I just loaded the hd300 and fuel on 5 and now at wot I'm only seeing 20,000 rail pressure, at idle its at 5.1?When I'm on the throttle 75% or harder the truck has been pulling hard then just flat out falls on its face for a sec, like a east legate opened and loses all boost then when you get off throttle its OK. Check codes and nothing there. This has happened twice now. Seems like rail pressure was good with the 250 tune and fuel on 3*Any suggestions