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turbo problems

998 views 5 replies 4 participants last post by  jlhess85 
#1 ·
My Brothers truck is a 05 f250. When he's running between 65-70 MPH the turbo psi's goes up to 12psi and then falls to 8 or 9. Sometimes the psi drops to zero all while maintaining that speed. The truck also loses power about 20%. The dealer said they were unable to duplicate the issue and could not find any problems.

Any Ideas of what it might be and how it could be fixed?
 
#6 ·
I have a similar problem, if not the exact same thing. When my rpm's are low (top gear 60-70 mph) and i try to accelerate slowly (without shifting down). I lose power and blow a ton of black smoke. I have a bully dogg downloader and I returned power setting to stock and it still does same thing. Occasionally it will act similar in 3rd gear - low rpms but not as bad as high gear. If I shift down or get into higher rpms all is well.

Does this sound like a turbo that needs cleaning?
I am not capable of doing this myself. Would it be wise to let the dealership do the cleaning?
Or better off at a different service place?
 
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