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Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHBoxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace of my o2 sensors this last summer due

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Performed · outcome unconfirmed
I replaced all of my o2 sensors this last summer due to a simular hunting problem.
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Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Adjust its air/fuel mixture and is unable

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Suggestion
As a result the RPM starts "hunting" looking to adjust its air/fuel mixture and is unable to and will sometimes cutoff.
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Replace of my o2 sensors this last summer due' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Adjust its air/fuel mixture and is unable' (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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Adjust its air/fuel mixture and is unable

Suggestion or failed attempt

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Suggestion
As a result the RPM starts "hunting" looking to adjust its air/fuel mixture and is unable to and will sometimes cutoff.
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check codes and said 2 relay had

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Suggestion · Original poster
I have a 99 boxster tiptronic with 21000km.I haven't drove it for 3 month.I finally took it out a few weeks ago and at a red light the check engine light came on and the car just stalled.On another occasion another red light the rpm went down and up again as if the engine were strugleling.On the highway sometime,the check engine light would light up for a second,feel a small jerk and light goes off without stalling.Only stalls on a complete stop(on drive and park).I brought it to the porsche dealership.They kept it for about a week because it had not stalled on them.When it finally did,they checked the codes and said 2 relay had to be change.Made the repairs,2 days later the same problems co
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace sensors

Suggestion or failed attempt

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
No improvement I might suggest start by replacing your sensors.
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Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (4)

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Adjust its air/fuel mixture and is unable

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
As a result the RPM starts "hunting" looking to adjust its air/fuel mixture and is unable to and will sometimes cutoff.
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check codes and said 2 relay had

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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 have a 99 boxster tiptronic with 21000km.I haven't drove it for 3 month.I finally took it out a few weeks ago and at a red light the check engine light came on and the car just stalled.On another occasion another red light the rpm went down and up again as if the engine were strugleling.On the highway sometime,the check engine light would light up for a second,feel a small jerk and light goes off without stalling.Only stalls on a complete stop(on drive and park).I brought it to the porsche dealership.They kept it for about a week because it had not stalled on them.When it finally did,they checked the codes and said 2 relay had to be change.Made the repairs,2 days later the same problems co
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace of my o2 sensors this last summer due

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 replaced all of my o2 sensors this last summer due to a simular hunting problem.
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace sensors

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
No improvement I might suggest start by replacing your sensors.
Original post Read captured discussion
Boxter problem.I need your help please. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

6 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: 20261027T031046Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a 99 boxster tiptronic with 21000km.I haven't drove it for 3 month.I finally took it out a few weeks ago and at a red light the check engine light came on and the car just stalled.On another occasion another red light the rpm went down and up again as if the engine were strugleling.On the highway sometime,the check engine light would light up for a second,feel a small jerk and light goes off without stalling.Only stalls on a complete stop(on drive and park).I brought it to the porsche dealership.They kept it for about a week because it had not stalled on them.When it finally did,they checked the codes and said 2 relay had to be change.Made the repairs,2 days later the same problems comes back.So before I bring it back to the dealer.I would like you advice on what may be wrong.I think it might be the o2 sensors or the fuel pump.I do not wanna pay for other costly repairs I don't need. Thanks for any advice guys.

POST 2Original post

Sounds to me like the o2 sensor or sensors. From the sound of the throttle hunting some at idle that is usually cause by a bad sensor or potentially bad gas. I might suggest putting a fuel additive in your next fillup and see how it acts. No improvement I might suggest start by replacing your sensors. I might start with the Mass Air flow sensor and maybe look into the sensors on your exhaust.

POST 3Original post

What relays/parts were replaced. Part numbers if you have them.

POST 4 / ORIGINAL POSTEROriginal post

Tool Pants: I not sure but I remember I will try to find out. I don't understand how o2 sensors can cut an engine off(I am not familar with mechanis)And why this happens only when I am to a complete stop??

POST 5Original post

Well that is when it would happen. At low RPM's the o2 sensors try to adjust and are unable to. As a result the RPM starts "hunting" looking to adjust its air/fuel mixture and is unable to and will sometimes cutoff. I replaced all of my o2 sensors this last summer due to a simular hunting problem.

POST 6 / ORIGINAL POSTEROriginal post

There is 2 o2 sensors right?? Do you remember how much it cost?? Thanks for your advice.I appreciate it !!

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