My car roughly has 168k on it. I have BC camshafts, aem cam gears an a Turbonetics t3t4 turbo an waste gate. With Blitz BOV. Replaced Pistons an rings recently. Car has spark to wires is timid correctly but the plugs are black when I check them not dripping wet but residue will rub off on my fingers when I hold the firing end of the plug. Fuel pump works fine. Nothing is blocking the air. Car doesn't leak oil. Checked the IACV seems fine. Cleaned the throttle body. I don't have the correct tools to check the coil. But figured if the plugs had spark be ok? It's throwing misfire codes in all 4 cylinders and a vtech malfunction in bank 1. Any ideas?? Thanks in advance!