my driver has been complaining of low power on his 2005 international 4400 with a 30 foot 30k pound bed. i have stored codes for 1-6 high side to low side on the injectors, which i find on about all dt466 that i have ever scanned, and vgt under duty cycle, i cannot feel a mis, but it does have low power. it struggles to climb over bridges, empty. i have changed the fuel filter, cleaned the screen, and saw on my scan tool that my turbo is producing around 29psi at full throttle but i also noticed that when it was time for me to shift the boost would drop into the teens or low 20s. the turbo actuator goes all the way out and back in and bounces and stops at about 1/2 travel with koeo. the other thing i have noticed is that the idle surges from 600-850, i installed a new ipr and that went away for about a week and is now back, oil only has 6k on it, coolant is full and proper additives installed, we are in south Florida so its not the cold weather lol. it does not seem to lose more power while it is in operating temp so i am hesitant on dropping the exhaust but i will if you guys think it is a viable option. 508600 miles on the engine 6 speed manual trans thanks in advance max boost 29.7 boost at idle cold .3 boost at idle hot 2.8-3.3 ebp at idle 2.1 operating temp 200f-212f vgt off set at idle -550 -598 vgt duty cycle at idle 89%-97%

Daniel from Florida