I was having some trouble with my truck an 04 F-250 4x4 4 door 6.0 Diesel.
Rough idling..... falling on it's face when taking of from a light. The manuels say to change the air filter only when the guage in the air box says to. I looked at guage and it says its okay.... I looked at the filter it looked from what I could tell to be okay too... I have 30k miles on the truck.
So I just picked up a air filter for $102.94 at the dealer. I installed it and the truck works fine now... W.T.F. is up with the guage???