boom problem
 

Hi guys,didnt write some time sorry.I have a problem when I up shift and when I kick clutch the engine goes bum on exaust (very loud)but not always do that.I dont have codes and rise boost with two washers.I think that I have a fuel leak but somewhere because when I was driving on rain when parked her there I saw a fuel in water below car.Maybe because of that I now have too much air in engine?

That's post ignition. Excess fuel hitting the heat at the catalytic converter and igniting is the typical culprit. Start with checking the timing belt, mechanical and ignition timing.