Hi everyone!

First of all, sorry with my bad English, It´s not my native language.

Since I have plug a new 4bar FPR, I´m having problems with lambda adaptations.

I have OEM injectors (317cc at 3bar) and to adjust the new injector scaling I set KRKTE to 0,089028335 at 16bit using KRKTE Calculator.

My lambda it´s OK, but after driving some kilometers (maybe 50-100km) I see in channel 33 SFTS lambda adaptation fluctuates between -1.6%/1.6%

In channel 32 lambda adaptations are -0.4% in the first value (So KRKTE it´s fine) and +3.9% in the second value (here is my problem)

At idle, the injection time fluctuates between 1.7ms/2.04ms, but idle is perfect, not oscilates.

What would be the problem? I must try to adjust FKKVS for non linearity injection, KFKHFM for maf non linearity, or TVUB for injector latency? I have reading a lot here, but my head is a mess...

I have a 2.75" downpipe without cat, and no OEM intake airbox (I just have an Apexi one), inlet pipe is a Forge specific for my engine.

Please help! I would like adjust lambda adaptations and leave it between 0 and +-1%

I have tried this, but if I do that, first value go up to -1.1% and second value go up to +4.4%, so, it doesn´t work...

Hi Ddillenger! You suggest that 3.9% isn´t bad at all? I ask this, because google translator it´s so bad and I trying to understand all...

I´m thinking that the problem could be at KFKHFM map, because I have reading, and if you change your intake system/track it could affects on maf readings and lambda adaptations go out.

What do U thinking about this?

However, I will log in a few runs, load & RPM vs. SFTS to adjust properly FKKVS, it´s correct? 

I´m back! hahahaha

I´ve been doing some runs logging intake mass air with OEM intake air box and my Apexi setup.

With OEM intake setup, I have 175g/s peak max air, but with the Apexi setup y only see 165-167g/s max air.

As I supossed, with no OEM intake setup KFKHFM must be adjusted to keeping lambda adaptations right.

Doing a minor adjustements at various points of the table, I have this results:

SFTS at idle: oscilates between -0.8% and +0.8% aprox.

LFTS: in first value I have -0.2% and in the second value I have +2.1%

I think there is an improvement, but still I have to do a run logging air mas quantity (g/s) to see if the readings have increased again to approach the OEM readings.


Any feedback is welcome.