Violent Cutoff (I mean really violent)

[Kneale Brownson]

I replaced the wastegate solenoid that I thought was preventing me from
getting more than 1.3  bar  with a used one supplied kindly by Ingo.
Started out the driveway with an eye on the gauge and saw 1.8 just before
the car jerked violently.  Felt like I ran into a wall.  I thought I'd
maybe hit the rev limiter, but when I've hit that in the past, power just
disappeared.  This felt like I hit the brakes as hard as I could.

Here's the old solenoid with a bunch of cracks in its plastic and the
pretty patina of corroded copper winking through:
http://www.pbase.com/kneale_brownson/image/43360819

Ingo's solenoid was different in that the tab that's supposed to fit into a
slot in the rubber hose from the air cleaner box (see the arrow in the
image)  is 90 degrees farther around the assembly.  In other words, instead
of being 90 degrees from the electric connector, like on the one I took
out, Ingo's is 189 degrees from the connector.  Could this indicate that
the solenoid is not correct for this car?  Could that be causing the
violent cutoff?