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how much oil is in your IC?? If some, i say its ok. I would go thru your vac lines and make sure everything is ok. Look for signs of crack and check your one way valves. Don't look at some residue on your IC piping as sign of bad turbo. Unless you are smoking really REALLY bad and unable to boost correctly, i would not blame on turbos and go thru pain staking time to replace turbos.
Check your shaft place on the turbos that are on and trace all the lines.
Good luck.
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