The 45k service is called a fuel/induction service is the main service performed. they clean the intake with spray can cleaner around the t-body and upper intake. then they will put a fuel attitive in the tank. and then pressure clean the fuel injectors with a special maniflold and shop air that pushes cleaner through injectors(injector flush) plus they will inspect/replace the air and fuel filters, pcv,fluids, brakes,tires., etc...
it is a good service but rather expensive too.

1998 Contour V6 se ATX Black Bassanni w/o resinators, modified intake box, DMD New headlights w/ silverstar 9005's, blue neons inside, metal waterpump, pioneer head, pioneer 5x7 3 ways,2 10" subs, 800w amp, 17x7.5 motegi mr12 p215/45/17