no spark or intermitant spark
 

have an 86 non-turbo it would occasionally cut out for a minute almost like a spark plug grounding out if you waited for it to straighten out before you turned it off it would start back up
but if it was turned off while running rough it would lose all spark coming out of the coils I have tested the resistance on the coils and the crank angle sensor both test ok car still has no spark
any help or sugestions welcome local mazda dealer thinks all cars have pistons . oh hey when the key is on if i pull the egi comp fuse the electric fan comes on. please help ?