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Old 02-04-2009, 09:46 AM
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turbo problem?

Hi i've been a long time looker but first post, I usually find everything I need with a search. I looked at a few pages to see if i could find what i was looking for but lunch time is almost over. Well here goes, i have 2004 f350 completely stock with the execption of full exhaust and diablo sport prog. Sometimes, not everytime in the morning especially when its cold out I start it and there is a loud drone from the exhaust. I have a 3.5" to 4" to 5" straigtpipe exhaust so usually it sounds like a jet from the get go. The other times the drone does go away and the whistle starts up. Its like the turbo isn't even hooked up, I did check to see if that sensor was hooked up and it is. On the way to work it felt like the turbo wasn't spooling at all, does this sound like the turbo is going bad, or something is stuck, sorry if I could find this in a search, and thanks for your help.
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Old 02-04-2009, 10:03 AM
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im having the same exsact problem, it did it one time in the summer when i was mud bogging with it, then it did it this morning again, same thing your saying. i let it sit and idle for about 15 mins and it was fine, but i have tried driving it while its doing that, and there is no boost at all, you can deff feel that its not working and i can floor it, and my boost gauge will not move. dont worry one of the techs here will help us out!
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Old 02-11-2009, 10:55 AM
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This is just a safety feature. When your exhaust temp gets so hot, the motor defuels and shuts the turbo down. As far as when its cold, I have no clue except for a few seconds when u start it. I brought my truck to the dealer three times and there was nothing wrong. I found this out with my Edge Evolution because it has a built in safe guard and does the same thing when it gets to 1200 degrees. If u do have a bad turbo I have one off a '05 that I swapped a Cummins into after I blew my head gaskets, and two injectors went out. Its got 85k on it. I just pulled it off yesterday.
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