6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCan a reduction in the SAI air pump flow rate throw a code?
Reported or suspected cause
bearing or just a dry bearing
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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 report identifying a cause
1
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Reported cause
mileage as the usual issue is a failing bearing or just a dry bearing on one end of the shaft.
Can a reduction in the SAI air pump flow rate throw a code?
Read full discussion summary
Leading evidence: 'bearing or just a dry bearing' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'bearing or just a dry bearing' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check first' (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.
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
After running their diagnostic procedure, shot me this message, �SAI Motor Is Excessively Noisy When Tested With Diagnostic Tool And Needs To Be Replaced Before Performing Any Other Tests�.
Can a reduction in the SAI air pump flow rate throw a code?
Test with diagnostic tool and needs
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
After running their diagnostic procedure, shot me this message, �SAI Motor Is Excessively Noisy When Tested With Diagnostic Tool And Needs To Be Replaced Before Performing Any Other Tests�.
Can a reduction in the SAI air pump flow rate throw a code?
Check first
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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
There is also a change over valve in the system and that should be checked first.
Can a reduction in the SAI air pump flow rate throw a code?
Replace pump
Suggestion or failed attempt
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 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 can easily replace the pump for much cheaper (I�ve already disassembled and greased the bearings prior to taking it in) My gut feeling is that replacing the pump won�t solve the problem as it still blows air.
Can a reduction in the SAI air pump flow rate throw a code?
Replace before performing any other tests�
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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
After running their diagnostic procedure, shot me this message, �SAI Motor Is Excessively Noisy When Tested With Diagnostic Tool And Needs To Be Replaced Before Performing Any Other Tests�.
Can a reduction in the SAI air pump flow rate throw a code?
Replace pump
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 can easily replace the pump for much cheaper (I�ve already disassembled and greased the bearings prior to taking it in) My gut feeling is that replacing the pump won�t solve the problem as it still blows air.
Can a reduction in the SAI air pump flow rate throw a code?
Test with diagnostic tool and needs
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
After running their diagnostic procedure, shot me this message, �SAI Motor Is Excessively Noisy When Tested With Diagnostic Tool And Needs To Be Replaced Before Performing Any Other Tests�.
Can a reduction in the SAI air pump flow rate throw a code?
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.
6 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: 20261027T031046Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
So I got a CEL light the other day and after a quick diagnosis determined there was something wrong with the SAI system. So off to my LN Engineering certified indy. After running their diagnostic procedure, shot me this message, �SAI Motor Is Excessively Noisy When Tested With Diagnostic Tool And Needs To Be Replaced Before Performing Any Other Tests�. So I know that it�s blowing air, it blew when I took it in, and it�s blowing air now. I assume that it blew when they tested it. Is this a red flag from the shop? Are they trying to extract another $1200 from me? I can easily replace the pump for much cheaper (I�ve already disassembled and greased the bearings prior to taking it in) My gut feeling is that replacing the pump won�t solve the problem as it still blows air.
So onto my question: assuming the pump is on the way out, and assuming the rate of flow is reduced, could that throw a code? It certainly blows a lot of air, so I doubt it�s reduced any measurable amount, but I�d like to pose the question to you fine folks.
There is also a change over valve in the system and that should be checked first. Im not really sure if flow rate is checked as part of the system. I cant see how it could be as there is no sensor for it?
Unless one writes the firmware for Porsche emission testing, it is not possible to answer this question about flow rate. It conceivably can be tested by seeing how much oxygen is detected by the O2 sensor when the SAI pump is on. But that also depends on the performance of the o2 sensor. It is probably safe to surmise that the air pump is tested for On/Off status versus how much air flow is pumped into the exhaust.
As to your comment of them wanting to stick you with a $1200 bill, that is not warranted. You took the car in for a diagnosis with an SAI error code. They found a bad/loud pump and any conscientious mechanic should mention it and make it part of the solution. Until there is for sure reliable air source, how could they tell if the diverter valve is open or not?
If you truly believe that they don't derserve that work, and it sounds like you are also capable, pay them for the diagnosis and fix it yourself.
�As to your comment of them wanting to stick you with a $1200 bill, that is not warranted. You took the car in for a diagnosis with an SAI error code. They found a bad/loud pump and any conscientious mechanic should mention it and make it part of the solution. Until there is for sure reliable air source, how could they tell if the diverter valve is open or not? �
^^^This is always a balancing act. While I agree that many shops/mechanics are simply �sales generators�, you have to acknowledge - it is their business after all. I think Yellowcab�s suggestion of paying for the diagnosis and fixing it yourself is right on the money.
I have the pump on order and will replace it before taking the car back. While I don't believe it will fix the problem, it may be on its way out, if anything.
SAI pumps are notorious on pretty much all the German marques,, and age is more important than
mileage as the usual issue is a failing bearing or just a dry bearing on one end of the shaft.
This is a source reference. Confirm exact model applicability in the original material.
