Hello, I Have a 2009, DT 466 that is hard starting after it sits. This happens 90% of the time. The truck will have to spin over for several long tries before it starts and sometimes for the first minute it runs real rough then clears and runs great. Sometimes it is hard to start even if it's been shut off for only a few minutes. We checked for fuel leaks, replaced the fuel filter assembly, replaced the electronic control at the fuel pedal which seemed to help for a week or two. It has been to an International Dealer and several other shops. I have put thousands into this and still have the same problem. Can anyone help?? Thanks.