2003 ford 6.0 no power ?
 

Feels like the exhaust or the air filter is plugged.I am also getting codes for the air flow meter and boost pressure.Any thoughts?

Possibly a boost leak? Many other issues can linger here. Most common would be EGR clogged or stuck, Turbo vanes inoperative due to carbon, ICP sensors and so on. Do you hear the vanes in the turbo switching , In other words, is the exhaust tone changing at all?

would the egr make the rpms barely climb under load?But when in neutral they seem to climb no problem? .

updates??