Sneakin Deacon

ok, the short story is...got my car tuned on a thursday, ran perfect, parked it, took it out on sunday and then all of a sudden once it goes into PE it is a dog and wont rev over 4k. i know it isnt the opti as i have a delteq setup. only codes i have are EGR elec. fault, left/right 02 fail (shouldnt affect WOT though) due to unheated o2's and longtubes.

i highly doubt it, but could any of the values have changed so drastically, as to cause this?