Just adding to this, i am getting the same backpressure codes. However i did the EBPV mod to make an exhaust brake., but I hardly use the function. A few days ago, my truck seemed to lack in power as if there was a restriction like when the EBPV was closed. I looked at the actuater rod and the valve seemed to be fully open. I then changed the IAT sensor because I believe that I ruined it while cleaning my air box. Nothing changed as far as the lack of power. Another thing to add is that my truck has been straight piped for quite sometime and I believe that my truck actually sounds a bit quieter than before all this happened. Any suggestions?
2002 7.3
afe stage 2 pg7
banks power pack minus the engine module
superchips High performance tune