While monitoring the Dual Mafs readings off idle. I noticed one Maf voltage reading slightly higher by .1volts at 2000-2500RPM no load. The egt on the driver side burns slightly hotter on the driver side also by 20 This would e the driver side where the idle air circuit gets air from a 5/8 hose . I have mine being drawn equally between bouth BOV. My theory is that air is being drawn in throught the throttle body and the idel air hose even off idle. The way to test this will be to run the engine between 2000-2500rpm and have someone pinch the idle air hose shut and observe the maf voltage readings on the afc. The .1 volts difference should get closer. I do know that while cruising and under boost, the egts are dead even with each other.