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YOUR RESEARCHemission control warning light - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Replace coils over

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Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
The diagnostic said there was a fault with cylinder 4 so he changed the coils over on 4 & 6 and put a new spark plug on 4.
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emission control warning light - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Replace coils over' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace coils 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.

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Frequently discussed actions (1)

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Replace coils over

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
The diagnostic said there was a fault with cylinder 4 so he changed the coils over on 4 & 6 and put a new spark plug on 4.
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emission control warning light - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

986Forum: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

Hi all, New to this forum so please be gentle :-) Recently had a top end rebuild on my 2000 yr Boxster S (2 valve springs had broken) and car running fine again until last week when I started it up and noticed it felt a bit "lumpy". It was running at quite high revs which isn't unusual when cold, so I didn't think much of it. 5 mins down the road and the emission control warning light came on (only found out it was this when I looked in the manual!). I drove back home as didn't want to damage anything - recent problem still firm in memory! I called the garage who had done the work and they said it may be a faulty oxygen sensor but that I'd need to hook it up to an ECU to confirm. I called a Porsche specialist near me and they said to drive it down as wouldn't do any damage and they'd have a look for me. The diagnostic said there was a fault with cylinder 4 so he changed the coils over on 4 & 6 and put a new spark plug on 4. Reset everything and appeared to be ok. 3 days later and the car suddenly felt lumpy again and the warning light came back on. Anyone any ideas what it could be? Do you think it's an isolated problem or could it be related to the top-end rebuild? Don't know whether to take the problem up with the garage that did the rebuild (200 miles away!) or take it back to the my local garage. Any advice / thoughts welcome! Thanks.

POST 2Original post

Hook it to the diagnostics again...the problem may be cylinder 6 now, as the coil pack could have been bad in the first place and needs to be replaced.

POST 3Original post

... with the code diagnosing is easier. Happy Boxstering, Pedro

POST 4 / ORIGINAL POSTEROriginal post

thanks - don't know what the specific code was but think I'll have to take it back to the local garage and hook it up to the ECU again. The coils were only replaced a year or so ago and the guy said they looked find and that he doubted it was those.

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