Pretty sure there is a boost leak. My Tial knockoff has a soft spring. Will be replacing with authentic Tial Spring soon. DCI, Big Tom FMIC, Tial knockoff BOV (soft spring), Straight piped. RB Oems w/ upgraded wastegates, ER chargepipe, gutted DP's, VTT inlets I suspect my fuel injectors to be failing/leaking. Recently replaced spark plugs & turbos.