I have a 2011 F-350 with the 6.7. Check engine came on today and it started running very rough as if it wasn't running on all 8 cylinders it has a very rough idle and sounds like there is some blow back in to the air intake box. I do not see any oil in the coolant nor any coolant in the oil. All gauges seemed to be in normal range. Any ideas???

 

Could be a few reasons, need to get codes why C/E light is on.

 

Waiting for a friend to bring his dianostic equipment over so we can retrieve the codes. I hope it nothing major.

 

Maybe some contaminated fuel? Water for example.

Eric

 

Diagnosis is saying #4&#5 fuel injectors need replaced

 

Have you tried to run some seafoam through the system to see if it might clear out the injector