I'm having spark issues. I have a 94 f150 lighting 5.8 I've had intermittent no start issues all summer. Replaced Icm seemed to fix the problem. Couple days ago. No start. Replaced coil,and pip in the distributor still no spark. In plugged the spout connector to rule out the computer still no spark!!! What is the deal here?!? Am I missing something? Ign switch? Battery has good voltage.