bucking above 1.1 bar, max boost 1.3

[Jeff.Bernstein at pneumaticscale.com]

The only time I have experienced the extreme bucking that you have described
is after I have cleaned my motor.  Apparently I was getting water into the
distributor and this would cause the bucking at any boost over 1.0-1.1 bar.
In a couple of days the moisture would clear and the car was fine.  I wonder
if you may have gotten water up into the engine compartment and have a
similar situation.

Good Luck,
Jeff Bernstein