ok thanks for help and please be patient because I learn still:) but I have a question. Is possible when my boost is over 1Bar something wrong is happened with my spark? So maybe I must have a bigger gap on spark plug? Now my gap is 0,8mm (0,031 inch).
Misfires? Does not belong in this subforum. Find a mechanic.
check plugs, coilpacks, icms in that order.