hey guys, need some help please with my coupe. for the past few days the car has been breaking up when on high boost going over abt 1.3 bar overboost. i thought it was plugs at first but got that changed and no difference. so I checked for fault codes and p0100 came up. this is afm correct ? afm has been changed not to long ago, still running stock z20let afm. now the problem has got worse, when going into boost, it does not want to boost to over .7 bar and after .5 bar there is a very loud noise that sounds like the air escaping or the tubo is crying to boost. there is also very lil smoke from exhaust after a drive. can afm cause this or is the turbo gone ? or is there maybe a boost leak somewhere ? vacuum seems ok. please help guys, thanks.