Taken from SXOC:
"FAST says there are 6 types of ECUPart no. from MMYY to MMYY Spec23710-39F05 0990 on AP-CA18DT.MT23710-39F15 0990 on AP-CA18DT.AT23710-44F00 0988 1089 CA18DT.MT23710-44F01 0988 1089 CA18DT.MT23710-44F02 1089 0990 CA18DT.MT and 0990 NAP.CA18DT.MT23710-44F10 0988 0990 CA18DT.AT and 0990 NAP.CA18DT.AT
Looking at itLambda ECU 's are 39FAFM Mixer screw ECU's are 44FManual ECU's have 0 as the last but one digitAuto ECU's have 1 as the last but one digitAP - Anti Polution (Lambda) from 9/90NAP - No Anti Polution (AFM screw) upto 9/90before 9/90 all ECU's are non lambda so NAP not shown.MT - ManualAT - Automatic
Non lambda (NAP) manual trans (MT) had 3 revisions.23710-44F00 can be replaced with 23F710-44F01 but I don't know why they had both at the same time. Maybe different assembly plant or suppliers.23710-44F01 and 23710-44F00 can be replaced with 23F710-44F02 "
200sx S13s in Lat America never had O2 sensor. Not sure if its doable but you could get a JDM ECU and hook it up to a Wideband.
Use the search option next time. :P Jason's email is
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