1994 F-250 5.8L I have no spark!I have changed out the ECM,pick-up coil in the dist.and yes it turns,the coil,and the EEC-IV comp.checked all fuses and fusible links,could there be a ignition lock out switch wired into the fuel sys.ie: low press or no fuel press?Help before I either shoot my self or the truck I got myself into this mess offering to help a friend,Maybe I'll just go ahead and shoot myself as I haven't learned my lesson @ helping friends in need as they are friends indeed!!!!