Alternator Control acts strange

[kaputnik]

Hi,
I am trying to get the alternator on 5.7 HEMI to charge with MS3X and V3 board controlling the field Current.
The only mode which gives stable voltage is High-Speed Feedback Field Control, but it regulates with like 0.9V offset.
With 13.2 V as target I get 14.1V shown in TunerStudio.

I am running 1.3.2 Firmware, D14 with ignition IGBT (ISL9V3040) as power stage for the fieldcoil.
The coil draws like 4.5A @12.2V if I ground it so it should be OK.

Is the cause of the offset maybe some config error?
Can some one estimate if the ISL9V3040 and the board are OK with the current?

[Matt Cramer]

Can you post a data log along with the MSQ? This may give us more to go on.

[kaputnik]

Ok, I can take some logs at the weekend and post them