I was browsing around, and found this.
http://www.o2simulator.com/index.php...products_id=17
Curious if this will work.

I looked in the FSM but couldnt find too much.
"Engine accelerated = .5 - 1.0v"
"Engine deaccelerated = .0- .5v"

So with this adjustable O2 simulator you could set your low at say .3v and your high at .7v for example. What frequency the ECU looks for...I have no idea.

Guinea pigs anyone?

 

it will not work on our car. the pcm uses both o2 sensors to check.

 

The front is a Air fuel ratio sensor, this views oxygen content in a much wider and accurate window 0-5v. An O2 sensor views oxygen content in a 0-1v scale.
The PCM will look at oxygen content compared to the two sensors, I agree.

The rear O2 sensor is just there to monitor the Catalytic converters' efficiency and doesn't really need to be entirely accurate. I think this O2 simulator will work very good if it does cycle the voltage at the correct frequency.

Typically catalyst monitors are done randomly and over a long period of time, IE: Every 25 key cycles, when engine is operating temp, when cruising/idle.

I'm going to contact them to see if they've had any success with RX-8s and see if they'll honor a refund if it does not work.

Just looked at their website, they do honor a refund if it does not work.

 

How did you go with this?

 

The RX8 doesn't use a typical O2 sensor. The sensor at the cat is actually a WRAF sensor:

http://www.aa1car.com/library/wraf.htm

 

I'm with 586. I don't believe you can have a dual Lambda input to a ECU. It would make no sense to function as a second O2. I have removed them (the cat along with the O2) on many a make and model car and nothing happens. We replace our O2 sensors before each race season just for insurance. Typically when they fail it is a slow loss of sensitivity, not a catastrophic. Hard to measure but good cheap insurance to insure a correct L value is being heard by the ECU

 

Hrmm...viprez let me know if you end up ordering it and if it does anything for your S1. I would be willing to give this a shot on an S2 pending your results.

 

Decided this was too expensive. And didn't like running catless.

When my catalytic converter dies, I'll go with the DR RB midpipe and give this a whirl.

 

The only tbing it will adjust effectively is your bank account

 

Care to explain? Seems like a pretty legit O2 simulator. You can adjust the frequency/cycling it does, along with the minimum and maximum voltage.

Have you ever looked at an O2 sensor graph? it's pretty smooth "on and off" or high and low. Match the acceptable range and frequency and boom, no CEL. Pick an average low and and average high - you're still in OEM spec.

The only thing I could see the PCM doing is something like a self check - comparing B1S1 to B1S2.

It's definitely an expensive route I agree. But no one has disproved it yet, or provided sufficient FACTUAL data that it will fail.

 

or you could just get an access port, tune the car, and disable the codes... Seems like a more useful investment to me for S1 users.

 

I am under the impression that an O2 sensor placed after a working catalyst shouldn't cycle rich-lean like that.
Considered an aftermarket wideband with programmable analog outputs? The Innovate products seem to be capable of spoofing such signals, and have other nice features.

 

It doesn't read rich/lean. It monitors oxygen content. The front air fuel sensor cycles rich/lean. Which is different for every car whether its high voltage = rich or low voltage = rich.


Funny I didn't mention anything about that in my thread. Perhaps it's cause many people know this is the only viable solution for running cat-less without a CEL.
So why not explore a cheaper alternative? That would be wrong hey.

 

Nobody has done the opposite yet either. How about either posting up something factual or canning it until somebody does?


.

 

If you want to be pedantic, it doesn't monitor oxygen content either. The point is was trying to make is that the output signal shouldn't look sinusoidal.

 

When and if my catalytic converter fails I'll be the first to let you know if it works or doesn't.

I'm trying to remain optimistic while you utterly blurt out it will fail upon your own opinion?

I'm not trying to be disrespectful or start a childish forum troll/flame war - but when someone says it won't work...when it theory it should - I would like an explanation.

That's too much to ask isn't it.

What non-factual data have I not provided yet either?
Did I start the thread posting nonsense, opinion, or far-fetched theory. Didn't think so.