And according to the MAP on my 2002 WRX im looking over now, along with running a richer fuel mixture, the ECU itself would cut boost.
TurboQueef thinks that this failsafe function it zeroes IAM to go into the safe fueling table... if this is how it does so, "Boost control Disable" under the "Boost control limits" section in romraider says its disables when IAM gets down to 6 or less. (16 bit)
So this means no boost beyond spring pressure, no advanced timing, and a richer fuel table will all be enabled by grounding this test mode lead at the ECU.
Has anyone tried this setup with meth? I'll be testing the theory at least when I get another taxtrix cable!