misfire cylinder 8 64k misfires clyinder 1 4k misfires in same time peroid.

No oil, valve cover gaskets replaced, as well as other items in the kit. No residue in tubes. Removed coil springs cleaned tested strength, replaced. Injectors not dirty, additive added to fuel.

What are the codes that are showing up now since all this work has been done. Is it just the misfire codes or are there other codes showing up. Also what codes were there when the problem started before you did all the work you have done to it so far.