Does anyone here know if the Adaptive Fuel and Idle trims should be reset each time a new tune is flashed to the ECM? The manual recommends resetting them prior to each tuning session, but doesen't say what to do when flashing a new custom tune. Seems like the more I get into playing with the PV the more questions I have.

 

I know with the tuning software i use for my car every time you flash the ecu it automatically clears any learned fuel and idle trims. I think it is the same for PV but hopefully someone that knows for sure will let you know.

 

Yes, especially since VE (in the airflow section) is a measure of RPM/TP and AFR (in the fuel section) is in RPM/KPA.

With the PCV-AT the Fuel Adj. and Target AFR tables work the same way, so I'm used to that by now.

 

All adaptive values are automatically reset each time you flash the ECM

 

VE is a direct representation of the airflow model based on cylinder fill and the ECM uses this to calculate fuel requirements, raising this value richens the mixture while lowering leans the mixture. The AFR/Lambda table is essentially a table that represents the AFR the VE table was calibrated to. For example, if VE is synchronized correctly the AFR/Lambda table should reflect the actual mixture going out the tailpipe. On O2 sensor equipped bikes featuring calibrations with an AFR table this table along with the O2 bias table are used as a closed loop control however the AFR must be set to 14.6 to trigger closed loop, you then use the O2 bias table to set the value the ECM is looking for. Lambda based calibration use the lambda value itself as a control and closed loop is triggered with values of .98-1.02. Whether you have a Lambda or AFR calibration, the calibration give you the ability to set the closed loop area from approx 14.30-15:0:1 AFR as an end result, if you are looking for a richer (or leaner) mixture it will be open loop.

Hope this info helps

 

Thank You Jamie. Just what I wanted to know.

 

Thanks iclick.

 

Can anybody explain how to calibrate the speedometer? I see in WinPV there is a speedometer calibration & gear ratio in the stock tune but only gear ratio in the Fuelmoto tune. How does this work?, I would like an accurate speedometer.

 

Use the Speedometer Calibration setting. Raise it to lower the reading on the speedometer and vice versa. As a reference, my original value was 2058 and my speedometer was 4% fast (reading about 62.5mph at an actual 60mph) and 2135 was the right number to get it spot-on with my GPS.

The odometer changes with the Speedometer Calibration, so if the speedo reading is reduced by 4% so is the odometer, or at least that's the case on my bike. Originally, my odometer was 2% fast and changing the Speedometer Calibration made the odometer 2% slow, but that doesn't concern me as much as an errant speedometer.

Oddly, what the mechanical speedometer and ECM read as the speed are different. If you'll assign a gauge to the ECM speedometer signal ("Vehicle Speed" I believe it's called, or similar) you'll see the disparity, but I can't see a downside to having the ECM speed a bit high or low. I don't even know what that signal does in normal riding.

 

In WinPV, there is NO "Speedometer calibration" option under "Gear" in the dropdown tree when the Fuelmoto map is loaded, there is only "Gear ratios". There IS a "Speedometer Calibration" option as well as "Gear Ratios" when the stock tune is loaded. So if I adjust the Speedo calibration in the Stock tune in WinPV, and use the Fuelmoto map on the bike, how will this work? Or am I out of it?LOL