I have a 98 zx2 Ck eng light comes on and flashing dtc po302 and po303 in pcm memory car shows no signs of missfire even when under heavy load?

Welcome to AF. MIsfire cylinders 2 and 3. Could have been a one time arc across the wires.
Reset CEL. Disconnect + battery cable 5 minutes.

Well thats has been considered but every time I clear it Comes back on in a few miles I have used a lab scope on it and can see no missfire Im leaning towards the pcm.