Sounds like exhaust leak?
Got a question if someone can help me, I own a 05 f150 with 5.4 3 valve, and everytime I start it, doest matter cold or hot start, it sounds like the exhaust has a leak, and the engine runs rough for say 30 seconds then goes away. I bought the truck with 80,000 miles, it was well taken care of. You never hear the noise again untill you shut it off ,then re-start it again.
Any ideas? Truck runs perfect, good oil pressure, Lady that owned the truck used 5w30 motorcraft oil, changed every 3000 miles.
I thought it was a oiling problem, after speaking to my buddie that works for a Ford Dealership, he tells me it might be a CAM SENSOR, Ive owned 4.6 2 valve engines, they dont make this noise, any help ide be greatful!!