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Slightly Fluctuating Idle, Vacuum Leak ?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHSlightly Fluctuating Idle, Vacuum Leak ?

Leading reported evidence

Clean iacv

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've cleaned the MAF, cleaned the IACV, tightened every hose clamp, ensured every vacuum line was firmly in place, and I have no codes.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

Read full discussion summary

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

Read captured replies

1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Clean mass air flow sensor

Performed · outcome unconfirmed

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've cleaned the MAF, cleaned the IACV, tightened every hose clamp, ensured every vacuum line was firmly in place, and I have no codes.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

Replace maf and iacv over

Performed · outcome unconfirmed

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 even swapped the MAF and IACV over from my 1999 Boxster Base to my 996 with no effect on the idle issue.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

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.

Clean iacv

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've cleaned the MAF, cleaned the IACV, tightened every hose clamp, ensured every vacuum line was firmly in place, and I have no codes.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

Clean mass air flow sensor

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've cleaned the MAF, cleaned the IACV, tightened every hose clamp, ensured every vacuum line was firmly in place, and I have no codes.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

Replace maf and iacv over

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 even swapped the MAF and IACV over from my 1999 Boxster Base to my 996 with no effect on the idle issue.
Original post Read captured discussion
Slightly Fluctuating Idle, Vacuum Leak ?

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.

5 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: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

When I was filling up my 996, I notice the idle kind of dipped and rose. Is this a sign of a vacuum leak ?

POST 2Original post

I'm having the same issue with my 1999 996 C2, idle meanders between 750 and 800 rpm, and when driving and I let off the gas the rpms drop to about 500 before coming back up to 750. I've cleaned the MAF, cleaned the IACV, tightened every hose clamp, ensured every vacuum line was firmly in place, and I have no codes. I even swapped the MAF and IACV over from my 1999 Boxster Base to my 996 with no effect on the idle issue. I'm obviously missing something. The car runs fantastic other than this one issue.

POST 3Original post

I don't get it. You left the car running at idle and filled it up, then the idle dipped and rose? Do not fill up your car with the car running. Evap control valve - purge the system.

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 16952083

Not what happened.

POST 5Original post

What year is your car? Do you have cable throttle body or e-gas?

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