TIGGZ_S13

I have a 93 ka24de which i had changed the motor on, the previous engine started knocking so i bout another engine. At first we couldnt get fuel, the pump wasnt priming and when i checked through i found the ECU with a burned diode (i think thats what its called). I changed out the ECU and got it to start. It ran for about 2 days and when idling it just shut off and now it wont start, its not the battery, its not the starter. Im not getting spark or fuel. I checked the fuses and found none blown. What else should i check? Could I maybe have a short or something causing these problems?

Thanks in advance for any input.

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