I also posted this in the 5th gen forum, but I didnt know how many un-turbo/supercharged members use SAFC's so I am posting it here too. I finally recieved my SAFC II yesterday . I have a few questions I need answered if possible. I have the Maxima 2001 disc with all the ECU ports and what they are, but I can only locate the Knock Sensor, Throttle Position Sensor, and 3 different 'ECM grounds'. Which 'ECM ground' do I use, and is it correct that I only use one and tap into that one twice?(the 1cm thing). Also, I see a 'Power supply for ECM' and a 'Sensors power supply' on my ECU diagram, are either of those the one I use for power? Any help would be appreciated!