yah if your not using any oil i doubt theres anything wrong with the turbo. undo the little banjo bolt at the back of the intake and clean it out, if that doesn't work try unscrewing the alda to see if it picks up.

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93 b2200 EFI turbo, reg cab/short box, F2t swap build thread here
92 B2600i Cab plus getting a 82 3.0L 5cyl 617 mercedes Turbo Diesel build thread here
96 GMC 1500 z71 4x4 6.5L turbo diesel
Diesel all the way!!!