I know its a long shot but I have 2 ECU's that the previous owner to my car gave to me with purchase of the vehicle. One is a P30 and the other is P72,they are both OBD-I. I got numbers off of the chips inside.. P30 has : 5311A 334 44 A

Then on the opposite side says

YEAM63B1YCN3
KCM12
63B01YORCN3P
3C1 J JAPAN

P72 has: 9312A 515 81A8

Then on opposite side says

YEAM63B1YCK8
KCM11
63B01YORCK8P
4M1 J JAPAN

Any help is appreciated. Thanks guys