2003 Cummins start and idols fine has a knock / miss under acceleration it comes and goes.
several codes
p0633
p0483
p0480
p0192

the fan clutch wiring in cut I’m replacing it.
The engine oil level may be rising?
not sure someone else added oil when it was low then it was overfilled

 

Anybody have an idea?

 

When my '03 experienced 'missing', it started with a once in a while miss and got worse over the next 100 miles or so. Not as bad as your's. I pulled the sticks and sent them to F1 for testing/rebuild. Only one was good as it was changed under warranty at 95k miles. After the rebuild, truck ran beautifully. I'm not sure about your P0192 code as it refers to your rail pressure. I don't know if an injector sticking open would lower your rail pressure enough to toss a code or not, but it will rinse the oil from the cylinder and leak down into your oil sump (raising oil level).

As for the P0633, I had that forever. Never figured it out and never found what it affected, if anything.
Back to morning brew . . .

 

Thank you I’m going to try throwing new injectors in it, I’m sure it needs them at 370,000

 

Update new injectors installed correctly, still has low rail pressure.
truck will initially fire up an idol fine when you give it throttle, it will go into fuel knock as if the FCA has been unplugged and then with low fuel rail pressure code will come on.