EMAX - thanks for the reply. Did you wind up having to change your VE tables for the various cam lifts as well? To compensate for the increased airflow w/reduced velocity, you would have adjusted the "MAF airflow vs. output frequency", correct? How did you determine the correct % to adjust it by? Did you use a histogram of the MAF vs. LTFT? I've modified all of my VE tables for the various cam lifts and seem to have eliminated the P0171 errors, but the truck has a terrible stumble when you stomp on the gas from idle.
I have another question - I can't seem to configure the scanner to read either one of the trucks O2 sensors. I'd sure like to be able to see where they are at. I've also been getting P2A01 errors (O2 Sensor Circuit range/performance Bank 1 Sensor 2) since I made the modifications. Have you been able to configure the scanner to read both O2 sensors?
Thank you for your assistance.