okay, I have a question... I am at the point of starting the 5.3 and I am trying my hand at the HP Tuners software. I turned vats off and it fired right up but running rich is an under statement. I am using a PSI harness and all sensors are there except the rear O2s. I turned them to no error reported in the DTCs but still idling really rich!!!! Is this normal at first? It has not been driven only sitting there at idle.