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p0303 code cylinder 3 misfire - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHp0303 code cylinder 3 misfire - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace spark plugs

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
Im going to try to change the spark plug and test the coil, can anyone tell me which plug is cylinder 3?
Original post Read captured discussion
p0303 code cylinder 3 misfire - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

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

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1 matching discussions · 7 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Test coil, can anyone tell me

Suggestion or failed attempt

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
Im going to try to change the spark plug and test the coil, can anyone tell me which plug is cylinder 3?
Original post Read captured discussion
p0303 code cylinder 3 misfire - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace spark plugs

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
Im going to try to change the spark plug and test the coil, can anyone tell me which plug is cylinder 3?
Original post Read captured discussion
p0303 code cylinder 3 misfire - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test coil, can anyone tell me

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
Im going to try to change the spark plug and test the coil, can anyone tell me which plug is cylinder 3?
Original post Read captured discussion
p0303 code cylinder 3 misfire - 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.

7 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Im going to try to change the spark plug and test the coil, can anyone tell me which plug is cylinder 3? Is this the correct diagram, left one on the passenger side?

POST 2Original post

Quotes source post: 448235

Rearmost on passenger's side (US car).

POST 3Original post

Not Canada??

POST 4 / ORIGINAL POSTEROriginal post

well I just pulled the coil and its slightly cracked..ordering new ones, hopefully it will fix the problem

POST 5Original post

You can clear the code and swap the possible bad coil with another and see if the code follows the bad coil. If so, then you'll know that you found the root cause.

POST 6Original post

Why does that diagram show the oil filler tube and manifold intake facing forward? Canadian car?

POST 7Original post

Quotes source post: 448300

The diagram is for a 996 engine. The giveaway is the oil filler tube, throttle body intake, and power steering fluid dipstick are all on the belt side. Here is a 996 pic with the air box removed (the red arrows point to the engine mounts).

This is a source reference. Confirm exact model applicability in the original material.