O2 Simulator. Does anyone make a direct unit?
 

Im wanting to ditch my cat for a nice midpipe, but I dont want to have to deal with a CEL. Does anyone know if there is a direct plug in o2 Simulator for the RX-8? Or if there is one that will work with it. Does anyone know what voltage the PCM sees from the downstream o2 when it is normal? any help would be nice.

The Cobb AccessPORT is the only way to disable the CEL from illuminating.
Some '04 models have had luck with a CEL not coming on, but its rare.

Ive thought about the Cobb Accessport or a flash from Racing beat (i know they wont disable it tho). can you change when the cooling fans kick on with the Cobb unit? That would be the main reason for the flash

Why is that? My CEL rarely comes on in my '04 and i've always wondered why.

Sorry OP, minor thread jack

I have heard many say the AP was the only way to keep the CEL off while running a mid-pipe. But while scanning through sites the sell mid-pipes and high flow cats, I saw that Rotary Performance sells an O2 simulator. Has anyone tried that? any luck with it? here is the link
http://rx7.com/store/rx8/rx8exhaust.html

click on the link above then click on the link for the dyno results. They list the simulator there, for about 30 dollars.

Thanks

+1
However my PCM did learn not to read the code on its own. I've been driving without the O2 code for almost 3k (I have an '08).

I should install my Cobb, its only been sitting around for well over a yr LOL

Can anyone explain to me - in 50 words or less - why stupid, vapid, ignorant threads like this one keep getting started over and over and over again?

After 7 years of production and hundreds of thousands of RX-8s sold, are there really people that are so green and so lazy that they think that questions like this one haven't been asked and answered already?

Does the OP really believe that no one has had this discussion already?
Or is it that they have such little respect for the community that they feel entitled to have their indolence placated?

Lazy...you said it yourself :)

My search came up with no results. An hour of searching showed alot of people curious but no solution other than a $500 programmer. I need an O2 sim. They make them for almost every car out there.

I have a few questions.

Why is it that this is the only forum I have seen that when someone asks a question looking for help there are always people that have to put them down? Is it not the reason for a forum to help people? Or is it just to be rude to people that have better things to do than read every post as it goes up?

You found no other results because there aren't any!
We've been trying to tell you that and you're not listening!
Many have tried the O2 sim and it doesn't work on our car.
Maybe it has something to do with how it utilizes the RO2S like this illustrates:
Attachment 158537

Most of the time its in good fun... just some people are too sensitive and take everything serious and flip out.
All you need is a little tough skin and not take what others say serious and you'll be fine.
We've seen times where the same question was asked, in the same section of the forum, multiple times in one day.
If they would have simply looked a couple threads down, they would have seen the same question.
That kind of stuff does get frustrating... especially when that person comes back hours later asking "Anyone?"
Time they wasted waiting could have been spent searching... but some people want to be spoon fed everything in life.

I admit that it appears that some people come on here to start arguments... but what can you do... thats what you get on any kind of forum.

I asked incase someone has came across one that works. I didnt see anything recent.

If we knew the voltage the PCM must see something could be made that haslight variations to it that will keep the "O2 sensor stays at center" code from coming on. Most O2 sensors are made like ours now.

I was wondering if anyone has tried anything new or had luck finding one that was premade to run inline with our downstream O2.

The problem is, the question has been asked dozens of times and answered completely and totally in a definitive manner.

Its like a kid in the back seat saying "Are we there yet?" over, and over again.

^ +1

Topics like this do get a little redundant.

OP- Mazda did their homework when they engineered this car for the most part. There aren't many if any short cuts when it comes to the power-tran and electrical components in this car.

Sounds like YOU are the one with little respect for the community. Why do you feel the need to come up with some insulting diatribe. Either answer his question or hit your browser's back button. It's as if no one is allowed to post in this forum unless it's something brand new. Have you ever thought that because there are so many threads in this place it actually makes it HARDER to find the information you need because a simple search turns up hundreds of posts completely unrelated to the subject?

In summery, it's getting old seeing you put people down thread after thread just because a questioned was answered before. Chill the fuck out!

On this forum people like to have pissing contests for no reason. If I wasn't one of the very first members(literally) I'd have moved on. This place used to be awesome.

I understand that but when the kids been asleep for awhile and no one asks for awhile then thiers a always a chance the answer might be yes.

Even just 2 years ago thier was very few people makin stuff for this car, just hopin someone might have stepped up and made a unit for it.

It doesnt hurt to check back every once in awhile to see if someone made one. Sorry If I offended you by asking a question you had heard before. When someone does make one I guess we will never know because people like you trying to police a forum that was made to help people not treat them bad just because theres nothing else to do.

I was curious, I'll just make one. Was hoping I could get away without having to go through the trouble.

Good Luck with that..I'm sure you would be able to sell quite a few of them if it works

It is definitly not going to be something simple...or mechanical that will do the trick....

Its just a self varible resistor that goes between .3-.7V or 2.3-2.7V. nothing major. Ive built them for Dodge Vipers, SRT-6 Crossfires, SRT-8 Chargers that run the same type or 4 wire O2 sensor. Just need to hook up my scanner tomorrow and see what Voltage range the PCM normally sees and use the 5V input and a varible resistor to change the output that the PCM sees. Then get a pigtail for both ends of the O2 sensor, weatherproof it and poof done.


Thats all thats done with the nice O2 sims that actually work. I just perfer to buy them instead of build them.

Helps when you are a Master Technician with a degree in electrical engineering.

Well... keep us posted on your progress and we'll be awaiting your results.
Make sure you test it on other years besides '04 since those are known to not produce a CEL.

I dont know anyone else with a RX-8 but I might make 2 and find someone close by to check it out on an 06-07. In theory you should be able to find a nice 4 wire inline O2 sim and switch the pigtails so you can hook it to the car and O2 sensor to get it to work. It has to be inline for the Heater circuit to work properly. It is a pain to make a proper fake signal to send to the PCM for the heater circuit. But these O2 sims are $100+ then you have to either hack your own harness or order pigtails for the O2 harness and Sensor to splice on the O2 sim.

I think you will find it will still throw a CEL ....the PCM uses a test protocol that needs specific feedback signals to defeat.....

The answer is NEVER yes. When you get there, the parents will tell you.

HE'S PERSISTENT..GOTTA GIVE HIM THAT..... Maybe he will beat his head against the wall long enough to actually make something that works some of the time :)

I think the confusion lies in what the rear O2 narrow-band sensor is doing here as compared to the old narrow-band sensors on the previous OBD-II cars.

In theory, if the sensor is still in place and functioning properly, you could hijack its output and force it to be slightly leaner than its actual output. This would give you a longer window before the PCM figured it out and threw a CEL.