So my sister has been driving it a lot. Anyway she ran the oil bone dry and the radiator is busted so it ran hot. She said it was smoking then shut off and now it will not crank. We put oil in, Change the spark plugs, we even unplugged the battery for a good two hrs thinking It might be the ECU. I know its not locked because it will turn but just wont fire

Is there any suggestions how to resest the ECU cause im thinking it will not let the car get gas right now. Thanks guys