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1999 Carrera Misfiring On One Cylinder

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10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH1999 Carrera Misfiring On One Cylinder

Leading reported evidence

Replace fuel injectors as preventative maintenance

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

I just replaced all my fuel injectors as preventative maintenance.

1999 Carrera Misfiring On One Cylinder
Frequently discussed work

Check number 5 injector is the next step

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'm thinking checking the number 5 injector is the next step but I'm hoping perhaps someone may have some insights that I may be missing--anything helps at this point.

1999 Carrera Misfiring On One Cylinder
Read full discussion summary

Leading evidence: 'Replace fuel injectors as preventative maintenance' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check number 5 injector is the next step' (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 · 10 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace oil/filter

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 also changed the oil/filter because with the amount of fuel that was being dumped into that cylinder there was definitely a risk of contamination, and misted the cylinder with oil prior to startup to mitigate any fuel wash.

1999 Carrera Misfiring On One Cylinder

Check number 5 injector is the next step

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

I'm thinking checking the number 5 injector is the next step but I'm hoping perhaps someone may have some insights that I may be missing--anything helps at this point.

1999 Carrera Misfiring On One Cylinder

Inspect cylinder 5 and 6 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

However, after inspecting the cylinder 5 and 6 plugs again, it's clear that number 5 is still soaked with liquid fuel and number 6 is normal.

1999 Carrera Misfiring On One Cylinder

Replace 6

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

I�m replacing all 6 because the car is sitting at 100k and it�s definitely time.

1999 Carrera Misfiring On One Cylinder
Frequently discussed actions (6)

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

Check number 5 injector is the next step

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'm thinking checking the number 5 injector is the next step but I'm hoping perhaps someone may have some insights that I may be missing--anything helps at this point.

1999 Carrera Misfiring On One Cylinder

Inspect cylinder 5 and 6 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

However, after inspecting the cylinder 5 and 6 plugs again, it's clear that number 5 is still soaked with liquid fuel and number 6 is normal.

1999 Carrera Misfiring On One Cylinder

Replace 6

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�m replacing all 6 because the car is sitting at 100k and it�s definitely time.

1999 Carrera Misfiring On One Cylinder

Replace fuel injectors as preventative maintenance

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

I just replaced all my fuel injectors as preventative maintenance.

1999 Carrera Misfiring On One Cylinder

Replace oil/filter

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 also changed the oil/filter because with the amount of fuel that was being dumped into that cylinder there was definitely a risk of contamination, and misted the cylinder with oil prior to startup to mitigate any fuel wash.

1999 Carrera Misfiring On One Cylinder

Run along and noticed a loss of power

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

My friend--the owner, who was driving it--was running along and noticed a loss of power.

1999 Carrera Misfiring On One Cylinder
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.

  • 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All, Got an interesting problem I'm hoping someone can shed some light on: I'm working on a 99 Carrera that has been experiencing a misfire on Cylinder 5. My friend--the owner, who was driving it--was running along and noticed a loss of power. In the time it took him to pull over, the check engine light came on (flashing) and the car started billowing smoke from the bank 2 exhaust. He had the car towed and the codes I pulled showed a Cylinder 5 misfire damaging to the catalytic converter (codes 54, 67, 62 and 75). The car is not burning oil, but rather an excess of fuel--to the point that straight gasoline literally spurts out of the tail pipe at idle. I swapped the coil and plug from cylinder 5 to cylinder 6 to see if the code would follow, but the car is no longer throwing any codes (no check engine light). However, after inspecting the cylinder 5 and 6 plugs again, it's clear that number 5 is still soaked with liquid fuel and number 6 is normal. I also checked the resistance of the coil packs and they are both within spec., so I'm fairly confident that isn't the issue. I'm thinking checking the number 5 injector is the next step but I'm hoping perhaps someone may have some insights that I may be missing--anything helps at this point. Thanks very much, Ian

POST 2Original post

Plugs and coil packs are common issues for these cars. I just replaced all my fuel injectors as preventative maintenance. Not uncommon for those to go bad either.

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 17774315

Thank you for the reply! Just an update, I pulled the number 5 injector and blew into the end and I was able to blow right through it. Unless I�m mistaken, these injectors should be closed when they aren�t energized so I�m thinking that this one being (apparently) stuck open is causing the flooded condition�

POST 4Original post

I'm impressed you got injector number 5 out by itself. I had trouble getting to it after the intake manifolds were off!

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 17775400

Thank you 🙏🏼 I just changed all 6 injectors in my personal 997 a couple of months ago so I�ve got the technique down 😄

POST 6Original post

Did you get it fixed? I'm guessing you are waiting on finding injectors. There has been a shortage.

POST 7 / ORIGINAL POSTEROriginal post

Yep, still waiting on the new injectors to arrive. I�m replacing all 6 because the car is sitting at 100k and it�s definitely time. I�ll update this thread once I get everything back together

POST 8Original post

Save the other 5 and send them out for cleaning.

POST 9 / ORIGINAL POSTEROriginal post

Quotes source post: 17777501

Thanks for the advice 👍🏼

POST 10 / ORIGINAL POSTEROriginal post

Just an update in case anyone is interested: I dropped the new injectors in and the car runs perfectly so that stuck number 5 was definitely the culprit. I also changed the oil/filter because with the amount of fuel that was being dumped into that cylinder there was definitely a risk of contamination, and misted the cylinder with oil prior to startup to mitigate any fuel wash. Luckily my buddy caught it and had the sense to have the car towed before any really serious damage occurred.

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