NefMoto

(continuation of a thread from the tuning section, since I never got an answer it felt like it might be more appropriate to post in here, original post is http://nefariousmotorsports.com/forum/index.php?topic=23477 (http://nefariousmotorsports.com/forum/index.php?topic=23477))

I've been having an issue with my narrowband 1.8t 4b0906018P ever since I swapped to a 3 inch MAF housing, where the engine will run absurdly rich at light throttle to the point that it stalls more often than not when coming down to idle. I can sometimes see it even hit 9 AFR, and I can feel the car bogging when it happens. The weird part is that changing KFKHFM has no effects. I also have an emulator installed in my ECU, and I can see that only the first cell of the map is ever being accessed, and changing that one cell changes the fueling for all load/rpm (even when at high RPM or load).

This behavior continues even on a stock BIN file, so I'm certain it's not my fault for messing up axes. Could someone verify that first of all I have the correct location for KFKHFM, and second of all what my problem might be? My address for KFKHFM is 0x151A5. Attached are my tuned file, and also a stock file for reference.

I flashed a stock bin to the car and I can see that it's only trying to access the first cell of each axis, which leads me to believe that there's somehow either a hardware issue or this ECU never had a working KFKHFM in the first place. Here is a video of what I'm talking about: https://youtu.be/Utx8VPZ-Gt8 (https://youtu.be/Utx8VPZ-Gt8) Map tracing appears to function perfectly for KFMIOP as an example, but KFKHFM is mostly stuck at the top left aside from a few odd blips. I did also log rl and nmot, and they appear to be perfectly normal. My logs also show that the MAF voltage does spike when I have the rich condition, so this does appear to just be some odd turbulence in the intake causing the issue and as I understand it KFKHFM would normally be the correct place to correct it.

As for actually correcting my issue, from what I can gather the FR shows that KFKHFM should always be active in turbo engines and it uses only rl and nmot as inputs (which I logged, and both look perfectly normal), so with a stock bin file I can't think of a reason it should be inactive at any time. However, I've seen some discussion floating around that certain ECUs just don't have working tables to correct the MAF.

Could my ECU be one of these, in that even though the table "exists" it's not functional? If this is the case, do I really have any options besides a wideband ME7 or standalone conversion?

381EE6h is fkhfm_w ?
380B00 is fkhfm