So I own a 2008 RAM 2500 6.7l TD. This is my first diesel, have had it for 6 months and 6k miles. The turbo performance is not consistent. Sometimes it just screams, but most of the time the performance is just average. Originally I thought it was temp oriented, or a warm engine, but no consistency. I am trying to figure out why, because I like driving it more when it is screaming. It is bone stock! When this happens at about 1600 RPM it just boosts, UNBELIVABLY. The rest of the time just gradual boost from 1600 to 2500. Any ideas for me?