| Author | Message | |||
     Biondo78 |
Afther spend many times for tuning my bike with ecmspy... I set o2 sensor , white cable , troublecode . Bike go very well , solid idle 1050 ,cold start well , no dip . Is dangerous for bike o2 sensor disable ?  | |||
| Xl_cheese |
leave the o2 on. | |||
| Ferocity02 |
I agree, leave it on so your bike can adjust it's fuel mixture properly to account for different riding conditions. What is "White Cable?" | |||
| Mnbueller |
Ferocity02 - I read somewhere it is a european modle thing. Aparently they have some white wire in them that limits power, or does something for emissions. Removing this white wire seems to boost performance. | |||
| Teeps |
You can adjust the 02 set point to a higher value, a couple of hundredth's of a volt is all that is needed. This will trick the ECM into thinking the engine is lean, therefore adding more fuel. Here's what a modified eprom looks like. Only do this if you accept all risks.  | |||
| Id073897 |
I'm pretty sure, this will be of no help. The target voltage is almost never hit directly. In some applications sensing the target value indicates an O2 sensor failure. Regards, Gunter | |||
| Xl_cheese |
Why are the target voltages there if they are not doing anything? | |||
| Id073897 |
a) to detect errors b) to devide the full voltage range in a lean and a rich part c) as an input to some control algorithms | |||
| Xl_cheese |
So why do you say that changing the target voltages won't do anything? The ecm is zigzagging the mix across the midpt. You raise that target and it's zigzagging at a slightly more rich mixture. | |||
| Id073897 |
The ecm is zigzagging the mix across the midpt Where do you see that? Regards, Gunter | |||
| Xl_cheese |
In my logs. You can watch the o2 voltage swing constantly while in CL. Add that data pt to the graph to watch it. (Message edited by xl_cheese on August 07, 2008) | |||
| Id073897 |
Show me your log, please. | |||
| Biondo78 |
My bike goes very well with 02 sensor off ,in the cold start go a marvel, no casks issue no cough, the engine runs really smooth idle 1050 rpm. If I turn on , after learning ,afv to 85-90 and the bike has problems to be cold empty and idle low of 7° tps-20 bit. ??? Thanks a lot | |||
| Xl_cheese |
Take a look gunter. Perhaps I'm not quite understanding all this correctly. The o2 sensor is a shark tooth wave from 0.1 to .7V. The ego corr is almost a direct inverse of the wave form from the o2. It seems to make sense.
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| Id073897 |
This is just one log. You will need another one that shows the change in O2 voltage after/before moving the target voltage. Your log shows me a dangling curve between an upper and a lower limit. Looking at the numbers, the target voltage (0.49 in stock settings) is definitely not the midpoint of the O2 voltage range (0.0 - 0.72 volts) in CL. This could easily seen when setting adequate field min/max limits in the MLV. It also seems that fuel get's cut at a certain limit (~ 0.72 v), whereas the descending always stop with reaching 0.0 volts. IMO this doesn't prove your assumptions. It also raises a second question: is the lean voltage of any use in EGO correction at all? Or is it used only for open loop learn? Seems to me that the latter is the case. Regards, Gunter | |||
| Xl_cheese |
Yeah, that log is with the default settings. I wanted to tune it with default settings then when I'm done apply the target voltage mod. I bumped up the target voltage last night and I immediately noticed an increase in ego corr during idle in CL. with stock settings the ego corr was about ~104 during idle. Immediately afterward the ego Corr was ~108 | |||
| Id073897 |
I bumped up the target voltage last night and I immediately noticed an increase in ego corr during idle in CL. I would have expected that. It's acting like a P-controller when between the O2 limits, so a larger diff gives as steeper slope. The question is, what's happening with your average mixture. You reduced the diff on the "rich side", so the decreasing part (assuming this will always last until a certain O2 voltage is hit) will last longer. Regards, Gunter | |||
| Xoptimizedrsx |
something i see is if you move the mid point voltage you also will see the afv number move. so it is linking to the target afv reading setting the fuel to that value on a recorded read data during a ride. as i have confirmed. i move my mid point the afv changes. can you help explain this factor. on the afv reading differently after altered on the mid. this would xplain xl-cheese getting more fuel as the center value is where the afv reading is accepting the tareget. as i also see this on the dyno if i move the mid up a little. mike (Message edited by xoptimizedrsx on August 08, 2008) | |||
| Id073897 |
Yes, as AFV depends on EGO correction, it's understandable it will change too. But EGO correction does not only raise, but also reduce fuel. This part will (assumably) last longer if you move the target point upwards, as the difference between O2 voltage and target voltage in the "rich" region above target value gets reduced. If setting a new AFV is by any way dependent on time, this extended time while reducing fuel might show an impact on AFV also, not only the rising part. Regards, Gunter | |||
| Xoptimizedrsx |
good info gunter thats what i ahve been doing for aprox a year now. as i cann scale the amount of target in the or data to relay to the ego correction which will raise and/or lower the afv depending on the maps setting. as its a bit more complicated to actually do. being there is a couple steps done outside ecmspy in other areas. if i can ever get the new version up and going I'll add that to it then the targeted ego and o2 will be resetable as well as cross counts of data per second. you need a 30 count factory is 20. WHAT I SEE MOSTLY DONE WRONG IS COLD ENGINE AND NOT SETTING STATIC TIMING. the other best factor is lowering the closed loop in tps values. then you can get the extra open loop fuel % as well as elongate the applied time it last. same for the wot area. best to set ope n loop delay to zero. thanks for everything gunter and i'm still working on getting the new version made. its beating me up as i have to figure out a few things in programming writing skills. also to note i am doing a second tuning class tomarrow in orlando fl. 10 till 4 no cost to anyone "blake". free free its a no holds barred class bring a note book i tell all i know. even do a few tunings on peoples bikes while there. mike | |||
| Bombardier |
Do you reset the midpoint with another measurement device and O2 to ensure you are just not moving the goalpost to get the goal? What I am trying to say is - you may be getting the correct numbers on the readout but the sensors can only work within the parameters and outputs you set them at. A secondary device to measure the actual unmodified A/F would be required would it not when adjusting the O2 settings? |
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