15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMultiple Misfire Issues...
Reported repair
Replace only one coil pack and plug
Reported resolution
1
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 report a fix
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 fix
Only one coil pack and plug were replaced, which solved the problem.
Leading evidence: 'Replace only one coil pack and plug' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, the most frequently mentioned possible cause is '1 coil pack went bad' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace only one coil pack and plug' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Replace only one coil pack and plug', supported by resolution reports in 1 discussions. 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 report a fix
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 fix
I had something similar to this years ago and replaced all my packs and plugs - issue went away.
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.
Reported cause
I had the same issue, and it turned out to be 1 coil pack went bad.
Replace /coil pack inspection showed only one cracked coil pack
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
Subsequent plug change/coil pack inspection showed only one cracked coil pack which I changed out.
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.
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.
15 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: 20261027T022239Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
So after 18 months of ownership, I've had my first real problems with the C4S. On my way into work, it started idling pretty roughly and a few minutes later threw a CEL warning and told me to drive to the dealer.
The dealer has had a for a 2 days and the codes that were thrown indicated multiple misfires on the left bank of cylinders. They've had a look and have not yet found the cause and the next step is for them to run a compression test.
Anyone have any faint clues as what it could be? Luckily the car is under CPO warranty and hence not to worried about the cost!
Also the dealer was pretty good and has me in an '10 Cayman S loaner. I must say that they Cayman has impressed me quite a bit especially in the Sport Plus mode!
coil(s), lifter(s), cam timing, intake leak, coolant in cumbustion chamber, broken valve spring(s)
CPO = dont sweat it....drive the rental car, what did they give you
My guess would also be a bad coil pack, especially if it was raining when your car threw its CEL. (It does rain in BC, right?
). The water causes the bad pack to start arcing, causing the misfire.
I had this happen on my '02 Cab...intermittent CEL, codes showed various misfire issues. Subsequent plug change/coil pack inspection showed only one cracked coil pack which I changed out. Since then (3 months and 2500 miles), no CELs and much joy.
Good luck.
The PO of my car had issues with coil packs and arcing. Only one coil pack and plug were replaced, which solved the problem. Lucky you have the CPO. Who know what of a multitude of things it could be. Good luck.
Electrical, ignition related, most like coil pack as that's the most common. The best news is that there was no unusual mechanical noises, no smoke or steam coming out the exhaust and no oil dripping from under the car.
It is perplexing the dealer couldn't determin this within a few minutes. I hope I'm right.
Odd indeed that the dealer is perplexed, perhaps they were stalling for their service dept.
I had something similar to this years ago and replaced all my packs and plugs - issue went away.
This is a source reference. Confirm exact model applicability in the original material.
