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Secondary air injection '99 996

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

Discussion summary

YOUR RESEARCHSecondary air injection '99 996

Leading reported evidence

Disconnect vacuum hoses

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 just finished replacing all the parts of my secondary air injection system and I have a spare disconnected vacuum line.

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Secondary air injection '99 996
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Leading evidence: 'Disconnect vacuum hoses' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect vacuum hoses' (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 · 4 captured posts examined · 0 partial discussions

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Run cel codes p0410 and p1411

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 was running CEL codes P0410 and P1411.

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Secondary air injection '99 996
Frequently discussed actions (2)

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

Disconnect vacuum hoses

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 just finished replacing all the parts of my secondary air injection system and I have a spare disconnected vacuum line.

Original post Read captured discussion
Secondary air injection '99 996

Run cel codes p0410 and p1411

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 was running CEL codes P0410 and P1411.

Original post Read captured discussion
Secondary air injection '99 996
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.

4 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: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I just finished replacing all the parts of my secondary air injection system and I have a spare disconnected vacuum line. It's the main vacuum supply that feeds the check valve which then goes to the vacuum canister. It probably connects to the intake manifold,.....somewhere. anybody know?

POST 2Original post

Yeah.... It's located left of the plenum (left of the throttle body)

POST 3Original post

Hope this helps. Coming from the four way connector, one goes to the canister, one is sneaky and goes to Part #996 605 123 01 that's really close to the canister. One connection goes to the rear of the car on the drivers side and connects to a value that's attached to the intake. The two remaining connections (numbered 29 &19 in the diagram)are: in the front of the engine on the resonance tube (the other tube thats behind the plemum) and the final line sneaks around to the right side of the engine near the rear part of the right intake. Here's a link to why I know, it has extra photos too.: https://rennlist.com/forums/996-foru...nge-out-2.html

POST 4 / ORIGINAL POSTEROriginal post

Got it, it's line #29 in diag and it does in fact plug into that intake manifold joint at the bottom. It's tricky to plug in with fat hands and the dipstick tube in the way. But it's a runner again, and no CEL's! I was running CEL codes P0410 and P1411. I replaced both of the air pump valves and both of the electrically vacuum control valves. The actual failed part however, was the vacuum control valve that controls. It's part #11 air pump "shut off valve". The rubber diaphragm was ruptured. Crummy job, but the key to making it "pleasurable" was to drive the alternator bushing toward the front of the car. Alternator pops right in and out.

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