2000 Honda CRV P0300 And other misfire codes

It came in for a check engine light producing a low voltage o2 code, After shutting check engine light off, right off the bat it popped up cylinder 4 misfire and Random misfire codes,

So we start with well over due plugs wires cap and rotor, Reset light, and before we could get it into gear, WAMO! Same problem, however its not running all that rough for having a miss on atleast 2 cylinders, Fuel filter is oe and injectors are good,

I think the fuel filter is the purp, will check fuel pressure monday, Sound about right?