if any one knows about obd0 ecus i have a question ok well i have two ecus one when pluged in the led wont turn on and the other one when pluged in the ecu led stays on and i herd it was supposed to turn of that and i get a engine light on when i plug then in

 

Your question is too vague. Details are neededs to provide you with any assistance.

 

If the second ecu is giving you a solid LED light inside it then it probably means its a defective ecu. Does your car start and run normally on either of the computers?

 

i havent been able to get it started at all with eather ecu