Misfire

I have been battling with an engine misfire problem for several months. The engine runs rough at idle and low speeds but it seems to occasionally run smoothly when you disconnect the mass airflow meter.

I have replaced the injector nozzle fuel rail, I've had the black triangular actuator lever at the front of the intake manifold replaced because it had a slight crack. The intake manifold flaps have been checked and it seems okay. I've replaced a few coils. I've replaced the harness wires. I've replaced the mass airflow meter. I've replaced two camshaft position sensors.

Right now there is a constant misfire on 4 cylinders on bank1 driver's side (left-hand drive car). The car produces black smoke. The spark plugs on bank 1 are always covered in black soot. Fuel economy is poor.

Here are some trouble codes below:

Trouble Code(s)
P0100: Mass or Volume Air flow - Circuit Malfunction
P0100: Mass or Volume Air flow - Circuit Malfunction
P0010: Camshaft A Position Actuator A Control - Circuit open (Bank 1)
P0113: Intake Air Temperature - Circuit High Input (Bank 1 Sensor 1)

Last Trouble Code(s)
P0100: Mass or Volume Air flow - Circuit Malfunction
P0100: Mass or Volume Air flow - Circuit Malfunction
P0010: Camshaft A Position Actuator A Control - Circuit open (Bank 1)
P0113: Intake Air Temperature - Circuit High Input (Bank 1 Sensor 1)
P0057: Heated Oxygen Sensor Heater (HO2S) - Circuit Low Voltage (Bank 2 Sensor 2)
P0300: Random/Multiple Cylinder Misfire Detected
P0305: Cylinder 5 - Misfire Detected
P0307: Cylinder 7 - Misfire Detected
P0306: Cylinder 6 - Misfire Detected
P2629: O2 Sensor Pumping Current Trim - Circuit/Open (Bank 2 Sensor 1)
P1347: No description available
P2182: Engine Coolant Temperature Sensor 2 - Circuit Malfunction
P0279: Cylinder 7 Injector - Circuit Low
P2026: Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit Low Voltage
P0430: Catalyst System Efficiency - Below Threshold (Bank 2)
P0629: Fuel Pump A Control - Circuit High
P0637: Power Steering Control - Circuit High
P0657: Actuator Supply Voltage - Circuit / Open
P0650: Malfunction Indicator Lamp (MIL) Control - Circuit Malfunction
P0563: System Voltage - High


Please assist.

Kindest regards,

Muhammad


Additional information:

I have also replaced the ECU (brain box) twice. Yet, the problem still persists.