Any one heard of these things, if so where the H do you get one?

STU

 

Here you go... http://www.diabloautosports.com/prod...oducts_id=2198

It works quite well according to my friends that have used it, no CEL light as of yet.
Austin

 

Any idea how these work?

 

ditto

 

Well...accordint to the information it states:
"Unlike, most O2 simulators on the web that use a 555 timer, the O2Sim utilizes a RISC processor to exactly simulate the oxygen sensor outputs from the catalytic converter. This eliminates check engine light problems common with high flow catalytic convertors and test-pipes! The O2Sim computes various vehicle sensor parameters in real-time to mimic the oxygen sensor outputs."

I beleive that you splice this into your wire harness and it figures out what your 2nd O2 sensor should be reading...then it transmitts it to your ecu, thus fooling the ecu into thinking that it's using the 2nd O2 sensor.
Austin

P.S. if you have any more questions I'm sure that a post in the Forced Induction forum will yield you quite a answers as the actual manufacturer and the retailer of these regularly post on Honda-Tech.

 

thks austin, i figured it must do something along those lines.

 

The O2 sensor changes its resistence based on the chemical reaction taking place in the exhaust. It only reads air. The resistence is then converted to voltage for the computer to read. In its simplest form you can make one for next to nothing. All you need to do is figure out what resistence is on your O2 at .5v (neutral), go to Radio Shack and buy the appropriate resistor. Many people sell these with a plug for $30-$50 and are used mostly on OBD II cars so they can get rid of the downstream O2. The device in the ad appears to randomly "swing" the signal. This can be a plus because the way a computer senses a bad O2 is either by no signal or a signal that doesn't swing. It has no other way of knowing the O2 is bad.

 

But it could give you a faulty catalytic converter code.
Austin