Rear O2 Sensor Simulation

[Pacman]

I bought a header for my car and being an OBDII vehicle, I know that it'll throw the P0420 for catalyist effeiciency. I'm looking at O2 simulators and found some on eBay (I know linking is restricted). The one I'm looking at for $65 takes care of both O2 wave and heater operation.

Now, has anyone used these? I know some of the other OBDII guys have a header, what do you use?

I'm also looking at getting a S13 cat to install in where my dummy cat is just so I don't shoot flames out and maybe control the smell (cause flames and smell flag police!), whats the thought on this.

[Gorilla Unit 33]

wouldnt using a spark plug fouler take care of throwing that code?

[projectRDM]

Using an S13 cat works fine, or buy a replacement one, but either way you need to weld the O2 bung in the rear section of it. The rear O2 must see a change from the primary in order to cancel the code. I've seen simulators before on some cars but never one on an S14, so I can't say for sure how well that idea works.

[Pacman]

Using an S13 cat works fine, or buy a replacement one, but either way you need to weld the O2 bung in the rear section of it. The rear O2 must see a change from the primary in order to cancel the code. I've seen simulators before on some cars but never one on an S14, so I can't say for sure how well that idea works.

Would the stock S13 cat be enough to keep the O2 from throwing the code? It doesn't get that hot down stream as opposed to were it is from the factory so lighting the cat off may take longer or show its working inefficient. I just really don't like MILs (or any other warning light) staring me in the face while I drive, my eyes get pulled to them, and since I'm a gauge/mirror watcher, it makes it worse. Have you seen any simulator on an OBDII car and how well did it work?

[chibo]

I've used one of the simulators before and it worked fine. There is a guy that released a schematic to build one that simulates the right wave to pass and it costs five or ten dollars to build. I'm on my phone now otherwise i'd get you the link.

Probably outside this thread but I'm considering simulating as much as I can on a obd2 ka ecu.......

[projectRDM]

Would the stock S13 cat be enough to keep the O2 from throwing the code? It doesn't get that hot down stream as opposed to were it is from the factory so lighting the cat off may take longer or show its working inefficient. I just really don't like MILs (or any other warning light) staring me in the face while I drive, my eyes get pulled to them, and since I'm a gauge/mirror watcher, it makes it worse. Have you seen any simulator on an OBDII car and how well did it work?

Anything to alter the ratio between the sensors works fine. I've used RT cats before on customer's cars only because the rest of the exhaust is upgraded and they wanted larger flanges. An OE one would work if you don't mind having to drill the studs out which inevitably break off when removing them from said S13.

[Pacman]

Chibo, hook it up with the schmatic/link if you can. You've used that particular schmatic or something similar? Does it take care of the O2 heater as well?

RDM, what are the RT cats from? I have acess to a drill press so I'm not to worried about drilling.

[chibo]

http://mkiv.com/techarticles/oxygen_sensor_simulator/index.html

The heater is more involved.

[projectRDM]

Chibo, hook it up with the schmatic/link if you can. You've used that particular schmatic or something similar? Does it take care of the O2 heater as well?

RDM, what are the RT cats from? I have acess to a drill press so I'm not to worried about drilling.

RT = Random Technology. Aftermarket supplier. They make a nice one that fits our cars, it's cataloged as the 95-99 Maxima but it's a direct fit and available in 3" inlet/outlet. They can also prefit the O2 bung if you order direct.