Do a boost leak test and see if there are any boost leaks present and report back to us. It's too hard to keep throwing suggestions at ya without ruling out other possibilities first.

Once again...what did you gap your plugs to?

 

I got it on video, too. I just never bothered to edit it and upload to YouTube.

 

Ok thank you for your effort. I do not know sizes of plugs but dealer gave me oem spark plugs for evolution and i just put them on car. Before it i was using ngk iridium 9 bor8eix. They burnt and i changed them to manufactory spark plugs.