What happens after 1.5bar?

[Dave]

Fellow Listers,

After the turbo produces 1.5bar pressure what happens?
 I'm trying to pinpoint my violent bucking problem, it
seems as though when I get to 1.5bar the car will
violently buck.  I'm guessing it's electrical because
it seems to continue happening even when it doesn't
reach 1.5 after the initial instance.  I am leading
towards the ECU for that reason guessing that it must
be reset to continue normally until 1.5 is reached
again.  Of course I hope it isnt I'd rather not but
another grand into the car right now but any input is
appreciated.

Thanks in advance,
Dave Pianka

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