Fake O2 signal Generators

[mruwka]

Need help...
Long time ago i came across an advertisement, which showing off a plug in device which generated a believable O2 signal for racing cars. Dose any one know anything about it?????

Please help..

[drag1320neon]

ive heard about them, i think the summit catalog might help, well call them instead

[Self]

They're called O2 Sims(simulators). Common to see them on cars with removed/gutted cats. They plug in and fool your ecm into thinking the cat(s) is/are there still. Without them, the real sensors will register a malfunction and you will get a check engine light. Not really detrimental to your car's performance, but the light is annoying if you ask me.

[Partizan]

Also aren't they for if you have an external BOV that vents into the atmosphere to prevent your engine from running lean by thinking those exhaust gases ae still there?

[JekylandHyde]

Well, I can only speak for the MR2 .... that O2 sensor is after the turbine amd before the cat, so the 02 doesn't know a thing about the cat.

It doesn't make sense to me that an O2 would ever be aftera cat.

Also, the O2 only affects A/F on the MR2 at idle and while steady cruise ... so there is zero performance to be gained there.

[drag1320neon]

welllllll, thats because your car is not obd2 almost all obd2 cars have two cats, one pre and one post cat

[JekylandHyde]

The Turbo MR2 does have 2 cats ... but you are correct, it is not OBD2.

[drag1320neon]

Originally Posted by JekylandHyde

The Turbo MR2 does have 2 cats ... but you are correct, it is not OBD2.

dude, dude, my fault, i didnt mean cats, i meant o2 sensors, big fuck up on my part

[JekylandHyde]

Well now that's it. How am I suppose to deal with his kind of a mistake?
I'm sorry ... but I have just lost all respect for you

KIDDING!!!!!!!!!!!!! No biggie, thanks for the clarity.