8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHGot P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace coil and displaced the tube a bit
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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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 performed work without a confirmed outcome
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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.
Got P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Replace coil and displaced the tube a bit' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check coil packs and wires' (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
Plugs were changed at 60k Just did an oil change before i went to the track.
Got P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check coil packs and wires
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
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Suggestion
Well I would start by checking the coil packs and wires.
Got P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace before i went
Suggestion or failed attempt
No successful repair reported for this finding.
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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 contain suggestions
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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
Plugs were changed at 60k Just did an oil change before i went to the track.
Got P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run like this everytime i start it up
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
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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
I know this might sound odd, but i've had a boxster for 2 years that has run like this everytime i start it up.
Got P300, P301 P303 codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261027T033922Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Was driving along, stopped at a traffic light and all of a sudden it started idling a little rough and the CEL started to flash and the computer said to drive slowly to service
Started to drive and after about 100 feet, the light went out and the engine was smooth again.
I was about 1 mile to my home, drove home and plugged in my durametric
There were 3 codes
This is the first time I have gotten ANY codes
I did a weekend at the track a week ago and all was good
I have 74k on the clock,. Plugs were changed at 60k Just did an oil change before i went to the track. All the oil changes (4)I have done since i bought the car in March 14 have been good
Any thoughts????
I know this might sound odd, but i've had a boxster for 2 years that has run like this everytime i start it up.
Code reader stated cylinder 3 misfire.
We took (1) coil from an old engine that came from another boxster in our garage, and popped in a new MAF that we had bought a while back. This thing runs like a top now. The MAF is pretty expensive so i wouldn't go for that first, but i did both at the same time so i can't say what caused it.
I got my MAF wet a little while ago, and threw the same codes, and idled really rough. Took it out, and gave it a good clean, and left it to dry over night. In the morning she was good as new.
That bank is on the same side as the coolant overflow tube. I had this problem once with a cracked coil pack and a burp from the coolant tank. I changed the coil and displaced the tube a bit.
If the problem is cracked coils and them getting wet, I suppose I could spray some water up that side of the engine when it is running and see if it throws a code
Is that a good idea?
On another forum, someone suggested it might have been an injector as well
This is a source reference. Confirm exact model applicability in the original material.
