to the guy with the jdm/usdm ecu just take the jdm stuff for the maf scaling both g/s and voltage and copy them over to the usdm ecu. they read the same thing and if the scaling is the same the fueling will be the same too. copy over all the timing tables including the load and rpm axis to make sure they match. if you have a wideband drive it around a bit and see what the afr's are cruising. afr correction will help as well. it can add upwards of 25% fuel but the stock ecu setting is 15% plus or minus. you can change that to a larger value i believe.