Incorrect...... If your K value is wrong you would be lean all throughout the rev range. It is not a FPR propblem because you are only leaning out one bank. You need to stop trying to tune until you rectify your problem
I am running factory 370cc injector, so the K value is 288. The lean out seem start from left bank first. but check with the logs. I think it will lean the right bank as well. BTW, let me re-gap to 0.8mm first, maybe spark plug misfire.
Replace fuel filter and try again..... Also start boost from wastegate pressure, increase 2psi at a time at most. Never go straight from wastegate to 14PSI. Measure AFR at wastegate pressure, increase 2PSI and repeat, If it starts to get a bit leaner try to richen it up. If it stays lean then your fuel system needs to be checked over. Remember the AFR "numbers" in the fuel map are an estimated/theoretical AFR, just because it says 12:1 doesn't mean it will be 12:1 at the wideband.
I did replace the fuel filter last year... So.. I don't think is the fuel filter problem. and yea... I used WBO2 AFR number rather then the one in fuel map. =)
If only people were logging fuelpressure vs manifoldpressure (differential fuel pressure). Then problems with the fuelsupply would stand out like a sore thumb... Just saying... That said. Your one bank leanment is probably a missfire in one of the cylinders. To large gap or a weak coil ore something like that.
yea~ finally, I did regap the plug to 0.8 and no misfire anymore. I am now running 17psi for my Zed with AFR 11.8 but I find a very strange thing in my fuel map. once the boost hit the 17psi, the AFR cannot really reach the target afr. I need to run rich before this point to avoid lean out too much when turbo spool to target boost level (17psi). Why my AFR is so strange? what cause to lean out for just that moment?
Do not forget the delay in receiving afr. Ecu reads cell then injects (obviously). Then there is a delay in ecu receiving afr from sensor as it is in the exhaust.
