Thanks for the fast reply. I have tables for this card and yes it seems to miss two letter but there is none more written on the sticker that is not damaged to. The fact is I changed the function 3 acceleration control and 1A setting from 10 to 35. But it seems that 1A will close even if not full throttle is asked by the operator. I will go back there today and I will try to feel the problem better as in when situation it occurs the most, also will carefully check the potentiometer like suggested in the first post. I will come back with more info and try also to find another identification number on the card see if complete.