagnosis it was found that the computer had logged a misfire on #1. It was decided the problem was a bad coil so I told the shop to replace them all (it had all plugs replaced about 11k miles ago). During the work I asked the shop to run a comp test to give me some idea of the condition of the motor and check the car over for ANY other issues. Results came back and the shop tells me the car is just about tip top!
So, if I'm so paranoid about the motor in this car, why have I still got it after 7 years???........it's because it's such a damned nice car and probably the best bang for the Porsche buck on the face of the planet!! I've gone back and forward with keeping or selling and so far, keeping has won out. I've done just about everything that has been suggested that is most likely to give problems with the car, other than "the solution" although I do have the ceramic bearing in there. So, there you have it.
And just out of interest, and perhaps some of you folks have seen the same thing.......I got an email from the Porsche main dealer around the middle of last year telling me that Porsche now consider anything over ten years old as "classic" so if I wanted to sell it they'd be happy to do that for me, for a fee of course.......hmmmm.....:-)
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