10 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Reported or suspected cause
ignition coils
Reported cause
No successful repair reported for this finding.
1
Identified cause
1
Suspected cause
0
Reported fixes
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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
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.
Reported cause
Had similar issue on my 986S which turned out to be coil packs.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Read full discussion summary
Leading evidence: 'ignition coils' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'ignition coils' (1 discussions; 1 report identifying it and 1 suggest it). The most frequently discussed action is 'Check plugs and leads' (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
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 went back to the garage, they checked plugs and leads, used some contact cleaner and test drove it a couple of times but couldn't find an issue.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Use i can't remember the brand of oil they
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
I haven't checked the oil level as my parking isn't particularly flat, I don't know which brand of plugs they used, I can't remember the brand of oil they use but it was a fully synthetic 5w40.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Use some contact cleaner
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 went back to the garage, they checked plugs and leads, used some contact cleaner and test drove it a couple of times but couldn't find an issue.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Check the leads were probably last done
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 · Original poster
It's back in on Wednesday for them to check, the leads were probably last done when last serviced by Porsche 5-6 years ago...
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Use but it was a fully synthetic 5w40
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 · Original poster
I haven't checked the oil level as my parking isn't particularly flat, I don't know which brand of plugs they used, I can't remember the brand of oil they use but it was a fully synthetic 5w40.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
Use i can't remember the brand of oil they
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
I haven't checked the oil level as my parking isn't particularly flat, I don't know which brand of plugs they used, I can't remember the brand of oil they use but it was a fully synthetic 5w40.
986 S down on power and misfire after service - Page 1 - Boxster/Cayman - PistonHeads UK
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.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
2 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Following changing them on my car everything was straight back to normal.
I had the car serviced by garage down the road last week - oil, filters and plugs.
I thought it seemed a bit down on power afterwards on a short run, but drove it for the first time this morning - on hard acceleration it really struggled - it usually picks up at about 4k rpm which seemed exaggerated today, and then at higher revs it started to splutter and misfire.
Is there anything particular to this engine (2001 3.2) or just standard stuff?
I haven't checked the oil level as my parking isn't particularly flat, I don't know which brand of plugs they used, I can't remember the brand of oil they use but it was a fully synthetic 5w40.
It's back in on Wednesday for them to check, the leads were probably last done when last serviced by Porsche 5-6 years ago... thoughts?
Assuming they have done everything correctly re oil, filter, plugs, etc.... If they changed the plugs they could have accidentally broken a coil pack, or the leads could have been refitted incorrectly. Or they might have accidentally dislodged or damaged one of the vacuum lines, perhaps less likely. My first port of call would be the coil packs. If they haven't ever been changed then perhaps worth changing them anyway.
Had similar issue on my 986S which turned out to be coil packs. Overtime with the heat and where they are situated in an exposed area it doesn’t take much for one to start to fail. Following changing them on my car everything was straight back to normal.
Thanks, I was thinking damaged / loose lead.
No check engine light came on, will the misfire still have logged?
With the coil packs, are Porsche OEM best or does it matter?
Thanks
I haven't driven it much as only use it for commuting, but it's still not right.
It went back to the garage, they checked plugs and leads, used some contact cleaner and test drove it a couple of times but couldn't find an issue.
The following day I drove it and it seemed fine. Didn't drive it for another week as Xmas etc, then drove it again yesterday and didn't misfire but low rev is a little lumpy and mildly down on power.
I think it only had a new MAF a couple of years ago.
One thing is that the electronic oil level indicator light shows one bar over full on completely flat ground, dipstick looks at max fill line. Is it worth draining out a filter's worth of oil?
Worth just putting on a new set of leads?
Thanks
I can’t see that the oil level is causing your problem.
As others have said, I too suspect a faulty coil pack. They crack over time and removing it to, replace the spark plugs has exacerbated the fault.
