Hmm.. I would think the codes..
P0175 bank 1 too rich
P0172 bank 2 too rich

Could be related to the CPS not firing as it should and creating a "rich" condition as far as the sensors are concerned..
Throttle pedal possibly from this too?

Now what an hour or more pulling the NW off..put stock back.. another hour putting NW back on afterwards..

Or spend 40 bucks and 30 minutes putting the new CPS in... Decisions Decisions ..

Not to mention time dealing with the dealer..