im on ebay looking for an ecu and everyon is posting the part number, what am i supposed to do with these numbers

Keep the ecu you got, it should be an eprom, that means u can get dsm link

This may help figuring which ECU is what....

-Electronic control unit
('90)
AWD w/Calif ECS - MD145902 - $1110.85
AWD w/o Calif ECS - MD145903 - $1110.85
FWD 2.0L Normally aspirated w/Calif ECS - MD128622 - $1040.11
FWD 2.0L Normally aspirated w/o Calif ECS - MD128624 - $1040.11
FWD 2.0L Turbocharged w/Calif ECS - MD128623 - $1040.11
FWD 2.0L Turbocharged w/o Calif ECS - MD128625 - $1040.11
1.8L SOHC w/Calif ECS - MD120845 - $973.00
1.8L SOHC w/o Calif ECS - MD128658 - $973.00

('91 to '92)
AWD auto trans w/Calif ECS - MD165532 - $914.00
AWD auto trans w/o Calif ECS - MD165531 - $1079.15
AWD manual trans w/Calif ECS - MD166263 - $1013.82
AWD manual trans w/o Calif ECS - MD166262 - $1013.82
FWD 2.0L Normally aspirated w/Calif ECS - MD166256 - $1013.82
FWD 2.0L Normally aspirated w/o Calif ECS - MD166255 - $1013.82
FWD 2.0L Turbocharged auto trans w/Calif ECS - MD165530 - $974.55
FWD 2.0L Turbocharged auto trans w/o Calif ECS - MD165529 - $1013.82
FWD 2.0L Turbocharged manual trans w/Calif ECS - MD166261 - $1013.82
FWD 2.0L Turbocharged manual trans w/o Calif ECS - MD166260 - $1013.82
1.8L SOHC w/Calif ECS - MD159562 - $977.54
1.8L SOHC w/o Calif ECS - MD159561 - $1238.05

('93)
AWD auto trans w/Calif ECS - MD193296 - $1028.52
AWD auto trans w/o Calif ECS - MD193300 - $993.49
AWD manual trans w/Calif ECS - MD193295 - $1028.52
AWD manual trans w/o Calif ECS - MD193299 - $1028.52
FWD 2.0L Normally aspirated w/Calif ECS - MD166256 - $1013.82
FWD 2.0L Normally aspirated w/o Calif ECS - MD166255 - $1013.82
FWD 2.0L Turbocharged auto trans w/Calif ECS - MD193294 - $974.02
FWD 2.0L Turbocharged auto trans w/o Calif ECS - MD193298 - $974.02
FWD 2.0L Turbocharged manual trans w/Calif ECS - MD193293 - $985.20
FWD 2.0L Turbocharged manual trans w/o Calif ECS - MD193297 - $1028.52
1.8L SOHC w/Calif ECS - MD159562 - $977.54
1.8L SOHC w/o Calif ECS - MD159561 - $1238.05

('94)
AWD auto trans w/Calif ECS - MD193296 - $1028.52
AWD auto trans w/o Calif ECS - MD304485 - $1051.38
AWD manual trans w/Calif ECS - MD193295 - $1028.52
AWD manual trans w/o Calif ECS - MD304484 - $1099.23
FWD 2.0L Normally aspirated w/Calif ECS - MD166256 - $1013.82
FWD 2.0L Normally aspirated w/o Calif ECS - MD304481 - $1110.22
FWD 2.0L Turbocharged auto trans w/Calif ECS - MD193294 - $974.02
FWD 2.0L Turbocharged auto trans w/o Calif ECS - MD304483 - $1072.42
FWD 2.0L Turbocharged manual trans w/Calif ECS - MD193293 - $985.20
FWD 2.0L Turbocharged manual trans w/o Calif ECS - MD304482 - $1083.14
1.8L SOHC w/Calif ECS - MD159562 - $977.54
1.8L SOHC w/o Calif ECS - MD159561 - $1238.05

('95)
2.0L Normally Aspirated auto trans - MR4874192 - $498.75
2.0L Normally Aspirated manual trans w/Calif ECS - 05013112AA - $758.02
2.0L Normally Aspirated manual trans w/o Calif ECS - 05013113AA - $666.00
2.0L AWD Turbocharged - MD312464 - $816.00
2.0L FWD Turbocharged - MD309947 - $793.94

('96)
2.0L Normally Aspirated auto trans - M04887050 - $639.00
2.0L Normally Aspirated manual trans - MR4887051 - $651.40
2.0L AWD Turbocharged - MD321911 - $840.42
2.0L FWD Turbocharged - MD321912 - $840.42
2.4L SOHC - MD326327 - $710.43

('97)
2.0L Normally Aspirated auto trans - 05293014AC - $457.80
2.0L Normally Aspirated manual trans - 052593014AC - $457.80
2.0L AWD Turbocharged - MD326328 - $737.10
2.0L FWD Turbocharged - MD335287 - $737.10
2.4L SOHC - MD326327 - $710.43

('98)
2.0L Normally Aspirated auto trans - 05293014AC - $457.80
2.0L Normally Aspirated manual trans - 052593013AC - $457.80
2.0L AWD Turbocharged - MD346676 - $573.02
2.0L FWD Turbocharged - MD346675 - $621.48
2.4L SOHC w/Calif ECS - MD339763 - $621.48
2.4L SOHC w/o Calif ECS - MD345713 - $615.57

('99)
2.0L Normally Aspirated auto trans - 05269834AK - $740.13
2.0L Normally Aspirated manual trans - 05269833AK - $909.17
2.0L AWD Turbocharged - MD359403 - $800.20
2.0L FWD Turbocharged - MD359402 - $800.20
2.4L SOHC w/Calif ECS - MD359404 - $800.20
2.4L SOHC w/o Calif ECS - MD359405 - $806.40