8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSecondary Air Injection Valve Question
Leading reported evidence
Smoke-test system multiple timed and can't find a leak
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
I've smoke tested my system multiple timed and can't find a leak.
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
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
Leading evidence: 'Smoke-test system multiple timed and can't find a leak' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check /' (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
And then the overall system can be tested dynamically with engine running via "Self-Test" ..
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
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
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.
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
To get to it, you have to remove the alternator and while you are at it you can check the starter alternator or Y cable.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check /
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
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
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
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
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
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
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.
8 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: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi -
I keep getting P0491 and P0492 errors. I've smoke tested my system multiple timed and can't find a leak. I do realize though, that it could be the vacuum cannister that could have a crack in it, so I'll be testing that as well, but.... here's my question.
I decided to test my SAI pump which works fine, and the Durametric will turn it on and off. However - no air is coming out of the exhaust which I read is a consequence of a stuck/failed SAI pump check valve (
99611325770). Before I go in and replace this, are there any other parts that you think could be failing that would cause this issue?
My hope is that between replacing the valve and checking/replacing the vacuum cannister, that I'll finally get rid of these codes which have plagued me for 2 years.
Its a simple system. The pump turns on, an electrical signal is sent to the change over valve (18). The valve opens allowing vacuum to be pulled on the check valve (11), thus opening it.
What to check when sai action is called for:
1. Electrical to change over is present
2. Vacuum input is pressent
3. Vaccum In other side of valve has vacuum when electic is applied.
4. Check valve open when vacuum is applied.
@De Jeeper
How do I check each of these:
1. Electrical to change over is present - via a Voltmeter?
2. Vacuum input is pressent - by hand or with a vacuum gauge?
3. Vaccum In other side of valve has vacuum when electic is applied. - with a vacuum gauge?
4. Check valve open when vacuum is applied. - not sure...
Also, did you mean to include an attachment to correspond with the numbers in your answer (18,11)?
Thanks
It sounds like there is no question that the check valve has failed because when it fails it fails in the closed position. You can test this by connecting a separate hose to the secondary hose removed from the air pump and trying to blow into it when the engine is started from cold. Also, the diagram shows there are parts #9 and #11. These have been combined into one part which is the part you referenced above. If the SAI pump is blowing air but the valve stuck, just replace the valve. To get to it, you have to remove the alternator and while you are at it you can check the starter alternator or Y cable.
The SAI system is really simple....All the Components can be tested individually on a Bench or in the car with just a vacuum hand-pump, a vacuum gauge, and a 12v battery...( if you understand how the system works and each component)
And then the overall system can be tested dynamically with engine running via "Self-Test" ..
