Reg diesel guy went on vaction ,and i got the duty of finishing up a 7.3 lack of power he was into , has contribution codes p0269 and p0278,i'm new to the diesel side and mostly work on 6.0l .
I know he ck compression and fuel presure , 6 months ago he replaced both valve cover gaskets and harnesses,i got to replace injectors on 3 and 6 and resealed other 6 cylinders. Its an old bus ,03 e-350 with 293,000, well i got done and it still has contributions codes on 3 and 6 , idles fine ,till it gets a little throttle , then runs rough and falls on its face ,ts been rode hard and put a way wet ,i e-mailed hotline , told me to load test wiring and to overlay ground from icm.wiring ok , tried icm , no change ,it does pass buzz test , valve train looks ok , could it be fuel volume?it only flags 3and 6 any suggestions.
thanks
