Long story short.
My car is 94 OBD1 GSR

used to have ITR OBD2 ecu... no CEL

got another OBD2 chipped ecu from a guy.. CEL comes up.....

pluged in my friends DB GSR ecu... CEL went away but idle funny...

question is if i plug in a regular obd1 gsr ecu will the CEL go away and everything is back to normal? Also i might get a free OBD2 w/ harness.... is there anyways i can make the work on my car w/ no CEL?