Stuttering when starting to move
So lately my jeep has been stuttering when starting off from a stop. It seems to be getting worse, last week it threw a P0320 and P0420, I replaced the CPS, the O2 was replaced last year. Still having issues when I start off, not every time but frequently enough that I worry about it dying. I have to rev the engine quite a bit to get the issue resolved. Any ideas at this point would be helpful.
97 TJ 2.5l, 5spd. 2" BB, TeraFlex VS9550 Shocks, Hella 550s. Hard top, Safari top.