8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1999 Boxster 2.5L - Trouble codes for mis-fire - Emission Relevant???
Leading reported evidence
Check engine warning
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Today I got these codes when scanning the check engine warning.
Leading evidence: 'Check engine warning' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check engine warning' (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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Suggestion
Pull the easiest spark plug from that list and check the gap.
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 · Original poster
Will check plugs and change coils with correct new plugs later and will post results.
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
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Suggestion · Original poster
Will check plugs and change coils with correct new plugs later and will post results.
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
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Suggestion
Nah, I'd have a smog cert as proof that the car is running properly.
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.
8 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
Today I got these codes when scanning the check engine warning. Does anyone has had this happen like this and what you think it could be. Obviosly the chances of all 6 cylinders misfiring at once is pretty slim to none. Perhaps its bad coils and plugs that is throwing the ignition sequence off? Any thoughts or insights?
My car is a 1999 Boxster base manual transmission 2.5L Thanks!
P1313 Misfire, Cylinder 1, Emission Relevant
P1314 Misfire, Cylinder 2, Emission Relevant
P1315 Misfire, Cylinder 3, Emission Relevant
P1316 Misfire, Cylinder 4, Emission Relevant
P1318 Misfire, Cylinder 6, Emission Relevant
P1319 Misfire, Emission Relevant
Thanks will post on Boxster Forum as well! I just got the car and tried to smog it in CA but these codes came up. Will check plugs and change coils with correct new plugs later and will post results. Thanks!
I'm gonna go out on a limb here and suggest that you got burned - this is based on having lived in California my entire life without having bought or sold a car that didn't pass emissions. The only REAL reason not to do it properly - i.e. as a seller, getting the car smogged up front - is because it won't pass. I could see skipping a smog cert for an old pickup or something, but a Porsche? And a Porsche with an engine design KNOWN to be flawed and tremendously expensive to fix? Nah, I'd have a smog cert as proof that the car is running properly. Unless I couldn't.
I would CAREFULLY document the condition of the car right now, including the condition of the coolant and oil, and explore whether you have any recourse at all with the seller. If this was a private-party, as-is, no warranty sale, I advise you to carefully consider any advice you get from other people here BEFORE you allow anyone to tear into the car and start fixing things.
Also, when the first shop tells you not to worry because it's just a head gasket: It's not just the head gasket.
Sure, it's POSSIBLE that you just have cracked coil packs and they were ALL wet, or crap in the fuel tank, or some other benign and easily curable situation - but then you'd have a coincidence. And there are no coincidences with used cars - just untold stories.
This is a source reference. Confirm exact model applicability in the original material.
