Other Homework Help

i own a f250 diesel 7.3 and yesterday heard a knock that was unusual but  it went away quick,this morning when i went to start it  ,it knocked for a coupple of  minuets then went
away so i changed  the oil ,oil filter and then i changed the fuel filter,it stoped knocking
but it is losing power and blowing white smoke ,i put in the tank a bottle of octane booster antigell treetment do you think it could just be bad fuel? or what?