My explorer has a rough idel when sitting at a light I have cleaned the throttel body the IAC valve and the mass airflow sensor had plugs and wires and fuel filter put on it and had fuel pressure checkd. I was told it is running rich but im not sure why. It only idels rough after it warms up. I have also checkd for vacum leaks but cant find any. Can you please tell me what I can do to fix this rough idel. Also catlic converter rattels a lot.