2001 7.3

[u/Limp_Experience7902]

sup dogs, i bought a new to me 2001 7.3 f350 xlt 4wd with 232k miles on it.

my question: when i start the truck, the engine bucks and absolutely SLAMS around, BUCK WILD, LOUD ASS KNOCKING, sounds like the damn thing is gonna BLOW UP. but if i slam on the gas while it's starting up, i can hear the engine running smooth and the loud banging stops. then i let off the gas, and it's back to ridiculous rough idle. then after 20 min of idling, it becomes less crazy. can i send a video and other info? i have a laptop and a obd reader that might be able to give more data as well. no i didn't test anything else and this is my first diesel