I purchesed a used fast system and this is what I'm seeing.First off the car started up without the ecm connector @ battery plugged in and once it started it ran very ruff(blowing gas out exhaust).I talked to someone and they said that the map sensor (3 bar) was not getting a signal and to connect it to the middle wire from the maf to the middle wire @ the map sensor,did not workI could not get a power reading from that wire however I could get one from the pink??/tan?? with the black stripe once connected there it idled pretty good and did not blow gas through the exhaust.....