Rennlist

What's that noise?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHWhat's that noise?

Reported or suspected cause

secondary air injection pump (sai)

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

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 suspect a cause: 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.

Suspected cause
If it is first start when cold the noise is most likely the Secondary Air Injection pump (SAI).
Original post Read captured discussion
What's that noise?

Frequently discussed work

Clean /resurrecting them

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
There are a couple of DIY threads on disassembly/cleaning/resurrecting them.
Original post Read captured discussion
What's that noise?

Read full discussion summary

Leading evidence: 'secondary air injection pump (sai)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'secondary air injection pump (sai)' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean /resurrecting them' (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 · 7 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Clean /resurrecting them

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
There are a couple of DIY threads on disassembly/cleaning/resurrecting them.
Original post Read captured discussion
What's that noise?

Frequently discussed actions (1)

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

Clean /resurrecting them

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
There are a couple of DIY threads on disassembly/cleaning/resurrecting them.
Original post Read captured discussion
What's that noise?

Reported and suspected causes (1)

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

secondary air injection pump (sai)

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause
If it is first start when cold the noise is most likely the Secondary Air Injection pump (SAI).
Original post Read captured discussion
What's that noise?

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.

7 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

When I first start the car I can hear a hum. It lasts about 15-20 seconds and generally stops when I drive off.

POST 2Original post

That's the sound of the on-line banking system emptying your bank account!

POST 3Original post

RUN!! ITS GONNA BLOW! If it is first start when cold the noise is most likely the Secondary Air Injection pump (SAI). It injects air upstream of the cats to help them "light off" quicker. I think they are timed to run for up to 2 minutes if conditions warrant. You may also hear it at other times, like after coasting down from speed on off ramps etc. When these pumps get dirt filled or bearings start to go dry they can sound like an angry small vacuum cleaner. There are a couple of DIY threads on disassembly/cleaning/resurrecting them.

POST 4 / ORIGINAL POSTEROriginal post

It is at first cold start. I hope you guys aren't trying to scare me!! I just got the car a week ago!!

POST 5Original post

Just a little 996 humor... See here: http://www.renntech.org/forums/tutor...-sai-easy-diy/ Good luck

POST 6Original post

Secondary Air Pump... Totally normal noise till it shuts off or starts to wear out. Where are you located... Maybe another member can walk you around the car and give you some tips and more info on some stuff...?

POST 7 / ORIGINAL POSTEROriginal post

Quotes source post: 12031308

. ..I'm in Kingwood, Tx on northeast side of Houston

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