All plugs are evenly black? or just some of them? Weak spark on all of them. looks like its either the pick up coil (any of the crank, cam position sensor, or the actual pick up coil if there is a distributor) or shorted out coil (if theres just one), or your ignition control module, or a relay that activates coils (if you have several of them)
Please describe what type of ignition you have