Cats r cut off. How to create dummy o2 sensor.

[SunlitComet]

Or you can not violate federal EPA law and put the proper converters back on. besides removing them just causes more performance issues. it effects your powerband in a negative way.

 

[saif najd]

I am not violating any laws and I couldn't find any new in the local market

So can we proceed?



The beauty of the 3rd world's


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[ccapehartusarmyINF.(ret)]

the front o2 sensors handle mixture the rear basically make sure the cats are working
to explain it better your vehicle pcm starts in open loop mode this basically ignores any siginal from the front o2 sensor and your pcm runs a rich mix untill the vehicle warms up to proper temp then it goes into closed loop and starts accepting signal from the o2 sensor to adjust the mix properly

 

[SunlitComet]

I am not violating any laws and I couldn't find any new in the local market

So can we proceed?



The beauty of the 3rd world's


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well aren't you special.

---------- Post added at 08:41 PM ---------- Previous post was at 08:31 PM ----------

the front o2 sensors handle mixture the rear basically make sure the cats are working
to explain it better your vehicle pcm starts in open loop mode this basically ignores any siginal from the front o2 sensor and your pcm runs a rich mix untill the vehicle warms up to proper temp then it goes into closed loop and starts accepting signal from the o2 sensor to adjust the mix properly

popular misconception and not accurate, entering closed loop is not engine temperature dependent. heated oxygen sensors are used because they can heat up faster and activate to provide mixture feedback. once activation temperature of the sensors have been reach it will enter closed loop mode. while coolant temp can effect change in the mixture it is not simply rich or lean, it can change it to anything in between.

 

[Gzes]

Cats are over rated... Well not my guy he just likes to sleep and go outside

 

[SunlitComet]

mine are underestimated.

 

[retorq]

LOL Removing cats causes negative performance issues ... someone better tell all the guys at the race track to put some back on so they can perform better.

Guys with cats ... you need to turn in your man cards hahahaha

 

[autolover3]

Front o2 sensors are what affect fuel misture, rear 02's monitor if cats are working. Can either get them tuned out with a PCM tune, spark plug foulers, or try what a kid in my class did and use zener diodes. His idea was to wire in a zener diode that would ground out extra voltage so the voltage going to computer would simulate a properly running catalytic converter.

Not sure if he was blowing smoke but when I drove his Tahoe there was no SES light. He had true dual straights with no cats

 

[SunlitComet]

again, the rear sensors do have an effect on the fuel trim. put the proper parts in there and stop trying to screw with your emissions system.

 

[saif najd]

Front o2 sensors are what affect fuel misture, rear 02's monitor if cats are working. Can either get them tuned out with a PCM tune, spark plug foulers, or try what a kid in my class did and use zener diodes. His idea was to wire in a zener diode that would ground out extra voltage so the voltage going to computer would simulate a properly running catalytic converter.

Not sure if he was blowing smoke but when I drove his Tahoe there was no SES light. He had true dual straights with no cats

True he is right that is my idea too, after studying how the O2 rear signal emulator works, it is the same the idea is it send or respond to the ECU so if we found away to figure how it should respond and do it then it well be solved

Sun: our talk is for off road use only and other countries (don't have emission laws)

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