I'm still hunting for the best tuning for my engine (427 FE, with Dual Quad Ez-EFI 1). Specifically relating to fuel consumption and A/F ratios. The question I have today is how does the Ez-EFI work out how much additional air is being drawn in by the PCV? I've done a search on the forum but not found any reference to PCV. My engine (when looking from the front) at the moment has breather on the left side valve cover. On the right side valve cover is the PCV connected to 3/8" hose that connects to the ford lowriser dual plane dual manifold. (in the middle of both throttle bodies). As this air is being drawn in below the throttle bodies the Ez-Efi has no ability to monitor this, until readings are taken by the o2 sensor, which then tries to correct. Fuel consumption of my engine seems very high and I'm wondering if the ECU is detecting a lean condition due to the additional air from the PCV and dumping more fuel in to compensate. On the hand held, at idle of 850rpm with the engine warm, it is showing 006 lb/hr for fuel. 1000rpm fuel rate goes to 012 lb/hr (A/F ratio currently set at 14.7 for idle and for cruise). Should I connect the PCV to one of the 3/8" vacuum ports on the throttle body? Would that provide any benefit to the ECU, or are those vacuum ports below the sensors anyway? Should I continue to use a PCV or remove it completely? Thanks for any thoughts / opinions or suggestions.