Question 2004 Ford f-250 4x4 60k miles

[BubbaNtx]

Hello folks Had my truck in in September Egr cooler and Egr valve, said everything alright, Put about 1000 miles on it Now when driving stumbles and can hear it Backfiring thru the Exhaust Fueled it up at another Fuel station ran OK for about a week then Started stumbling again then Farting thru the Intake Taking it back in again Tomm.. Any Ideas

 

[BubbaNtx]

Backfiring thru the Intake Sorry

 

[dennisj2003]

Sounds like a turbo, mine done this and sometimes would loose power, changed turbo at dealer and it has worked fine.