Awesome job on listing out the codes and info. Thank you very much.
P0134 is no activity on bank 1 sensor 1. That's the front aka upstream O2 that reads all the engines activity and allows the pcm to control fueling. I'd check that sensor and replace it.
Fuel system 1 status OL-Fault: This means the system is faulted to open loop running, which by default is meant to run the car on the rich side.
It would help if you got a pcm that was tuned for the EGR being deleted. Also it would help if you tracked down which part of the traction control system was bad
