Thanks guys. No codes whatsoever right now. A couple months ago I was getting those cyl # codes with my first set of new coils and plugs within a few hundred miles. That coincided with a definite miss under load. Second set of new coils and plugs and no more codes.
I'm on my way out the door to go get a new PCV valve. It makes sense that it would be a problem with a manifold vacuum (below the throttle plate) accessory because it happens at a transition when opening the throttle from cruising. Thats why I suspected the egr. That, and it seems to happen when the egr should be open. Also, I have opened and closed the egr valve with a vacuum source and found the valve to be functional. Since I can't do that at highway speeds I have no idea if it's actually working when it's supposed to. Anyone have an egr issue without throwing a code?
Thanks again.