Werkes Exhaust on UK bike ?

[Ward]

There are O2 emulators out there that might work. For a post-cat sensor, you just need one that has the correct resistance. You should be able to read that value with an OBD scanner.

I suspect that may be easier said than done. If the ECU senses the second sensor is not recording the emissions within the range it's expecting - it won't start

 

[wjb]

Didn't Jethro Bodine of the Beverly Hillbillies convert their model A to run on water instead of gas?

I need to watch that episode again.

 

[Einar]

I suspect that may be easier said than done. If the ECU senses the second sensor is not recording the emissions within the range it's expecting - it won't start

Post-cat O2 sensors are typically used only to check if the cat is doing its job and throw a check engine if it is not. They are not normally used to impact how the engine runs--that's the job of the pre-cat sensor. I know of no vehicle that won't start because the post-cat O2 sensor says the cat isn't working correctly.

 

[TURBO200R4]

Here in the us there is California code with post-cat o2sensors.
Here in the us there the rest is federal one o2sensor.
when you first start the vehicle the first sensor and the second sensor is going to be the same reading now of you add a resistor that is going to change the reading going to the ecu. question is will it be enough difference to trigger a code.
after the cat gets hot and starts working the second o2sensor starts to work and sends voltage signals to ecu. so if you just have a resistor with steady voltage the ecu may code up because of the steady voltage (like the steady voltage when cold there is no change)
this is why i was thinking about a piggy back system with the front o2sensor. if you have a resistor atached to front sensor then it would be working
(changing) so ecu might not set a code.
now having a check engine light staying on is only a problem if you have another problem that you will not know what it is.
hth
i don't think there is a person out there that knows what you have to do to make it work correct and the only way is to jump in and try to make it work
and a lot of us had to try a lot of different things to see if it will work and that takes a lot of time.
time well spent lol

 

[rick danger]

Wouldn't the ECU be looking for a different signal from the first and second o2 sensor? To see if the cat is doing its job? Maybe the first sensor adjusts the AF ratio, and the second monitors the cat function? Just guessing here.

 

[TURBO200R4]

Wouldn't the ECU be looking for a different signal from the first and second o2 sensor? To see if the cat is doing its job? Maybe the first sensor adjusts the AF ratio, and the second monitors the cat function? Just guessing here.

when you first crank the engine (be4 the cat gets hot start both sensors should be reading close to the same)
after the cat gets hot then the second o2 will be reading the mixture after the cat has cleaned it up.

 

[TURBO200R4]

when you first crank the engine (be4 the cat gets hot start both sensors should be reading close to the same)
after the cat gets hot then the second o2 will be reading the mixture after the cat has cleaned it up.

this is what you are tring to accomplish (fool the ecu) with the 2025 ecu with the second o2sensor.
some systems on the late model cars/trucks ecu can not be defeated and some can be defeated all you can do is try.
some guys can go into the ecu and change a lot of stuff but that is not me.
there is also a way to try an earlier model say a 23 or 24 ecu that only has one o2sensor.
also may be find a 2025 with only one o2 sensor.
good luck to finding a fix for this project.
herman