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Old 04-21-2012, 02:51 PM
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2003 with turbo lag

I brought home an '03 6.0 last night with 140,000 miles on it. It was a "one owner" truck that hasn't seen hardly any towing or work. It is all stock and is in good condition. It's got stiction on cold starts so I'm hoping some oil additive will clear that up. On acceleration, it seems the turbo is very slow to spool up. There is no codes at all so I'm figuring the VGT vanes are probably coked up and are unable to move freely causing poor acceleration. I've driven newer 6.0's ('05-'07's) That spool up much faster. Will a 2003 turbo spool up slower than newer ones because of having less vanes? Any other input would be great before I remove the turbo to inspect and clean it.
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Old 04-22-2012, 08:05 AM
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Any ideas?
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Old 04-22-2012, 08:15 AM
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There is NO difference between the 03 turbo and the other 6.0 turbos (except whistle sound) Sounds like you gave a dirty turbo. Pull that thing off and clean up your unison ring and the vanes. While you are in there, I would rebuild the oil cooler and delete the EGR and fill it up with some fresh ELC coolant!
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Old 04-22-2012, 10:49 AM
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Yep, that is the plan. Just started tearing into it this afternoon.
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Old 04-22-2012, 11:06 AM
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Good luck! Its not too bad of a job. Just takes a little time if you haven't done it before.
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