Okay, let's assume it's the turbo (turbine piston ring) that's bad...
Try and do a high idle test?
Shift trans into neutral...
Rev up to 4kRPM's for at least 10 seconds.
Do you see smoke out the exhaust?
Do you see a LOT of smoke out the exhaust or a little?
Does it smoke more when you go into boost?
-Ted
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