RomRaider

Hello everyone!
I need help checking the logs from my Forester SH with a 2.0 engine (EJ204) and a 4EAT gearbox to see if all the parameters are OK.
My concerns are:
1. Fine Learned Knock Correction - this parameter occasionally shows negative values ​​(never positive), up to -7.
2. Knocking Signal - the parameter is very rarely 1. In this log, it is always 0, but sometimes it is 1 when accelerating. In one 30-minute log, the value of one appeared three times and lasted only 1 millisecond.
3. A/F learning - LTFT is always positive, never negative.
4. The IAM value is constantly 1.0, despite the fact that FLKC takes negative values ​​and detects Knocking Signal. I checked what happens after disconnecting the battery. After re-enabling IAM dropped to 0, and after the first gas boost it jumped to 1.0 and has stayed that way until now (I've done over 1000 km since restarting the battery).
5. Feedback Knock Correction - romraider doesn't see this parameter for me. I've heard that it's important in knock diagnostics. Is there a way to enable it with my ECU?

Engine is stock, naturally aspirated EJ204, fuel is RON 98 e5. ECU has been remapped, unfortunately I don't have the map and I don't know what changes were made.

you will be unlikely to see any knock correction going on in the "knocking signal on/off" value as it will be changing so quickly. However if your fine learning knock correction is at -7 then the ECU is convinced something terrible is going on.

given that the -7 is at low RPM's it could be just something rattling around in the engine bay or even just a dodgy knock sensor. If you have the capability it may be worth loading the stock file for testing / log comparison - if its the same on the stock tune then starting having a hoke about in the engine bay and see if you can find where it's coming from. Worst case scenario then it could be its too late for tuning you might be out with the serious tools to dig deeper into the engine.

I checked the logs before the remap:
FLKC was occurs at -5 to -7 under the following conditions:
Acceleration Pedal Angle 33-55 %
Engine rpm 2000-2717
Vehicle Speed ​​50-55 km/h and 80-90 km/h

Possibly same problem:
viewtopic.php?f=7&t=11046

You can test to pull ROM with FastECU:
https://github.com/miikasyvanen/FastECU/releases