My uncle's '04 cummins is throwin blue smoke out the exhaust. On his way up during acceleration it starts to... lope, and starts lopein' again on the way back down when he lets off the gas. At idle it purrs and is smooth. he has an edge in line programmer. He talked to a dodge mech who said he needs anew computer. its got 150k on it
please help

 

Sounds like injectors

Luke