Thanks for the input!
Been a couple days driving with the CEL since I replaced the one before the cat. Started it this morning and there where no CEL lit at all. Weird. Started driving it and on acceleration it would pulse till you got on the highway. Made it all the way to work with no...
After cruising the forums, I replaced the Air Fuel Ratio Sensor (234-9002 Upstream) just before the single cat and after a few minutes of running it kicked out a p1130 code Bank 1/Sensor 1.
I searched quite a bit trying to identify an answer before posting, but found a lot of cloudy information...