Changes on your fuel system or maf changed?

FKKVS is for fuel system if you use other injectors.

In my aproach use:

MLHFM => use to linearize when MAF diameter or sensor are changed
KFKHFM=> use to correct amount of air (load) from diferent intake and air filter from OEM
FKKVS => use to correct amout of fuel (lambda) from diferent injectors
KFLF=> use to tune diferent lambda values

if MAF is OEM => MLHFM must remain the same
If inlet/intake are OEM => KFKHFM will remain the same, or little changes
if injectors are OEM => FKKVS will remain the same (TUVB too)


If I change MAF, intake and injectors my sequence is:
1- calculate KRKTE and TUVB (look at data sheet to TEMIM TEMINVA close values)
2- change MLHFM to new profile
3- make FKKVS, KHFM and KFLF flat
(You may want to flat LAMFA and disable BTS at this point, I usually leave it crude protection with KFLBTS, KFDLBTS disabled, LAMFA stock)

4- unplug N112 (wideband will not make STFT changes)
5- start driving around with low and medium loads.
6- make sure load is around it would be, is it´s not => KFKHFM
7- Start working on FKKVS to enrich and make all lambda =1
8- when it´s fine enough, make some basic enrichment in LAMFA to be safe enough to run some higher loads and start tuning.

(again, it´s my aproach)

If your load is reading high chances are your MAF is overscaled.

You should learn more about the theory behind what you are doing.

If you changed returnless to return the fuel line, this is your issue, there is a curve that enrich to compensate the returnless behavior (less fuel when the pressure goes up in manifold)... can´t remember the name...  I guess it enrich about 15% indeed...