YOUR RESEARCHAir Injection/ vacuum tank pipe work
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
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1 matching discussions · 9 captured posts examined · 0 partial discussions
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.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Does anyone know what the theory is behind the air injection, vacuum tank system on a 1999 996 C4 3.4L? I�m trying to figure out how to pipe up all the small diameter tubes. Driving crazy! Every bit of info I can find on the net is not for my engine.
There's a post here somewhere that shows the entire system - I don't remember the thread offhand but if you do a search you should be able to find it...never mind, see below Is this^^^ what you're looking for? Also, here http://www.autoatlanta.com/porsche-p...section=108-05
Mate! That�s exactly what I was looking for. I searched everywhere but nothing as clear as that. I had visions of swapping pipes over and over for hours. Thanks for you help!
Google is your friend Good luck!
Here is another picture
I�m glad you put this up. I think! The previous post shows two change over valves. Mine only has one. However this post involves the fuel pressure regulator which mine has. I�m assuming the over change over valve operates fuel by pass. Thank you for the reply!
No. See where the blue line is? A single hose from underneath the plenum goes to the fuel pressure regulator.
Ok! Not sure why the plenum pressure is operating the fuel pressure regulator but I�ll go with it. One question remains, when comparing the two systems why has the first have two change over values and the second just one?
A is the vacuum supply from the vacuum canister...B is for the operation of the resonance flap. The plenum is not under "pressure" but is under vacuum (or negative pressure).
This is a source reference. Confirm exact model applicability in the original material.
