Weird noise after doing pull
1998 ram 2500 12 valve cummins
I did a pull on the highway yesterday and not theres a weird noise. Im replacing the fan clutch this week, the fan got dramatically louder after the sound started. I drove another hour and a half after the sound started because i couldnt be stranded, the sound hasnt changed. I suspect either the exhaust manifold, an injector or something internal but i am not sure how to test for these. There is black soot on the first two cylinders of the manifold. Im not sure if it was there before or not.
The sound happens whether the engine is hot or cold, it is rpm dependent on the frequency and sound dependent on the load (if i let off after accelerating it quiets down for a couple of seconds) thats why i suspect an injector.(but i really hope not) if you can think of anything please let me know, i am in miami and there arent many trustworthy shops so anything i can do to diagnose i would rather do myself.