hey guys. new here and desperate. so 2010 for taurus SEL started missfiring. got a code and replaced the plugs and coils and everything was good for a bit. now when i stop at a red light or stop sign the rpms drop significantly like it wants to die. it never has but it feels like its trying. wife says it missfires but i havent experienced it yet. read alot about the ECM causing a missfire but hoping i dont have to send it in. this car is going to be my daughters 16th birthday present as we have since bought an infinity wich is also a headache. any help from anybody who has experienced similar issues would be appreciated.