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Message: [QUOTE="Twan, post: 754905, member: 4719"] Got a 2005 6.0, 155/50% intake manifold, studs, gaskets, fuel return and stock turbo. Was all down at once, now the truck will peg a 30psi boost gauge until 2200 rpms, after 2200 the boost falls fast, will drop under 20 by 3000 and egts get hot and lots of black smoke. No exhaust leaks, no intake leaks, was pressure tested. Turbo was checked out and all free moving. Going to have him check drive pressure and try changing the VGT. Any other ideas? [/QUOTE]

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