An in-op turbo symptom is usually an in-op boost enrichment.

First, the turbo spins on a film of oil, no oil flow means it might not have that film, which allows it to touch metal, and have significant drag. Also allows some radial play.

The wastegate has a mechanical arm, very hard to see, on top of the turbo assembly. I have seen two with that arm disconnected on the turbine side, which would allow the wastegate to stay open.

Back to the load enrichment failure. You need to check the fitting on the intake plenum near the washer-bottle, blow through it to ensure it is clear, check the overboost protection / switchover valve on the inner-fender (connected to the aforementioned fitting) the same way (should go in the bottom fitting), then be sure that the center fitting from that valve (a solenoid valve actually, N.O.) goes to the top of the alda (through a Y). You can also temporarily run a line directly from the intake plenum to the ALDA to see if that makes it run properly.

This is posted about once a week, that's about how often it comes up.

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Gone to the dark side

- Jeff