2006 6.0 F350 46,000 miles. I recently replaced the egr cooler and egr as the cooler was leaking. I cleaned the exhaust side of the turbo, replaced the EPS,MAP, Checked for exhaust leaks,checked the charge air boots, ficm is at 47.6 volt, ICP is at 715psi, duty cycle on the turbo at idle is 85% does go to 15% when it is under load. Still smokes black and lacks power at idle but when you get the rpms up it runs sweet! I also had to clean the intake out it had alot of coking from the coolant leak. Also when it does get boost pressure it is 20-25 psi. Im lost now....