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Have you verified that you're not making boost at idle? I've heard of cases where engines and exhausts flowed better than expected and resulted in boost creep, but I have zero experience with it.my Holley EFI is reading 4-5 lbs of boost or 129 kpa at startup and idle.
Wouldn't it run like shyte if it was pushing 4 lbs of CO2 into the motor though?Is the CO2 on? Maybe you are leaking into the intake ...
You could unclamp one of the BOV and stick your hand over it.