i HAVE A 93 CIVIC DX...LAST NIGHT JUST PUT IN A 91 LS MOTOR INSIDE...I HAVE A CODE 10...NEED HELP WAT IS IT?? i'm running ls ecu.

 

intake air temp sensor

 

You probably mixed the plugs up between IAT and EVAP. If this happened, you can pull your ECU cover off and see where the EVAP pin burned out. You'll have to resolder the pin for the EVAP unless you don't care which most people don't.