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Related question - for those of us that want to completely remove the SAI components, do we remove everything in the diagram below, or do any of the items need to be retained? If the latter, which numbers?

http://www.renntech.org/loren/images/air_pump.gif

If you need to provide vacuum to the Resonance Flap - you need the Vacuum Accumulator, a vacuum source and check valve.I had linked this before & in this thread:
air intake/vacuum line routing - Pelican Parts Technical BBS
So the specific question is - what codes/performance issues are there if the resonance valve is deprived of any vacuum? The Resonance Flap(K) is electrically controlled by a solenoid (J) and receives vacuum directly from the Accumulator via a "Y" or 4-way connector.This is clearly shown in the linked diagrams from Wayne and identified by part name in his next Post in the link.

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I don't need one of these right now, but just want to commend you for coming up with a solution like this. Very inventive!

Thanks, Gelbster & particlewave.
So it sounds like my '98 just needs the block off plates for #5 and a vacuum cap where #7 attaches, then I can remove all items in the diagram.

See Post #5 in this Thread.
Mr. Stone gave us the part names and numbers that the Track Rats use and the source. You could probably make your own easily.
But we really need to field test this for a while (Particleweave will decide this not me). I mention this because a previous attempt at this SAI circuit mod failed because(?)
:" the CEL comes on after the engine has been driven for some time due to a self-test of the SAI valve that is done with the engine warm. To perform this test the SAI pump is activated but the SAI valve controlling the air flow is not opened."
In this old case, removing some electrical parts of the SAI system(Pump) caused the mod to fail. There were variations by model year (already mentioned in earlier posts) that contributed to the confusion. So we need to be cautiously optimistic.

there may also be a tipronic vacuum line. note that when you delete the sai components you also delete the bracket that the vac tank mounts to, so you'll have to find something sturdy in there and introduce a couple of zip ties to hold it in place. also not the easiest area to work in without removing at least the plenum and resonance tube.

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I already have the block off plates & gaskets, so good to go on that front.

I'm planning to rip everything out to test. Inspection isn't up until OCT so I can be a test mule for complete removal.

Sweet idea, and thread! Read it all but nowhere I found the International shipping details. Few friends here in SH who could do with this I'm sure... perfect way to get your widget on eBay the following week also, mind you :D

Let me know if you okay with that and I'll advertise availability locally, if not then so be it loll

PMs on the way. ;)

I replied in the affirmative fairly early on so I hope I don't get lost in the shuffle. Looking forward to using the part.

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Thanks - its not a rush, if I'm on the SAI list then all good. Now get to work on the post 02 sensor unit ;)


Sent from my iPad using Tapatalk

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Haven't seen PM. Did they go out already?

I had SAI codes and a "Ready Status" Fail flag so my car failed the Test-Only California Smog Test. I completed a tedious project to trace,check, repair and upgrade the entire system. Not a simple weekend task !
I fixed it all and passed Smog 5 days ago.During this honeymoon period I disconnected & plugged the SAI pump hose to simulate a failure, connected the Particlewave circuit to test it. It worked. I then disconnected it and reconnected the SAI hose.No codes. This morning the codes came back !
Knowing this may be an endless cycle of failures/fixes is not attractive.
This is why the circuit from Particlewave is useful to me. I can just fit his circuit now, delete the CEL with a simple code reader and repair the SAI system(again) when I have time .
For those curious about the SAI vacuum upgrades I made - most of the vacuum connectors are now brass and the hose is good quality 3mm silicone.Should outlast the car -& me ! I also rebuilt the SAI pump and have a rebuilt spare. TheSAI pump still operates perfectly - I can hear it.The vacuum system which is easy to test(but tedious to fix) still holds perfect vacuum. So it is probably the electric change-over valve, or.......
For the Durametric users - if you are looking for the pre-cat O2 Sensor voltage to prove that the air injection system is working/failing - remember two things
1. The ports in the cylinder head can plug with carbon(mine is a newly rebuilt M96 so no problem.
2. To see the graph of the flat wave form change to sine wave(the proof) on the pre-cat sensor - start the car at the coldest possible temperature and be really fast with your keyboard skills.At Los Angeles summer temps you have no more than 5-10 seconds before the flat wave changes to sine wave in my experience. If you are slow you may make an incorrect diagnosis.

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Your efforts are much appreciated!

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Payment sent, thanks! I wonder if this would also work for the 996 (I might need one for such a beast).

Paypal sent, thanks!

Paypal sent. Thank you.

Subscribed for the Oxygen sensors hack!! Let me know if/when one is ready, I have some friends that might be interested too :)

Amen! I'd buy a pair today if there was something like it on the market!

(Might be courteous to start a new thread on this since it's off-topic to the original post)

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I was Particlewave's tester for the SAI circuit. If the O2 sensor circuit is as effective ,it is a very useful device.
I was not trying to cheat the Smog Laws. I was up against a deadline for the Smog Test and needed the 'sticker'' so I could continue working on fault finding. Without a "Pass" of the Smog Test and the precious sticker, your out of date one makes you CHIP bait.Expensive !
The other problem is the "Drive Cycle". If you research this ,you will see comments that it is a potentially dangerous/impossible procedure in urban areas.
Particlewave's circuit allows a more leisurely approach to solving the SAI issues.
For the O2 sensor circuit, the situation is similar. I had O2 sensor codes despite a newly rebuilt engine and 4 new sensors,coils,plugs etc. I needed to pass Smog to get the sticker, to continue working on a fix. The only hack available is anti-foulers. These are clearly visible and an instant huge penalty in the Visual part of the Test. You do not want to do that ! In my case the O2 code seems to have been aberant but when that comes up on your way to the Test you have no way of knowing it. Just clearing the code resets all the Readiness Monitors to "Fail" - it is a useless reaction.
The O2 Sensor circuit is easily removable/reversible just like the SAI circuit. It is therefore a great aid to gaining the time to diagnose and fix the problem.
Without the O2 problem-solver circuit , you might mistakenly buy 2 new catalytic converters - a huge and needless expense.
The other caution is that we don't know the long term effect of running with these problem-solvers circuits connected. I expect the SAI circuit would be totally harmless despite the brief unburnt HC. There are adverse comments about cheapo O2 code MIL eliminators(EBay) but Particlewave's test circuit should not be confused with those.
http://www.ebay.com/gds/Truth-about-O2-simulators-/10000000002812356/g.html
I hope this perspective helps others understand the justification for the SAI problem solver circuit and similar devices as a diagnostic tool.
Thanks to Particlewave for helping us.

Here, it is exactly that we are trying to do to. Not because we want to kill the world, its just to keep our modded cars on the roads for an extra year - or at least until we buy another less polluting one. So far the advertised technique locally that work every time is to mix your gas tank with alcohol (5gas:1alcohol ratio) and heat up the crap out of the cats/exhaust before the inspection.

My box just passed 3 months ago. Has performance 200cells cats and modded exhaust so you could also call this trick worthy. Burns cleaner than a Tesla :D

Downside: 100% alcohol is not exactly cheap. A circuit might be the solution lolll

I'd like to be the added to o2 list please.

Would it work on a 987.2 Cayman R too?

My brother has one with catless headers and gets a CEL obviously.

If so then may he up for 2 02 circuit kits....posted to UK.

O2 problem solver huh, I want a pair for 2001-2.7 if they will work on it.

Did I miss out on the install instructions?? It may be quite obvious and I have yet to get under the hood today to look.

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Any progress with O2 sensors? :)

Looks like the thread went silent

I ran into a few snags a have been busy with another project. Will get back to it as soon as possible. ;)

SAI circuit tester
 

I would be very interested in purchasing one of your SAI circuit tester units. I have been through many attempts to fix this problem including disassembling the top of The motor/manifold/Replacing various bits and pieces, smoke checking and all to no avail. Please send me the details on how to obtain one of your units. Thanks, Chrishttp://986forum.com/forums/uploads02...1513884330.jpg

funny. i was just thinking about that this morning.
i need one too if you got it to work.

Hi Particlewave. I'm interested in the SAI bypass. I've been having the codes pop in and out for the problem for too long. If you are making more please include me on the list.

Is your SAI device still available? please let me know, as I would be very interested in purchasing one. Thank you.