@ spuzvica,
Just passing through & read your post.
I noticed in your video you have the 'IACV lost step' illuminated, this should not be.
see post #168 for some reference.
Try resetting the ECU to clear this
One idea I've read is that this can happen if your battery is not so good & is low on voltage (below 10v) during cranking or perhaps a slightly intermittent power supply or 'earth' to your ECU or stepper motor.
intermittent ECU power/earth could also explain your bad connection to PCHUD via the diagnostic port.
Regards
