2003 7.3 Liter F350 running rough (missing)
I have a 2003 7.3 Liter F350 diesel that has a problem in that after running a few minutes (15-20 minutes) and it is warmed up it starts missing especially when under a little bit of a load: Meaning going up a hill versus on level ground or down hill. Also I use 100% or less bio diesel for fuel depending on the outside temperature.
What I have done so far:
1. Drained all bio fuel and removed the fuel tank and inspected for anything that would cause fuel starvation (i.e. clogging, debris, junk, bio diesel residue,… etc). Tank was clean and suction screen clean on sending unit. Remounted tank and filled with new regular diesel fuel.
2. Removed and replaced frame rail mounted fuel pump.
3. Installed new fuel filter.
4. Removed and install new Injection Driver Module (IDM)
Problem still exists and error codes still point to the IDM as the problem but this can't be unless new one was also bad.
Truck starts and runs great when cold but after a few minutes the engine starts missing and rough running with ever decreasing power available (especially under load). If I am going up a hill it will actually stop (engine shuts off after coughing and sputtering).
Has anyone had the same problem and what do you suggest next.