l really need help on this one! l just do not get what the problem is. l just changed the head gasket and tried to start it back up and the next thing l notice there is no spark coming from the ignition coil (engine cranks and battery is fine). The timing belt and the setting is all fine. Its an 6 cylinder overhead camshaft engine. All the vaccum lines, fuses, seem fine.

Sorry l can not answer your question but l will tell you that most Mercury technicians HATE working on these vehicles.They are not Ford systems but a Nissan Quest clone. l really think you will get better responses by posting this under ''Nissan'' instead of Mercury.
Hope this helps !