No Spark!

[imthedude]

Hey all van was running fine went to leave work, turned over fine but no fire eventually after after cranking awhile it fired ran like roflroflroflrofl then held an idle got her home and can't get a spark, gave her some starting fluid still no spark. Just replaced cap rotor plugs and wires still no spark. Any ideas I have crusty wire that isn't making a good ground thinking it could be the problem will try and post a pic of that. Any help is appreciated I'm a novice I know a little but not a lot. Also can't seem to figure out how to check codes?!