Re: Help...White Smoke, no boost, rear turbo grinding noise
Are you sure its white smoke, and not black smoke from running rich? If you had a sizeable boost leak past the turbo charger, the MAS could be measuring a lot more air than is actually passing though the throttle body. This, however, would not explain the grinding.
Before doing anything else, I'd check the turbo for shaft play and to see if you can freely spin it by hand.
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