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I see no expert is helping you yet. I am not a diesel expert on here but I had a 2005 F350 with the 6.0 last year and I had a problem with the FICM, the voltages were low. I just bought the 1/2 shell for like $100 and it fixed it. Stopped smoking, too.
If you like, I will provide you with all the info I saved last year on that job. If not, I'll opt out and you can wait for Scott.