Planet-9

pinging/detonation?

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHpinging/detonation?

Leading reported evidence

Replace gas stations and cursing the unavoidable 10% ethanol

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Unsuccessful attempts: 1
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Suggestion
keep changing gas stations and cursing the unavoidable 10% ethanol
Original post Read captured discussion
pinging/detonation?

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Leading evidence: 'Replace gas stations and cursing the unavoidable 10% ethanol' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace gas stations and cursing the unavoidable 10% ethanol' (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 · 1 partial discussions

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Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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Suggestion
and a fresh reset of the
Original post Read captured discussion
pinging/detonation?

Frequently discussed actions (2)

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Replace gas stations and cursing the unavoidable 10% ethanol

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
keep changing gas stations and cursing the unavoidable 10% ethanol
Original post Read captured discussion
pinging/detonation?

Reset of the

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
and a fresh reset of the
Original post Read captured discussion
pinging/detonation?

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.

Planet-9: 1 discussions

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2 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link
I may want to get this resolved first.
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Generation: 20261026T091943Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Once again, I'm hearing a small sound. The paranoid person that I am, I am thinking about it rather than letting it go. 1. It is not related to warm up. Happens at operating temperature. 2. It does not seem related to gas. I have tried every 93 station I could find. 3. It is very intermittent. Highly doubtful I could demonstrate it to a dealer at will. 4. I have no modifications. Engine has been generally babied. 5. It happens after I've been off the throttle for a while (say on a downhill). When I get back on the throttle moderately, I hear a pinging/detonation like sound, but only once, almost a key clanging. If I get off the throttle and get back on again, I cannot reproduce it. If I had to guess, I'd say it's a one time ping - happens perhaps once per driving day. The conditions generating it are similar to the air gasp sound - but that requires higher speeds. Perhaps it's the 10% ethanol that's everywhere? I'm tempted to a. try an octane booster (no idea what it does if anything) b. techron injector cleaner c. keep changing gas stations and cursing the unavoidable 10% ethanol It's not a huge, huge deal. If I'm not sure that I can reproduce it, it must not be the end of the world. What stresses me is that I'm on the list for the software/plenum mod... I may want to get this resolved first. It is not the same sound that I started a thread on a year ago. That really was a very minor exhaust rattle: http://www.planet-9.com/cayman-complaints/9122-slight-sound-engine.html

POST 2Original post

If for arguments sake, if it is a ping(knock) then the ECU will retard the timing straight away which is why it would not happen for some time after.

POST 3Original post

Yes, 4x4, that would be consistent wouldn't it? I guess I'm wondering if anyone else is getting this sound. I'm buying gas (only 93) in NNJ. I've tried Shell, Sunoco, BP. To clarify, the air gasp sound may require a quicker but similarly moderate application of throttle. Most audible in 4th & 5th, perhaps due to airflow? You can literally hear the engine suck air in. Lovely, soulful car. This rare ping if it is a ping, is annoying me though.

POST 4Original post

I get it too, I have always gotten it. 94 Octane makes no difference. I am not 100% sure it is pinging. I will post the question in the Tech Section.

POST 5Original post

I don't believe I have heard it, but wasn't listening for it either. Of course it will never hurt to bring it into the dealer for a read out of any codes from the ECU and a fresh reset of the ECU . Solves some little things sometimes.

POST 6Original post

Consider this thread closed, we're continuing at http://www.planet-9.com/cayman-tech/22944-engine-pinging.html

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