2005 60 series detroit 14 liter egr help plz

Been having trouble with this truck since I bought it. Poor fuel mileage and low power. New turbo new cac overhead done and dyno and blowbye done. Checked out ok. Still having same problems. A chirping sound Comming out of turbo ,when you step on the gas it spits and sputters theres no power makes the truck shake. You can feel the motor shake.it almost sounds like someone beating a tin can comming out of the exhaust. Average mpg pulling an empty reefer is 4.3 we have went from about 6.4 to 4.3 mpg. Oil and water temps are fine. No problems starting . Oil pressure is about 43 going down the road. Been treating the tanks for algae issues also. Any suggestions on what might be going on? Any and all will be greatly appreciated.

 

Ok ty ill check out the dyno test results when I get home . And post stats . I put 6 inch straight pipes on awhile back would that have any conflicts with this being an egr motor?

 

We tryed one it got even worse fuel mileage if thats even possible ran like it does now but worse it sounds like the engine is falling out from under the hood

 

Theres 753,000 on her. We didnt deletes the egr we hooked up one of those egr delete modules on and it ran worse.