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Old 05-15-2019, 04:56 PM   #12
Scooby Specialist
Member#: 76586
Join Date: Dec 2004
Chapter/Region: RMIC
Location: Denver, CO
2006 9-2x Aero


Fuel pressure regulator? Partly because its the only fuel system part you haven't replaced yet lol. Not enough fuel pressure at high boost. I would expect that to cause you to run lean and misfire,but not necessarily a sudden harsh cut. Maybe the ECU notices it somehow and cuts ignition.
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