The reason the light is coming on is because there is a problem. It isn't common for Fords to have a misfire unless there is an ignition problem, electrical problem, or it is in need of a tune up.
Please explain what is happening, have the computer rescanned, and let me know what the code is. Chances are it needs a tune-up or some other simple item.
Thursday, April 9th, 2009 AT 12:20 PM