Well after the turbo, vgt solenoid, egr valve, and intake air temperature sensor i still dont have the truck fixed. The biggest thing I have noticed now is that its not cycling the egr like it used to. Before I could hear the distinct exhaust tone and then it would cycle and all you could hear was the wistle. Now I can hear the exhaust tone, but when it tries to cycle to the turbo whistle you can hear the engine change tones, but no whistle. Any ideas?