No boost

Nevada_TDI said:

Some have tried running the engine in a lower gear at highway speed to put more heat into the turbo vanes to possibly free them up.

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HILLS! I have a nice stretch of a (winding) hill that I use to "exercise" my cars. After two years of periodically using it to hammer on the wife's car's turbo I finally got the turbo to operate smoothly (never got an overboost, but you could feel the sticking as there was a slight drop/lull around 3,200 rpm).