10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAOS Failure?
Leading reported evidence
Replace aos and spark plugs
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.
Leading evidence: 'Replace aos and spark plugs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check aos function (and engine health)' (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 contain suggestions
1
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Suggestion
As stated above, a manometer is a foolproof tool to check AOS function (and engine health).
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.
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Suggestion
Search for checking the health of your AOS with a manometer.
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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Suggestion
And if testing the blow-by for engine health, a digital manometer with a scale of up to 50 inH20 ( 2 PSI) is required...There are some available for about $40 bucks that work very well..I use one exactly like this.....
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
And if testing the blow-by for engine health, a digital manometer with a scale of up to 50 inH20 ( 2 PSI) is required...There are some available for about $40 bucks that work very well..I use one exactly like this.....
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.
10 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: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey all. Have an 02 Targa that has excessive oil consumption. After doing some research, I investigated AOS failure. Removed the oil cap while running and encountered a loud whooshing sound and rise in idle. Is this pretty concrete evidence of an AOS failure? Just want to make sure before I go digging into the engine to replace it. I attached a video of the oil cap being removed while running. Thanks!
The oil cap made a very loud �sucking� sound when removed, as well as a squeaking air sound when removing. I replaced the AOS and spark plugs. Plugs were heavily fouled and intake manifold had a ton of oil in it. Despite replacing it, the oil cap still makes a air rushing sound and has a slight bit of suction when removed. Im fairly certain I replaced the AOS right, and wouldn�t a vac leak/loose hose cause less suction on the crank case anyways? Just wondering what could cause this.
As stated above, a manometer is a foolproof tool to check AOS function (and engine health). You'll need a 2nd oil fill cap to modify and the test is simple. Search posts by Porschetech3.
OP the manometer test is the only way to positively verify function of the AOS....period..
The "slack tube" tester shown above is good only to verify a "good functioning" AOS... ( but I have always liked it !!...It shows the user has a good basic understanding of scientific methods and Physics of Automotive functions,,,BUT if testing a failing AOS, you would need a much much larger/taller slack tube..)
.Normal readings are 4-6 inches of water for factory AOS, 3-5 inches of water for UAOS, but " failing AOS's" can be as high as 25 or 50 inH20 or even on a completely blown AOS 400 inH20 ( 29 Inhg)!!! So you would need a slack tube 400 inches high ( 33.4 ft tall) to insure accurate readings and not to suck water into the intake...
And if testing the blow-by for engine health, a digital manometer with a scale of up to 50 inH20 ( 2 PSI) is required...There are some available for about $40 bucks that work very well..I use one exactly like this.....
Amazon
Amazon
