Loss of power

B0533. P0300no I also need to tell you that I had a busted front motor mount for while in this is in a Cadillac Deville 1998. And I ran on that for two or three months when it first started doing this couple months ago I've changed everything spark plugs spark plug wires airflow meter airflow sensor. And when I changed the motor mount and started running better but then now it's acting up again