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Re: UrQ Overboost.

Doubt that a weak diaphragm would violently let go repeatedly, if its toast,
its toast at all pressures.  1.7 (.7 absolute)is about stock max boost for
the TQC.  Have you modified it for higher boost without making changes to
the ECU/fuel pump?  Have you run abpove 1.7 bar previously without incident?