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Message: [QUOTE="blk99, post: 1267383, member: 5164"] So yesterday, i bought a 15 f350 fually with 13k miles and as i was driving home, when it would sit at idle, i could hear a loud growling/whining noise from under the truck.... well i took it to ford dealer this morning (warranty) and he just said, "i'll put you on the schedule for next week....no help.... so i researched and decided to change the fuel filters.... got motorcraft ones and followed everything i had read, including the purging cycle and BOOM noise was gone on start up.... Sooo as the day progresses and the fuel tank gets closer to empty (not sure if that matters) i noticed the noise was back faintly but nowhere near as loud.... ON EDIT: seems to still be there after fill up.... Any ideas? I dont know these 6.7's but i does NOT sound right and my brothers 11 with 50k has never made the noise... Thanks! Sent from my SM-G920V using Tapatalk [/QUOTE]

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