Installation instrustions for the apex-i afc can pefound on apex-i's website at www.apexi-usa.com.  If your vehicle is not listed on their instructions, simply follow the basic instructions of installing the TPS wire to your car's factory throttle position switch sending wire, wire the power to the ECU's main power wire, wire the ground wires as instructed ot the ecu's MAIN ground wire, wire the sensor wire to the vehicle's main manifold absolute pressure sensor or mass air flow sensor, and wire the rpm wire to a reliable low voltage tach output wire or a coil wire with a fairly large resistor.  With any vehicle's factory schematic, installing the apex-i afc should be a breeze.  IF yoru car uses a pressure sensor, all readings read by the afc should be checked againes a real vaccuum gauge at atmospheric pressure and under idling conditions to insure the correct sensor type has been sellected.  On most cars, the blue wire can be tapped into an oxygen sensor sending wire and oxygen sensor voltage can be monitored in the "sensor check" feature of the afc.  Referencing the correct voltage is the tuners responsibility.  On some mistubishi vehicles that use the karman vortex sensor, input 1 on the afc can be used to monitor knock sensor output  (Mitsubishi computer controled vehicles equiped with knock sensors output voltage in proportion to knock.  that means that the more knock you have, the more voltage the knock sensor will produce.)  Mitsubishi's usu. use solid white wires for oxygen sensor and knock sensor leads to the ECU.