Hey there guys! IM tuning my ME7.2 bmw dme that is really similar to the ME7.1 you all guys use. Right now im trying to make the car run leaner then 14.7 (trying to get to 15.5 or so) between 1500 and 3K rpm while cruising.

I already looked at the map "KFLF-lambda characteristic map at part load" and that SEEMED that it would be the map that controls lambda at part throttle BUT right under its description, its stated that:

"The KFLF, KFANS map should not be used for intervening in the mixture, because the relative air charge rl must be
balanced to the engine demand via the pulsation map KFPU. If rl is corrected by KFPU faktor fgru has to be 1.0"


So anyone has any ideas on how can I change Desired/requested lambda at PT.? THANKS:)

Or send it open loop

Just adjust the O2 sensor map... takes all of 5 minutes.

The OP has a narrowband ECU, please don't nitpick

And if you target leaner than 1.0 on a narrowband ECU you will be running open loop all the time, and it'll still suck...

Open loop isn't an issue as you aren't trying to maintain tight control of a specific target AFR,  If everything else is calibrated nicely then control is typically within 0.01 lambda anyway.

Rick