Differential diagnosis for slow with power on/off...

[Zorb]

I was told by a VW engineer that the factory turbo used variable vanes.

This problem started before changing plugs.

[P1054]

I was told by a VW engineer that the factory turbo used variable vanes.

This problem started before changing plugs.

This won't answer the original question, but for the record I'd say the engineer was mistaken.

Here is the compressor wheel from my right side turbo when I was rebuilding it..


And here is the turbine wheel from the same turbo..