Removing A/F Sensor from exhaust.
- Thread starter b-eock
- Start date
alexk
Weekend Rider
That would be the O2 sensor.
While I'm not an expert on our ECU or the PCV, I can look at it from an automotive perspective and say it would be very bad(tm) on a car.
On an OBD I/II system (are bikes OBD?), once the engine warms up, it operates in closed-loop mode, in which the engine continuously adjusts the fuel mix to ensure its as lean as possible (to save fuel) whilst avoiding detonation (to save the engine). While there are air/fuel maps in automotive ECUs, the fine tune is done by the O2 sensor - there are always differences in MAF current requirements, fuel rail pressures, and injector tolerances, but an O2 sensor will always send a cross at the same ratio.
Hence, at least on a car, removing the O2 sensor would cause a check engine light, massive amounts of fuel burn to avoid engine damage, a drop in mpg, the fouling of a catalytic converter, and a black coating on the back of the car.
I can't see our bikes as being that much different. =\
While I'm not an expert on our ECU or the PCV, I can look at it from an automotive perspective and say it would be very bad(tm) on a car.
On an OBD I/II system (are bikes OBD?), once the engine warms up, it operates in closed-loop mode, in which the engine continuously adjusts the fuel mix to ensure its as lean as possible (to save fuel) whilst avoiding detonation (to save the engine). While there are air/fuel maps in automotive ECUs, the fine tune is done by the O2 sensor - there are always differences in MAF current requirements, fuel rail pressures, and injector tolerances, but an O2 sensor will always send a cross at the same ratio.
Hence, at least on a car, removing the O2 sensor would cause a check engine light, massive amounts of fuel burn to avoid engine damage, a drop in mpg, the fouling of a catalytic converter, and a black coating on the back of the car.
I can't see our bikes as being that much different. =\
Stangrrr
Weekend Rider
Are you asking if you can delete the O2 sensor? As Alex explains above, you can't leave it off, it's required by the computer to adjust the fuel parameters (maybe even timing?) when in closed loop mode. Aftermarket exhausts should have a "bung" on them already to reinstall the O2 sensor. If not, one can be welded on and the O2 sensor can be re-installed.
If you're asking about difficulties in removing it from the stock exhaust so it can be moved to an aftermarket exhaust, there is a slim chance that it would be difficult, but since our bikes are only a few years old, chances are it will come off easily. If it is difficult to remove, a little heat applied with a propane torch will help it come off easier.
If you're asking about difficulties in removing it from the stock exhaust so it can be moved to an aftermarket exhaust, there is a slim chance that it would be difficult, but since our bikes are only a few years old, chances are it will come off easily. If it is difficult to remove, a little heat applied with a propane torch will help it come off easier.
Rabbitman109
Lumen Junkie
You would get an error code. You can get an O2 optimizer to plug in where the O2 sensor plugs into now, and that would avoid the code.
Rabbitman109
Lumen Junkie
Most of the time, he is installing an O2 bung if you are using auto tune. If not, if you go with a PCV, it includes an O2 optimizer to go around it.
Rabbitman109
Lumen Junkie
Then you should have gotten the small clear connector that goes where the O2 sensor plugs into...
Should look something like this: https://cart.dynojet.com/p-840-oxygen-optimizer.aspx
master paper clip
New member
That's the o2 optimizer he is talking about, it's a black Box on the fz8
Marthy
Member
If you use a PCV you should disconnect the O2 sensor and use a O2 optimizer. You will end up correcting the A/F with the PCV and the ECU will try to change it back.
I can instal an O2 sensor (M18) for the Autotune no problem... I always have a few in stock.
Shit!!!!
Oh, thanks! I ordered some O2 sensor bung and couldn't remember unpacking them with the 4ft tube and 3 collectors I bough... they were still in the box.... in the trash!
Ouf! I needed them for one of the exhaust I need to built tonight! That would have F*&^ me over big time!
I can instal an O2 sensor (M18) for the Autotune no problem... I always have a few in stock.
Shit!!!!
Oh, thanks! I ordered some O2 sensor bung and couldn't remember unpacking them with the 4ft tube and 3 collectors I bough... they were still in the box.... in the trash!
Ouf! I needed them for one of the exhaust I need to built tonight! That would have F*&^ me over big time!
master paper clip
New member
Wait so if I have a pcv without the auto tune, your telling me I should disconnect the stock o2 sensor if I have the O2 optimizer installed ??
Rabbitman109
Lumen Junkie
That is the way that it reads for an FZ1, so I would assume it is the same for the FZ8
master paper clip
New member
Would that be a reason why my idle isn't always steady till after I been riding a little... It's not horrible just has a lope to it... After a little riding it idles normally
lyric911
New member
You do not disconnect the stock O2 with PCV. The O2 optimizer is plugged in line with the stock O2.
http://www.powercommander.com/downloads/22-040/install/pcv/eng22-040.pdf
Rabbitman109
Lumen Junkie
The FZ1 and FZ8 are more different than I thought.
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