My friend has a 1.8 16v duratec mondeo which has developed a misfire. She said its been to a garage and its had 2 coil packs on it. The engine has over 100.000 miles on it. Im going to see the car today to replace the spark plugs n leads. Im just hoping this will cure it. She has texted me today saying that her engine light has come on. I hope its got something to do with this misfire. Ive been out in the car and it only seems to misfire when the car is under load.