Update,
Well the Mass Air Flow sensor and new EGR have cleared up some codes, but I am still getting the P0420 code and P0452 code. I have already changed the fuel pressure sensor above the fuel tank, so I don't know what else it could be?
I think I may also need a new converter. The 02 sensors are working as designed. I can see the upstream sensor flunctuating and the downstream sensor is more of a steady output. My scan is giving a description of the P0420 code as Catalyst System Efficiency Below Threshold Bank One. The freeze frame data for the P0420 code was this, Calculated load 9%, short term fuel trim bank one 0%, Short term fuel bank two 0%, Intake manifold Absolute pressure 13.3 in h.g
Coolant temp 180 F, Long term fuel trim bank one 3.12%, and long term fuel trim bank two 3.12%, engine rpm 834.
I didn't do a live data run today of the 02 sensors, but I remember when we got the P0420 code last time the Freeze Frame had a value for the short term fuel trim bank one and two and now it is giving me a zero for both. Not sure what this means? But I sure appreciate all the help y'all have given me especially Cat Fuzz.
Thanks
NCH