14 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoil plugs and misfire tracking
Reported or suspected cause
coil plugs (heavy permeating fog
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
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Reported cause · Original poster
Long story short my car was misfiring and it was obvious it was the coil plugs (heavy permeating fog, everything in the engine bay was wet to the touch).
Leading evidence: 'coil plugs (heavy permeating fog' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'coil plugs (heavy permeating fog' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean ), rubbing in into the surface' (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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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
He cleared the error codes, disconnected the MAF from the engine wiring harness and the codes did not reappear.
Reconnect maf and verified the error codes reappeared
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Performed · outcome unconfirmed
I'm not sure but he may have reconnected the MAF and verified the error codes reappeared.
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Suggestion
The best way is to use a thinned epoxy (with denatured alcohol) and rub it over the surface of the pack (after cleaning), rubbing in into the surface.
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.
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Suggestion
But if you want to just replace the 3 that generated the error codes and inspect the other 3 and if you find no signs of deterioration and take your chances they're ok that's understandable.
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Suggestion
Anyhow, based on the results of his testing he decided to replace the MAF and not the coil packs -- which was a pretty good leap of faith cause the coil packs are quite a bit less than a MAF -- and AFAIK the engine is running just fine with no error codes.
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Suggestion · Original poster
I very much doubt three of the coils gave up at once since it could still start and idle and I'm (read: my wife) in no mood to replace working coils just to be on the safe side.
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Suggestion · Original poster
Seeing as it's running perfectly now should I just reset the CEL and wait for it to crop up again, hopefully with a cleaner reading, or drop by a shop and see if the durametric could single out the perpetrator?
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Suggestion
Anyhow, based on the results of his testing he decided to replace the MAF and not the coil packs -- which was a pretty good leap of faith cause the coil packs are quite a bit less than a MAF -- and AFAIK the engine is running just fine with no error codes.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
coil plugs (heavy permeating fog
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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.
Reported cause · Original poster
Long story short my car was misfiring and it was obvious it was the coil plugs (heavy permeating fog, everything in the engine bay was wet to the touch).
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.
14 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: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Long story short my car was misfiring and it was obvious it was the coil plugs (heavy permeating fog, everything in the engine bay was wet to the touch). So I waited 'till it dried off and read the codes--car runs fine now that it's dry. I've got codes for misfire in 1, 2, 6, and 0 (random/multiple).
I very much doubt three of the coils gave up at once since it could still start and idle and I'm (read: my wife) in no mood to replace working coils just to be on the safe side. Seeing as it's running perfectly now should I just reset the CEL and wait for it to crop up again, hopefully with a cleaner reading, or drop by a shop and see if the durametric could single out the perpetrator?
Starting and idling easy on coils. Bad coils or other ignition maladies mostly make themselves known when engine subjected to load.
With 2 bad coils on one side and one bad one on the other side imho all 6 should be changed out. But if you want to just replace the 3 that generated the error codes and inspect the other 3 and if you find no signs of deterioration and take your chances they're ok that's understandable.
My WAG is if you leave the 3 "good" ones in service you'll be back to replace one or more shortly but that's your call.
Sincerely,
Macster.
Thing is I can't see how three coils would be bad. The car started up without hesitation but then had rough idle, exactly the way it did when one coil went a year ago. If the car were running on half cylinders I'd imagine it just wouldn't start at all.
Just strikes me as odd to see codes for three of them and makes me think that somehow the codes are erroneous.
Saw you mention this in another thread, care to elaborate?
I
agree, I'd rather buy a whole new set along with plugs and tubes. After dropping $3k on my transmission a couple of months ago though,
my wife
does not. You see my predicament.
The best way is to use a thinned epoxy (with denatured alcohol) and rub it over the surface of the pack (after cleaning), rubbing in into the surface. Then wipe excess off. There also other commercially available sealers that will work too.
Why not 3 coils? They are exposed to the same elements, harsh engine compartment conditions and are mass produced items that have nearly identical material composition, etc., and tend to age and break down at a very similar rate.
It is even worse on the 996 cause the engine is located after the rear axle and the engine and coil packs especially are subject to whatever the rear wheels splash up. Sure, the engine and coil packs are somewhat shielded but not 100%.
Now I must admit in one case when someone posted a similar situation with the misfires all on one side, all 3 cylinders, I offered the "diagnosis" of coil packs.
But the poster did a very clever thing to first eliminate MAF. He cleared the error codes, disconnected the MAF from the engine wiring harness and the codes did not reappear. I'm not sure but he may have reconnected the MAF and verified the error codes reappeared. (If he didn't he should have.)
Anyhow, based on the results of his testing he decided to replace the MAF and not the coil packs -- which was a pretty good leap of faith cause the coil packs are quite a bit less than a MAF -- and AFAIK the engine is running just fine with no error codes. So, it was MAF and not coil packs.
That all the misfires were confined to the 3 cylinders of one bank I have to admit caused me to suspect coil packs. But I was apparently wrong in my diagnosis.
Sincerely,
Macster.
JB Weld is thinner and has a longer work life than most and you can leave a thin coat of it over the entire coil. It is also easy to see if you mised a spot. Scuff surface and clean first. You can also use clear paint guard sheets that will stick securely to the coil.
