Hello I have a 2011 Mini Cooper s r56 with a N18, and when I start it up in the morning there is a very loud hissing and blow off noise coming from my engine bay, and the idle is also super rough and choppy, and when I try to accelerate up to speed the car lags really hard and won’t let me speed up until I give it more gas and it can build up boost. The only mods I have done are- charge pipes, catless downpipe,catless exhaust, aem ram air intake. And the only parts I’ve replaced are - water pump, vanos solenoids, intake manifold gaskets, exhaust manifold and gasket, and downpipe gasket. I have spent a lot of money trying to fix it but I can’t seem to get it done… SOMEBODY PLEASE TELL ME WHAT IT IS!!!!!!!