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99 Failing CA Emissions?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH99 Failing CA Emissions?

Leading reported evidence

Run (self install)

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
What does a new one run (self install).
Original post Read captured discussion
99 Failing CA Emissions?

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Leading evidence: 'Run (self install)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run (self install)' (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 · 8 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Test done at a porsche dealership

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
I am having a full PPI with a compression test done at a Porsche Dealership before I purchase.
Original post Read captured discussion
99 Failing CA Emissions?

Test drive the 6pd

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
Look over RMS past and test drive the 6pd to make sure there is no noise issues.
Original post Read captured discussion
99 Failing CA Emissions?

Frequently discussed actions (3)

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

Run (self install)

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
What does a new one run (self install).
Original post Read captured discussion
99 Failing CA Emissions?

Test done at a porsche dealership

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 am having a full PPI with a compression test done at a Porsche Dealership before I purchase.
Original post Read captured discussion
99 Failing CA Emissions?

Test drive the 6pd

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
Look over RMS past and test drive the 6pd to make sure there is no noise issues.
Original post Read captured discussion
99 Failing CA Emissions?

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.

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: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am about to buy a 99 996 with 48k miles; pulled a car fax and it recently failed emissions in CA. I was told by the seller that is is common for Porsche's to fail here and there. Is this true? If there is something wrong it's prob the MAF? What does a new one run (self install). I am in Las Vegas so emissions are not as strict as CA but I dont want to get stuck w/ a car that wont pass....... Thanks for your replies, Jeev

POST 2Original post

Have him take the car in for an emissions test and see if it passes. It is illegal in many States to sell a car if it is known to have failed the test. Have the seller provide proof of recent pass.

POST 3Original post

99 should have no prob. need to know why did not pass. visual, no2, cel, co2 are all reasons for failure

POST 4Original post

car stock or modded?

POST 5 / ORIGINAL POSTEROriginal post

As far as I know engine and exhaust is stock.........

POST 6Original post

You should investigate some more and not take the car unless it passes with flying color. My 02 w 17k mi had CO and NO2 reading that barely detectible. 996 should are LEV and should not fail unless it's modded or something isn't working. Also, investigate the car's service records. Look over RMS past and test drive the 6pd to make sure there is no noise issues.

POST 7 / ORIGINAL POSTEROriginal post

Thanks for everyones help. I am having a full PPI with a compression test done at a Porsche Dealership before I purchase.

POST 8Original post

There are plenty of 99. You are better off going w a 01 or better yet 02 if you can afford it. Shop around and don't fix yourself on only one car.

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