The CLB is almost the same as the stock one for my bike that comes with the SEPST 205UH005. I think the dealer service changed one number in the 30 column when they did a smart tune back in 09. Had something to do with popping. I would like to know what other people see when they do these data runs. Maybe what I am seeing is normal. Don't know.

 

Have you done smart tuning yet? Sounds like the front jug is slightly rich and closed loop is correcting it (spikes). Smart tuning should bring the front VE values down around the area you now see .9
The sensors are narrow band thus .9 is not far from the mark and not a cause for worry imo.

 

I actually did several smart tune runs and adjusted the VE tables with the smart tune values just like the documentation said. They were changing very little. This is a capture of a section of my data run graph for o2mv. It's from frame 565 to 575 while the bike was at 2275 rpm and steady throttle, level road. the entire graph for the data run looks pretty much the same in a range spiking down to about 0.30 then up to around 0.95. Does my graph look similar to others who have done the DIY tuning? Am I on the right or wrong track here.

 

Does anyone know what the ECM uses the intake air temp input for? Does it influence AFR or anything else?

 

There is an offset starting in 09 and by 12 was significant, like the MV read will be in the 1300ish range. 08s, you saw the actual voltages, 09 up, those voltages are NOT centered around 450 due to the offset. What MOCO does, is apply a permanent voltage to the GND side to raise the voltages seen by the ECM.

Having the fuel dithering around 1000 or better (on O2 voltages) I think makes for a finer toothed comb to filter the O2 voltages.

OOTTOMH, can't remember 09 voltages, but I'd say you are OK.

 

It influences everything there is from fuel to timing, you can NOT remove it.

 

Sorry. I'm not that familiar with this. So that went over my head a little. My CLB table value for that rpm/map cell was 645 during that run. That's the setting that came with the calibration for my bike. I think you're saying there's another offset pushing the O2 mv readings up a little. Did I follow you correctly? And that would explain why they're in the upper range on the chart. Bottom line is that things seem OK?

 

As long as the values are going up and down in a range of about 1.2v down to about 0.1 I think you're fine. They're not supposed to "hoover" anywhere. If they did it means they're probably broke. They have to cycle to work. So I wouldn't pay much attention to the O2 voltage data you see in that chart.

 

I agree, I just checked some of my logs and similar fluctuation. In any case .9 would be about 14.0 AFR thus nothing to worry

 

Thanks. I won't worry about it. The bike runs fine and I get great mileage over 40mpg. No pinging and no popping. I think it's tuned right.