My 98 4.6L goes into a bit of a skipping frenzy during a low rpm pull like going up a hill. Also skips around 2000 rpm at 70-75 mph on interstate. This happens more frequent when the truck has ran or been driven a while. Sometimes the truck runs fine...then sometimes it skips. If i push down on the gas when it is skipping and the truck downshifts it bogs down as if it is losing power.....again sometimes it does it and other times it is fine.

My check engine light says p0430 and p0401, which p0430 has to with catalyst below deficiency bank 2 while p0401 is insufficient flow for EGR

Does anyone else have this problem or know what is causing it to skip at times and lose power? What should I do....already replaced coil pack on bank 2 side.