anyone? i'm unfamiliar w/ the diesel partical filter, so i could'nt give my boss any ideas on what he can do. the dealer blamed the outside high ambient temp. and the steap upgrade he was climbing for the DPF failure. hes upset because he upgraded from a expedition to go racing at watkins glen race track and he doesnt want to go through this again. any help would be appreciated and it might even score me some points with my boss. thanks.