My check engine light is blinking on my 1999 Mustang. It is running really bad like it feels like i have a lot less power... Everything is stock on the car.. I need help very bad.. Do you think maybe my injectors maybe be dirty and one is clogged.. The fuel filter has never been changed before but i have a new one... What do you guys think.. Are 1999 V6 Mustangs known for Head Gasket problems.. Its got 80k miles on it... Please help...