Short backstory
New engine 2/2016
New Tranny 7/16(new Ford)
Last month coils started going bad, replaced 1 rest started going bad replaced all, then as luck would have it had issues with some of the catalytic converters (all original beleive it or not) so now all new y pipe and cats.

Still ha ing issues with the misfiring. Rough file etc. Is that because of the new cats? Or some other problem... Was tight on money still am... Didn't get new plugs... Wondering if I just need to starve for a week and get them...

​​​​​​Or does anyone know of anything similar?

Also have a coolant leak that the engine guys are going to fix in the next week or so, (covered under their warranty, leak somewhere from intake manifold, mechanic showed me where a bolt had been broken off and here coolant is coming form.