Porsche Forum Australia

CIS Airbox Leak - Smoke Test

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Original source

3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCIS Airbox Leak - Smoke Test

Leading reported evidence

Install backwards

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
and the blowoff valve was installed backwards..
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Read full discussion summary

Leading evidence: 'Install backwards' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install backwards' (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 · 3 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Repair i don't think it

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 · Original poster
I don't think it was repaired...
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Repair done

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
Looks like it cracked and had a patch up repair done.
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Test stand

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 would pull the engine and install on the test stand...
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Frequently discussed actions (4)

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

Install backwards

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
and the blowoff valve was installed backwards..
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Repair done

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
Looks like it cracked and had a patch up repair done.
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Repair i don't think it

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 don't think it was repaired...
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

Test stand

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 would pull the engine and install on the test stand...
Original post Read captured discussion
CIS Airbox Leak - Smoke Test

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.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Forum Australia: 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I acquired a car a short while ago with the stock CIS. Car runs well but has high idle speed, which even with the idle bleed screw CLOSED, is still around 1200 rpm when warm! Also, removing the oil cap, made no appreciable difference to the idle speed... Hence, vacuum leaks. I spent some time removing the airbox and all his friends from the engine bay and decided after getting it out, that I wouldn't bother attempting to reinstall it all in the car.... I would pull the engine and install on the test stand... may as well do a valve clearance check etc too. Here is a video I made (sorry, it's not up to the standards of Jeff!) but it shows the leaks on the airbox and also around the pop off valve ... Feel free to scroll through to around halfway to really see the leaks. Another thing I learned, is that baby oil in liquid form might smell nice, but in smoke form, it lingers and is nasty!

POST 2Original post

Looks like it cracked and had a patch up repair done. leaks around blowoff valve from the mounting screws?

POST 3 / ORIGINAL POSTEROriginal post

I don't think it was repaired... and the blowoff valve was installed backwards.. and with very little glue it seems... it's now in the trash.... Engine is back in the car, and hoping to get it buttoned up and fully back on the road today .

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