Buddies 08 is smoking blueish white smoke when he is in the throttle. Truck has a Spartan Phalanx with a DPF delete and he is currently running the 40hp tune. He says he will punch it and rpms and boost will go up and will blow black then it will sputter and he looks at the mirror and its puffing blueish white. Anyone have any thoughts? Has 27k miles on it.